Cryptoverse CTF 2023
10 challenges with 19 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.
- ocaml
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc
- programming
- maths
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Cryptography3
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
- crypto
- aes
Same technique in picoCTF: Timestamped Secrets, AES-ABC, Compress and Attack
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Crypto/Warmup 1
1 writeupSame technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Binary exploitation1
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: Guessing Game 1, x-sixty-what, format string 3
Reverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- reverse
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
OSINT1
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook