ctf-source-audit

Trace inputs to dangerous sinks in CTF challenge source code.

1.6k|234|Updated Dec 7, 2019
One-click install
npx skills add https://github.com/wgpsec/AboutSecurity --skill ctf-source-audit
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: ctf-source-audit
Source: https://github.com/wgpsec/AboutSecurity/tree/main/skills/ctf/ctf-source-audit
Command: npx skills add https://github.com/wgpsec/AboutSecurity --skill ctf-source-audit

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps security researchers and CTF players quickly locate intentionally planted vulnerabilities in short challenge source code, reducing time spent on noisy manual review and improving hit rate on flag recovery.

Core Features & Use Cases

  • Language & framework detection: quickly classify PHP, Python, Node.js, Java code paths to focus auditing efforts.
  • Dangerous-function catalog: detailed lists of sinks and common CTF patterns per language to accelerate triage.
  • Sink-to-source dataflow tracing: guide investigators to trace user-controlled inputs to dangerous functions and identify bypasses.
  • Exploit construction & reporting: produce concise exploit steps, payload examples, and flag retrieval paths for CTF scoring.
  • Use Case: when a challenge includes leaked .git, .bak, or /proc/self/environ artifacts, use this Skill to find the minimal path to a flag.

Quick Start

Analyze the provided challenge source and list dangerous sinks, their potential sources, and a reproducible exploit to retrieve the flag.

Frequently Asked Questions about ctf-source-audit

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find vulnerabilities in CTF source code quickly?

To find vulnerabilities in CTF source code, identify dangerous sinks and trace user-controlled inputs to them. This approach detects intentionally seeded flaws across PHP, Python, Node.js, and Java, providing actionable findings, dataflow paths, and exploit payloads to retrieve flags.

What is the best way to audit leaked challenge artifacts like .git or .bak files?

Auditing leaked challenge artifacts like .git or .bak files involves classifying language paths and tracing dataflow to dangerous functions. This process highlights the minimal path to a flag by pinpointing vulnerable file locations and constructing reproducible exploit steps.

Can I use source code review to detect CTF flaws across multiple programming languages?

Yes, source code review can detect CTF flaws across multiple programming languages by using a dangerous-function catalog. It quickly classifies PHP, Python, Node.js, and Java code paths to focus auditing efforts and identify common CTF patterns and bypasses.

How does sink-to-source dataflow tracing work for vulnerability discovery?

Sink-to-source dataflow tracing works by locating dangerous functions and mapping user-controlled inputs back to them. This mechanism guides investigators to identify bypasses and produce concise exploit steps, payload examples, and flag retrieval paths for CTF scoring.

What are the limitations of source auditing for CTF challenges?

A limitation of source auditing for CTF challenges is that it is applicable primarily to short repositories and leaked artifacts. It targets intentionally seeded flaws and exposed files, meaning it may not be effective for complex applications without clear source-to-sink dataflows.