performing-fuzzing-with-aflplusplus

# Performing Fuzzing with AFL++ ## Overview AFL++ is a community-maintained fork of American Fuzzy Lop (AFL) that provides coverage-guided fuzzing for compiled binaries. It instruments targets at compile time or via QEMU/Unicorn mode for binary-only fuzzing, then mutates input corpora to discover new code paths. AFL++ includes advanced scheduling (MOpt, rare), custom mutators, CMPLOG for input-to-state comparison solving, and persistent mode for high-throughput fuzzing. ## When to Use - When conducting security assessments that involve performing fuzzing with aflplusplus - When following incident response procedures for related security events - When performing scheduled security testing or auditing activities - When validating security controls through hands-on testing ## Prerequisites - AFL++ installed (`apt install afl++` or build from source) - Target binary source code (for compile-time instrumentation) or QEMU mode for binary-only - Initial seed corpus of valid inputs for the target format - Linux system with /proc/sys/kernel/core_pattern configured ## Steps 1. Instrument the target binary with `afl-cc` or `afl-clang-fast` 2. Prepare seed corpus directory with minimal valid inputs 3. Minimize corpus with `afl-cmin` to remove redundant seeds 4. Run `afl-fuzz` with appropriate flags (-i input -o output) 5. Monitor fuzzing progress via afl-whatsup and UI stats 6. Triage crashes with `afl-tmin` minimization and CASR/GDB analysis 7. Report unique crashes with reprod...