how does afl flips bits?
I found this code while looking at AFL++ code and was curious to know how it worked #define FLIP_BIT(_ar, _b) \ do { \ \ u8 *_arf = (u8 *)(_ar); ...
Nov 2, 20234 min read
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Rediscovering CVE-2023-36617 (ruby ReDoS) with fuzzing
summary CVE-2023-36617 Two ReDoS bugs existed in the Ruby uri module. Both bugs cause the program to hang and eventually throw a URI::InvalidURIError error. They affect version v0.12.2 of the gem. The commit has some tests that help understand what w...
Aug 21, 20236 min readhxp 2022 - archived
archived chall: archived by sandr0 difficulty: easy description: I’m using this super secure big company open source software, what could go wrong? Two credentials are provided, admin and regular user. The challenge consists of a server and an a...
Mar 16, 20235 min readSolving pwnable's - orw - 2/???
https://pwnable.tw The challenge description says: Only open read write syscalls are allowed to use. But is that enforced? How? Seccomp Taking a look using the ghidra decompiler: void orw_seccomp(void) { int iVar1; undefined4 *puVar2; undefined...
Jan 11, 20235 min read