CSCML CTF 2020
13 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 CTFtimeWeb4
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
- websec
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
- websec
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
Misc4
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- puzzle
- javascript
- game
Same technique in picoCTF: Permissions, Specialer, Codebook
- face
- detection
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- git
Same technique in picoCTF: Blame Game, Collaborative Development, Commitment Issues
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
- heap
- calloc
Same technique in picoCTF: tea-cash, sice_cream, zero_to_hero
- python-exploitation
- crypto
- bufferoverflow
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
Reverse engineering2
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- reverse
- engineering
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reverse
- engineering
- re
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
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.
- random
- crypto
- rsa
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle