2023from public repositories
Gemastik 2023
4 challenges with 4 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised2
The upstream scoreboard did not say, so neither do we.
FCaaS
1 official solutionAlso written up in: kos0ng/ctf-writeups
Also written up in: SandWithCheese/ctf-writeups
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Solve it with:JWT decoder and signature verifierJWT alg=none bypass generatorWeb attack payload catalogJWT secret brute forceLearn: Sessions, tokens and access control
Databreach
1 official solutionAlso written up in: IloveNooodles/CTFs
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
Pwnworld
1 official solutionAlso written up in: IloveNooodles/CTFs