ctf-writeups

K17 CTF 2025

Link: https://ctf.secso.cc/challenges

CTFTime: https://ctftime.org/event/2902

Official Writeups: https://github.com/unswsecsoc/2025-k17-ctf

Result: 6319 Points, 5th Place

Solved Challenges:

Meta:

• sanity check
• discord

Beginner:

• radioactive
• smoothie
• el camel
• pass me the salt
• daily re
• ezwins
• jumping
• dinner
• vault

Misc:

• phished
• tunnel

Crypto:

• layers
• tricks
• worsehelp

Reversing:

• secure exam browser
• bait and switch
• qna

Web:

• janus
• autofill
• pwnable document format

Pwn solved by @Rosayxy:

• u get me write
• singular hole

Thanks for the writeup prize!

Our official write-ups are now online hosted in our repository here. Congratulations to jiegec for winning the writeup prize, you can see their writeups here: https://jia.je/ctf-writeups/2025-09-19-k17-ctf-2025/.

We'll see you all again next for our CTF next year!