Access Denied
10 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 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
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- js
- web
- jquery
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
Cryptography2
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
- caesar
- cryptography
- rot7
Same technique in picoCTF: Mod 26, New Caesar, credstuff
- bacon
- cryptography
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Forensics2
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
- misc
- forensics
- miscellaneous
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- forensics
- stego
Same technique in picoCTF: FindAndOpen, Glory of the Garden, Investigative Reversing 0
Reverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- assembly
- reverse
Same technique in picoCTF: Forky, reverse_cipher, Easy as GDB
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook