Codefest CTF 2019
11 challenges with 15 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 CTFtimeReverse engineering3
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- engineering
- reverse
Same technique in picoCTF: file-run2, WinAntiDbg0x100, WinAntiDbg0x200
- reverse
- engineering
Same technique in picoCTF: file-run2, WinAntiDbg0x100, WinAntiDbg0x200
- reverse
- engineering
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
Misc3
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
Same technique in picoCTF: Codebook, convertme.py, Bases
Forensics2
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
- forensics
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
Web1
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
Steganography1
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
OSINT1
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
- recon
Same technique in picoCTF: Permissions, Specialer, Codebook