Securinets CTF Quals 2021
14 challenges with 20 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 CTFtimeMisc10
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- python3
- misc
- hacking
Same technique in picoCTF: PW Crack 1, PW Crack 2, PW Crack 3
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- dh
- warmup
- mitm
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
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.
- lsb
- rsa
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
- javascript
- web
Same technique in picoCTF: Java Code Analysis!?!, Client-side-again, dont-use-client-side
Reverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- warmup
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
Steganography1
Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.
- stego
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden