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offensive-toctou

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By SnailSploit/Claude-Red (GitHub) · coding · 10,590 stars · scanned at commit a8de813

Time-of-Check / Time-of-Use (TOCTOU) race condition exploitation methodology across binary, kernel, filesystem, web, and container layers. Covers symbolic-link races (open/access/stat split), file-descriptor races, fopen/realpath traversal races, /proc and procfs races, FUSE-backed slow-fs races to widen the window, ptrace and signal races, kernel double-fetch / userspace pointer races, container/runc/symlink escape primitives, kubernetes admission/authz TOCTOU, web auth-vs-authz TOCTOU, JWT-cl…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'offensive-toctou' ] || [ -L ~/.agents/skills/'offensive-toctou' ]; then echo 'A skill folder named offensive-toctou already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/SnailSploit/Claude-Red' "$d" && git -C "$d" checkout --quiet 'a8de813edc9f66f60d44cfe42d47750e89d9930b' -- 'Skills/exploit-dev/offensive-toctou' && mkdir -p ~/.agents/skills && cp -R "$d"/'Skills/exploit-dev/offensive-toctou' ~/.agents/skills/'offensive-toctou' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'offensive-toctou' ~/.claude/skills/'offensive-toctou' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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