#xor
2 writeups
heapn⊕te-ic
Midnight Flag CTF 2026 · 2026 · Mar 15, 2026
Signed-length bug on glibc 2.39 turns into a heap primitive. Safe-linking leak, unsorted-bin libc leak, tcache poisoning through an XOR cipher, and a forged exit handler chain.
#heap #glibc-2.39 #tcache #safe-linking
hard nimrod
ImaginaryCTF 2025 · 2025 · Jul 5, 2025
Stripped Nim binary that XORs input with a keystream derived from a hard seed. Extract the keystream at runtime with gdb and XOR out the flag.
#nim #xor #gdb #keystream
easy