TetCTF 2021
8 challenges with 18 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 CTFtimeWeb3
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- web
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
Binary exploitation3
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
- srand
- printf
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- pwn
- c++
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- pwn
- c++
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
Cryptography1
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.
- rsa-crypto
- complex
- rsa-like
- gaussian
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- fsb
Same technique in picoCTF: Permissions, Specialer, Codebook