X-MAS CTF 2021 Second Weekend
9 challenges with 11 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeMisc4
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Also written up in: BaadMaro/CTF
- biology
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
- solidity
- smartcontract
- ethereum
Same technique in picoCTF: Reentrance, Smart_Overflow, Access_Control
- misc
- programming
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
- solidity
- smartcontract
- ethereum
Same technique in picoCTF: Reentrance, Smart_Overflow, Access_Control
Binary exploitation2
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
- pwn
Same technique in picoCTF: lockdown-horses, Guessing Game 1, Bizz Fuzz
- pwn
- rop
Same technique in picoCTF: lockdown-horses, Guessing Game 1, vr-school
Forensics2
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Also written up in: BaadMaro/CTF
- web
- discord
Same technique in picoCTF: Live Art, secure-email-service, No FA