2023found by harvest
CyberSci Regional Qualifiers 2023-24
3 challenges with 4 published solutions between them. No writeups were ever filed against this event's listing, so its solutions were found in public repositories instead. Each link is pinned to the commit it was read from.
The event listingReverse engineering2
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
Hash Vault
1 official solutionAlso written up in: Green-Avocado/CTF
Puzzle Vault
1 official solutionAlso written up in: Green-Avocado/CTF
Binary exploitation1
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
String Storage
2 official solutionsAlso written up in: Green-Avocado/CTF, Green-Avocado/CTF