corCTF 2025
6 challenges with 7 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 CTFtimeBinary 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.
- linux-kernel
- pwn
- amd
- side-channel
Same technique in picoCTF: CVE-XXXX-XXXX, hijacking, VNE
- linux-kernel
- 0day
- pwn
Same technique in picoCTF: CVE-XXXX-XXXX, hijacking, VNE
- ld_preload
- nsjail-escape
- pwn
- tc
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
Reverse engineering3
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- vm
- brainfuck
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- functional-programming
- rev
- google-sheets
- transpiler
- oop
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- vm
- rev
- floating-point
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300