mirror of
https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
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Mahipal
2fb6a9faff
Each rewritten description now states both what the skill does (concrete capability, named tools/artifacts) and an explicit when-to-use trigger, improving agent discovery/activation. Grounded in each skill's own body; changes confined to the `description` field only (bodies and all other frontmatter untouched). Produced by a gated audit->rewrite->recheck loop (548 -> 0 flagged) with a sampled anti-invention check (0 ungrounded). Schema: 817/817 pass. Framework-ID gate: 0 defects.
88 lines
2.5 KiB
Markdown
88 lines
2.5 KiB
Markdown
---
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name: performing-fuzzing-with-aflplusplus
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description: 'Performs coverage-guided fuzzing of compiled binaries with AFL++, instrumenting
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targets via afl-cc/afl-clang-fast, minimizing corpora with afl-cmin and afl-tmin,
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running parallel campaigns with afl-fuzz, and triaging crashes with CASR or GDB
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scripts. Use for binary fuzzing, crash and memory-corruption discovery, coverage-guided
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testing, or running AFL++ fuzzing campaigns.
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'
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domain: cybersecurity
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subdomain: application-security
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tags:
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- fuzzing
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- aflplusplus
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- coverage-guided
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- crash-triage
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- binary-analysis
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- security-testing
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version: '1.0'
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author: mahipal
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license: Apache-2.0
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nist_ai_rmf:
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- MEASURE-2.7
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- MAP-5.1
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- MANAGE-2.4
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atlas_techniques:
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- AML.T0070
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- AML.T0066
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- AML.T0082
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nist_csf:
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- PR.PS-01
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- PR.PS-04
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- ID.RA-01
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- PR.DS-10
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mitre_attack:
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- T1078
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- T1190
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- T1059
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- T1005
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---
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# Performing Fuzzing with AFL++
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## Overview
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AFL++ is a community-maintained fork of American Fuzzy Lop (AFL) that provides coverage-guided
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fuzzing for compiled binaries. It instruments targets at compile time or via QEMU/Unicorn mode
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for binary-only fuzzing, then mutates input corpora to discover new code paths. AFL++ includes
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advanced scheduling (MOpt, rare), custom mutators, CMPLOG for input-to-state comparison solving,
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and persistent mode for high-throughput fuzzing.
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## When to Use
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- When conducting security assessments that involve performing fuzzing with aflplusplus
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- When following incident response procedures for related security events
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- When performing scheduled security testing or auditing activities
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- When validating security controls through hands-on testing
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## Prerequisites
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- AFL++ installed (`apt install afl++` or build from source)
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- Target binary source code (for compile-time instrumentation) or QEMU mode for binary-only
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- Initial seed corpus of valid inputs for the target format
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- Linux system with /proc/sys/kernel/core_pattern configured
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## Steps
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1. Instrument the target binary with `afl-cc` or `afl-clang-fast`
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2. Prepare seed corpus directory with minimal valid inputs
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3. Minimize corpus with `afl-cmin` to remove redundant seeds
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4. Run `afl-fuzz` with appropriate flags (-i input -o output)
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5. Monitor fuzzing progress via afl-whatsup and UI stats
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6. Triage crashes with `afl-tmin` minimization and CASR/GDB analysis
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7. Report unique crashes with reproduction steps
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## Expected Output
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```
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+++ Findings +++
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unique crashes: 12
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unique hangs: 3
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last crash: 00:02:15 ago
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+++ Coverage +++
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map density: 4.23% / 8.41%
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paths found: 1847
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exec speed: 2145/sec
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```
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