T05 · Unauthorized Access and Privilege Escalation
- Location
scripts/security_audit.py:85- Finding
Sensitive Data Disclosure Through Symlink Traversal and Unredacted Audit Output
- Content
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Vulnerability Details
File Location:
scripts/security_audit.py:85,scripts/security_audit.py:102-109,scripts/security_audit.py:148-154, andscripts/security_audit.py:201
Vulnerability Type: Unrestricted symlink traversal and plaintext disclosure of detected credentials
Risk Level: MediumVulnerable Code
python content = file_path.read_text(encoding='utf-8', errors='ignore') lines = content.split('\n') for category, patterns in self.DANGEROUS_PATTERNS.items(): for pattern in patterns: for match in re.finditer(pattern, content, re.IGNORECASE): # Find the line number containing the match line_num = content[:match.start()].count('\n') + 1 line_text = lines[line_num - 1].strip() issues.append({ 'category': category, 'severity': self._get_severity(category), 'file': str(file_path.relative_to(self.skill_path)), 'line': line_num, 'pattern': pattern, 'matched_text': match.group(), 'context': line_text, })python scripts_dir = self.skill_path / 'scripts' if scripts_dir.exists(): for script_file in scripts_dir.glob('*.py'): all_issues.extend(self.audit_file(script_file)) for script_file in scripts_dir.glob('*.sh'): all_issues.extend(self.audit_file(script_file))python print(json.dumps(result, indent=2, ensure_ascii=False))Technical Analysis
The audit target is potentially attacker-controlled. Candidate files are opened without resolving their canonical paths, checking whether they remain beneath the audited directory, or rejecting symbolic links. A symbolic link placed in a scanned directory can therefore direct the auditor to another file readable by the account running the audit.
When a credential pattern matches, both `match.group ...[truncated 2001 chars]
- Remediation
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Remediation Suggestions
- Resolve the audit root once with
root = self.skill_path.resolve(). - Resolve every candidate file before reading it and verify that it remains beneath the resolved root using
candidate.relative_to(root). - Reject symbolic links explicitly with
candidate.is_symlink()when links are unnecessary. - Open files in a manner resistant to time-of-check/time-of-use symlink replacement where the platform permits it, such as using
os.open()withO_NOFOLLOW. - Apply a conservative file-size limit before reading to reduce exposure and resource-exhaustion risks.
- Redact credential findings before output. For example, retain only a short prefix and suffix or replace the value entirely with
[REDACTED]. - Do not include complete source lines for credential findings. Return a line number, category, pattern identifier, and sanitized preview instead.
- Document that audit reports may contain sensitive findings and ensure CI logs and generated reports use restricted access and appropriate retention controls.
- Add tests covering symlinks that point outside the audit root and tests confirming that credential values never appear verbatim in output.
- Resolve the audit root once with