miosa-osa/osa · priv/skills/offensive-toctou/SKILL.md

offensive-toctou skillA

offensive-toctou is agent-read markdown (skill) from miosa-osa/osa: 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-cla.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add miosa-osa/osa/offensive-toctou@git:20260913.e13b6b8
Exact content
mdr add miosa-osa/osa/offensive-toctou@sha256:e5fc9d0096211126

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_dknhq473n7hfzsqr.svg)](https://markdownregistry.com/a/art_dknhq473n7hfzsqr)

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Versions

versioncommittedcommitsizeaudit
git:20260913.e13b6b8 latest2026-09-13 e13b6b8 13,974 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (13974 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

miosa-osa/osa · 57 stars · license NOASSERTION · pushed 2026-09-14 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_dknhq473n7hfzsqr
GET https://markdownregistry.com/api/v1/resolve?ref=miosa-osa/osa/offensive-toctou
GET https://markdownregistry.com/api/v1/blob/e5fc9d0096211126d01641497334b283c447696f7d32993c023e42fba2847507

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.