![]() d - quick & dirty mode (skips deterministic steps) c cpu - the CPU to run the fuzzed program f file - location read by the fuzzed program (stdin) ![]() o dir - output directory for fuzzer findings Winnie 1.00 - Forkserver-based Windows fuzzerĪfl-fuzz - \path\to\fuzzed_app You need to regenerate the offsets and recompile for YOUR system. If the offsets are wrong, the fuzzer will not work. As you might expect, these offsets vary from system-to-system. The forklib relies on hardcoded offsets that are reverse-engineered from csrss.dll and ntdll.dll. Still, you need to prepare the build environment before compiling. We try to make the build process as streamlined as possible. The fuzzer requires Administrator permissions.įuzzer can fuzz both 64-bit and 32-bit applications. Windows 7 isn't supported because of differences in the CSRSS and subsystem implementation. Notwithstanding that, it probably still works on most 64-bit Windows 10 systems 1809 and up (but no guarantees). Any other configurations should be considered as unsupported. The fuzzer was tested on Windows 17763.973. experiments/ - Driver programs for testing individual components of the fuzzer.samples/ - An toy example target application to fuzz with supporting files and harness.wow64ext/ - Library for interacting with 64-bit address space from 32-bit (WoW64) applications (forked).ipttool/, libipt/ - Controls the Windows Intel PT driver (forked from winipt).intel-libipt/ - Prebuilt binaries for Intel's libipt.Communicates with the fuzzer over a named pipe IPC. injected-harness/ - A forkserver and instrumentation agent DLL which gets injected into fuzzing target programs.forklib/ - Magic library where the fork() happens.afl-fuzz/ - Main fuzzer code ( WinAFL fork).For more details about Winnie, check out the NDSS paper. Winnie-AFL is a fork of WinAFL that supports fuzzing using a fork()-like API.
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