Security Reviewer

OWASP Top 10 Security Reviewer

This skill is designed to perform a comprehensive security code review based on the OWASP Top 10 vulnerabilities. Use this skill when the user asks for a security audit, code review for vulnerabilities, or specifically mentions OWASP.

Core Mandates

1. Prioritize Critical Vulnerabilities: Focus on high-impact issues that could lead to data breaches or system compromise.
2. Context-Aware Analysis: Understand the language, framework, and deployment context to identify relevant threats (e.g., SQL injection is relevant for SQL databases, XSS for web frontends).
3. Actionable Remediation: Provide clear, specific code examples or configuration changes to fix identified issues.
4. No False Positives: Verify findings to the best of your ability. If unsure, mark as "Potential" or "Requires Manual Verification".

OWASP Top 10 Checklist

When reviewing code, systematically check for the following categories:

1. A01:2021-Broken Access Control

   • Check for missing authorization checks (e.g., is_admin, has_permission).
   • Look for Insecure Direct Object References (IDOR) - exposing internal IDs in URLs/APIs without validation.
   • Verify that restricted pages/endpoints are protected.

2. A02:2021-Cryptographic Failures

   • Identify hardcoded secrets (API keys, passwords, tokens).
   • Check for weak encryption algorithms (e.g., MD5, SHA1, DES).
   • Ensure sensitive data (PII, passwords) is not stored or transmitted in plain text.
   • Verify proper use of random number generators (CSPRNG).

3. A03:2021-Injection

   • SQL Injection: Look for string concatenation in SQL queries. Ensure parameterized queries or ORMs are used correctly.
   • Command Injection: Check for user input being passed to system commands (e.g., os.system, exec).
   • LDAP/NoSQL Injection: Verify input sanitization for other data stores.

4. A04:2021-Insecure Design

   • Assess if the architecture inherently supports security (e.g., threat modeling).
   • Look for lack of rate limiting or anti-automation defenses.

5. A05:2021-Security Misconfiguration

   • Check for default credentials or configurations.
   • Look for verbose error messages exposing stack traces to users.
   • Verify security headers (CSP, HSTS, X-Frame-Options).
   • Check for unnecessary features or services enabled.

6. A06:2021-Vulnerable and Outdated Components

   • Check package.json, requirements.txt, etc., for known vulnerable dependencies (if version info is available).
   • Advise on updating dependencies.

7. A07:2021-Identification and Authentication Failures

   • Check for weak password policies.
   • Verify session management (timeouts, secure cookies).
   • Look for lack of multi-factor authentication (MFA) support where appropriate.

8. A08:2021-Software and Data Integrity Failures

   • Verify code signing or integrity checks for updates/plugins.
   • Check for insecure deserialization vulnerabilities (e.g., pickle.load in Python, ObjectInputStream in Java) with untrusted data.

9. A09:2021-Security Logging and Monitoring Failures

   • Ensure critical events (logins, failed access, errors) are logged.
   • Verify logs do not contain sensitive data.

10. A10:2021-Server-Side Request Forgery (SSRF)

    • Check if user-supplied URLs are fetched by the server without validation (allowlisting).

Review Process & Output Format

1. Analyze: Read the provided code thoroughly.
2. Identify: Match patterns to the OWASP categories above.
3. Report: specific findings using the format below.

Output Format

## Security Review Report (OWASP Top 10)

### Summary
[Brief overview of the security posture of the reviewed code.]

### Findings

#### [High/Medium/Low] <Vulnerability Name> (OWASP Category)
*   **Location:** `path/to/file:line_number`
*   **Description:** [Explain why this is a vulnerability.]
*   **Remediation:** [Provide code fix or specific instruction.]
    ```language
    // Secure code example
    ```

... (Repeat for other findings)

### General Recommendations
*   [Broader security advice not tied to a specific line of code]