vulnerability-analysis
Identify vulnerability class, analyze root cause, and plan exploitation strategy.
Installation
Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.
View source ↗GuidesSkill instructions
Vulnerability Analysis
Systematic identification and analysis of vulnerabilities in binary targets.
Vulnerability Classes
| Class | Signals | Typical Cause |
|---|---|---|
| Stack BOF | No bounds check on input | gets(), strcpy(), sprintf() |
| Format String | User input as format arg | printf(buf) instead of printf("%s", buf) |
| Heap Corruption | Dynamic allocation + free | UAF, double-free, heap overflow |
| Integer Overflow | Arithmetic on user input | Size calculations, array indexing |
| Race Condition | Multi-threaded or file ops | TOCTOU, signal handlers |
| Logic Bug | Unexpected program state | Auth bypass, incorrect checks |
Analysis Process
- Trace user input - Where does it enter? Where does it go?
- Find sinks - Dangerous functions that consume input
- Check bounds - Are there size limits? Are they enforced?
- Check protections - What mitigations affect exploitation?
Dangerous Function Patterns
// Stack BOF
gets(buf); // No bounds
strcpy(dst, src); // No bounds
sprintf(buf, fmt, ...); // No bounds
scanf("%s", buf); // No bounds
// Format String
printf(user_input); // User controls format
// Command Injection
system(user_input); // Direct command exec
popen(user_input, "r"); // Command exec
Mitigation Bypass Planning
| Have | Need | Strategy |
|---|---|---|
| BOF + NX | Code exec | ROP chain, ret2libc |
| BOF + Canary | Bypass | Leak canary first |
| BOF + PIE | Fixed addr | Leak code address |
| Format + No write | Write primitive | Use %n specifier |
| Heap + no leak | Info leak | Heap feng shui |
Output
Produce context/vulnerability-analysis.md using the template.
Examples
Read the usage examples in the source repository.
View source ↗Source history
- Indexed on
- 2026-01-20
- Index updated
- 2026-02-04
- Branch
- main
Index and sync dates describe this directory. View the source repository for code history.
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