Really Awesome CTF 2021
24 challenges with 44 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 CTFtimeOSINT6
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
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook
- osint
Same technique in picoCTF: Permissions, Specialer, Codebook
Web5
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
- web
- lfi
Same technique in picoCTF: Bithug, Secrets, Forbidden Paths
- golang
- 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
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- sqlite
- web
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
Misc5
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
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
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.
- pwn
- reversing
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- pwn
- reversing
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- pwn
- reversing
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
Steganography3
Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.
- steganography
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden
- steganography
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden
- steganography
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden
Reverse engineering2
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- reversing
- pwn
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reversing
- pwn
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300