2024no writeups on CTFtime
GEEK CTF 2024
14 challenges with 14 published solutions between them. CTFtime lists this event but has no writeups filed against it, so it is absent from the index CTFtime feeds. These were found in public repositories instead. Each link is pinned to the commit it was read from.
The event on CTFtimeMisc5
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Solve it with:Brainfuck and esolang decoderCipher identifier and automatic decoderRegex tester with match offsets and capture groupsLearn: Recognising encodings
Boys Bullet
1 official solutionQrcode2
1 official solutionRealornot
1 official solutionRealornotrevenge
1 official solutionWhereismyflag
1 official solution
Reverse engineering5
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Solve it with:Strings extractor for binaries and blobsWebAssembly disassemblerJava .class disassemblerPython .pyc bytecode disassemblerLearn: Binary exploitation
Lucky Numbers
1 official solutionLucky Numbers Revenge 2
1 official solutionPeer Trace
1 official solutionVbscript
1 official solutionWhats This
1 official solution
Binary exploitation4
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Solve it with:ROP gadget finderShellcode assembler and libraryCyclic pattern generator and offset finderFormat string exploit builderLearn: Binary exploitation
Memo0
1 official solutionMemo1
1 official solutionShellcode
1 official solution