# Security Review Process
**Document Version:** 1.0
**Last Updated:** 2025-12-11
**Classification:** Public
**Applicable Standards:** ISO 27001, OWASP Code Review, Rust Security Guidelines
## Executive Summary
pg_tviews implements a comprehensive security review process to ensure all code changes maintain the security posture of the project. This process applies to all contributors and covers code reviews, testing, documentation, and approval workflows.
## When Security Review is Required
### Mandatory Security Review
Security review is **REQUIRED** for all changes that:
#### Code Changes
- ✅ **Unsafe Rust code** - Any use of `unsafe` blocks or FFI
- ✅ **Cryptographic operations** - Hashing, signing, encryption
- ✅ **Authentication/authorization** - User access control logic
- ✅ **Input parsing/validation** - User input processing
- ✅ **SQL query construction** - Dynamic SQL or query building
- ✅ **Memory management** - Custom allocators or memory handling
- ✅ **Network operations** - HTTP clients, external API calls
- ✅ **File system access** - Reading/writing files or directories
#### Configuration Changes
- ✅ **Security settings** - Authentication, encryption, access control
- ✅ **Dependency updates** - New crates or version changes
- ✅ **Build configuration** - Compiler flags, linking options
- ✅ **CI/CD pipelines** - Build, test, or deployment changes
#### Documentation Changes
- ✅ **Security documentation** - Policies, procedures, guidelines
- ✅ **API documentation** - Function behavior and security implications
- ✅ **Configuration guides** - Security settings and best practices
### Recommended Security Review
Security review is **RECOMMENDED** for:
- Large refactoring changes (>500 lines)
- New feature implementations
- Performance-critical code paths
- Error handling improvements
- Logging and audit functionality
## Security Review Checklist
### Code Review Criteria
#### Memory Safety & Rust Security
- [ ] **No unsafe code** without explicit justification and audit
- [ ] **All unsafe blocks** are documented with safety reasoning
- [ ] **Bounds checking** is enforced (no unchecked array access)
- [ ] **No raw pointers** or manual memory management
- [ ] **Resource leaks** are prevented (RAII patterns used)
- [ ] **Integer overflow** protection is in place
- [ ] **Type safety** is maintained throughout
#### Input Validation & Sanitization
- [ ] **All user inputs** are validated and sanitized
- [ ] **SQL injection** prevention (parameterized queries only)
- [ ] **Buffer overflows** are prevented (safe string handling)
- [ ] **Path traversal** attacks are blocked
- [ ] **Command injection** is prevented
- [ ] **Type confusion** is avoided (strong typing)
- [ ] **Input size limits** are enforced
#### Authentication & Authorization
- [ ] **Access controls** follow principle of least privilege
- [ ] **Authentication** is properly implemented
- [ ] **Authorization** checks are enforced
- [ ] **Session management** is secure (if applicable)
- [ ] **Password handling** follows best practices
- [ ] **Token security** is maintained
#### Cryptography & Security
- [ ] **Cryptographic algorithms** are current and secure
- [ ] **Key management** follows best practices
- [ ] **Random number generation** uses cryptographically secure sources
- [ ] **Certificate validation** is properly implemented
- [ ] **TLS configuration** is secure
- [ ] **Secrets** are not hardcoded or logged
#### Error Handling & Logging
- [ ] **Sensitive information** is not leaked in error messages
- [ ] **Error handling** doesn't introduce security issues
- [ ] **Logging** doesn't expose confidential data
- [ ] **Debug information** is not enabled in production
- [ ] **Stack traces** don't reveal sensitive information
#### SQL & Database Security
- [ ] **SQL injection** is prevented (parameterized queries)
- [ ] **Schema-qualified names** are used
- [ ] **Access controls** are enforced at database level
- [ ] **Row Level Security** (RLS) is properly implemented
- [ ] **Audit logging** captures security-relevant events
- [ ] **Connection security** is maintained
### Testing Requirements
#### Security Test Cases
- [ ] **Input fuzzing** for parsing functions
- [ ] **Boundary testing** for buffer operations
- [ ] **Negative test cases** for invalid inputs
- [ ] **Race condition testing** for concurrent operations
- [ ] **Resource exhaustion** testing
- [ ] **Privilege escalation** attempts
#### Code Quality Checks
- [ ] **Clippy lints** pass with security warnings
- [ ] **Rust security advisories** checked (cargo-audit)
- [ ] **Dependency vulnerabilities** assessed
- [ ] **Code coverage** includes security-critical paths
- [ ] **Static analysis** tools pass
#### Integration Testing
- [ ] **End-to-end security** workflows tested
- [ ] **PostgreSQL security** features validated
- [ ] **TVIEW access controls** verified
- [ ] **Audit logging** functionality confirmed
### Documentation Requirements
#### Security Documentation
- [ ] **Security implications** of changes documented
- [ ] **Threat model** updated if applicable
- [ ] **User-facing security** guidance provided
- [ ] **Configuration security** settings documented
- [ ] **Troubleshooting** security issues covered
#### Code Documentation
- [ ] **Function contracts** specify security requirements
- [ ] **Unsafe code** has detailed safety comments
- [ ] **Security assumptions** are clearly stated
- [ ] **Error conditions** and security implications noted
## Security Approval Workflow
### Pull Request Process
#### 1. Automated Checks
- **CI Pipeline**: Security tests and scans run automatically
- **Code Quality**: Clippy and rustfmt checks pass
- **Vulnerability Scan**: cargo-audit passes
- **Dependency Check**: cargo-vet audits pass
#### 2. Self-Review
- **Developer Checklist**: All security criteria reviewed
- **Test Coverage**: Security test cases added
- **Documentation**: Security implications documented
#### 3. Peer Review
- **Code Review**: At least one maintainer reviews
- **Security Focus**: Security implications explicitly addressed
- **Testing**: Security tests validated
#### 4. Security Review (if required)
- **Security Champion**: Designated security reviewer
- **Threat Analysis**: Security impact assessment
- **Risk Assessment**: Residual risk evaluation
- **Approval**: Explicit security sign-off
### Approval Requirements
#### Standard Changes
- **1 maintainer approval** for routine changes
- **Tests pass** and security checks clear
- **Documentation updated** as needed
#### Security-Critical Changes
- **2 maintainer approvals** required
- **Security review completed** and approved
- **Additional testing** performed
- **Security advisory** prepared if needed
#### Unsafe Code Changes
- **Explicit security sign-off** required
- **Safety justification** documented
- **Audit trail** maintained
- **Testing** includes unsafe code paths
## Security Review Tools
### Automated Tools
```bash
# Code quality and security linting
cargo clippy -- -D warnings
# Vulnerability scanning
cargo audit
# Dependency auditing
cargo vet check
# Fuzz testing (if applicable)
cargo fuzz run [target]
# Memory safety checking
valgrind --leak-check=full ./target/debug/pg_tviews_test
```
### Manual Review Tools
#### Code Analysis
- **Unsafe code audit**: Review all `unsafe` blocks
- **Input validation review**: Check all user inputs
- **SQL injection review**: Verify parameterized queries
- **Access control review**: Validate authorization logic
#### Testing Tools
- **Security test suite**: Run comprehensive security tests
- **Integration testing**: End-to-end security validation
- **Performance testing**: Security under load conditions
- **Negative testing**: Invalid input handling
## Common Security Issues
### Memory Safety Issues
- **Buffer overflows**: Use safe string/vector operations
- **Use-after-free**: Rely on Rust ownership system
- **Double-free**: RAII patterns prevent this
- **Uninitialized memory**: Rust prevents uninitialized access
### Input Validation Issues
- **SQL injection**: Always use parameterized queries
- **XSS**: Input sanitization (though rare in PostgreSQL extensions)
- **Path traversal**: Validate and sanitize file paths
- **Command injection**: Avoid shell command execution
### Access Control Issues
- **Privilege escalation**: Enforce least privilege
- **IDOR**: Proper authorization checks
- **Broken authentication**: Secure session management
- **Insecure defaults**: Secure by default configuration
## Security Training Requirements
### Contributor Requirements
All contributors must:
- [ ] Complete security awareness training
- [ ] Understand secure coding practices
- [ ] Know incident reporting procedures
- [ ] Review security documentation
### Reviewer Requirements
Security reviewers must:
- [ ] Have security review training
- [ ] Understand common vulnerabilities
- [ ] Know regulatory requirements
- [ ] Maintain security certifications
## Metrics and Monitoring
### Security Review Metrics
- **Review Coverage**: Percentage of changes with security review
- **Review Time**: Average time for security review completion
- **Defect Detection**: Security issues found during review
- **False Positives**: Incorrect security flags
### Quality Metrics
- **Security Test Coverage**: Percentage of code with security tests
- **Vulnerability Remediation**: Time to fix security issues
- **Audit Compliance**: Percentage of requirements met
- **Training Completion**: Security training completion rates
## Continuous Improvement
### Process Updates
Security review process is updated:
- After security incidents
- When new vulnerability patterns emerge
- Based on industry best practice changes
- Following regulatory requirement updates
### Tool Updates
Security tools are kept current:
- Clippy and Rust toolchain updates
- cargo-audit database updates
- New security testing tools evaluation
- Automated tool configuration improvements
### Training Updates
Security training is refreshed:
- Annual security awareness updates
- New threat vector training
- Tool and process training
- Incident response training
## Escalation Procedures
### Security Issue Escalation
If security concerns are found during review:
1. **Stop the Merge**: Do not merge until resolved
2. **Escalate Immediately**: Contact security team
3. **Document Issue**: Create security advisory if needed
4. **Fix and Retest**: Implement security fix
5. **Re-review**: Complete security review process
### Process Issue Escalation
If review process issues are identified:
1. **Document Problem**: Record process gaps
2. **Escalate to Maintainers**: Request process improvement
3. **Implement Fix**: Update procedures and documentation
4. **Retrain Team**: Provide additional training if needed
## References
- [Rust Security Guidelines](https://www.rust-lang.org/static/pdfs/Rust-security.pdf)
- [OWASP Code Review Guide](https://owasp.org/www-pdf-archive/OWASP_Code_Review_Guide_v2.pdf)
- [Microsoft SDL](https://www.microsoft.com/en-us/security/blog/2019/05/14/sdl-migration/)
- [CERT Secure Coding](https://wiki.sei.cmu.edu/confluence/display/seccode/SEI+CERT+Coding+Standards)
- [PostgreSQL Security](https://www.postgresql.org/docs/current/security.html)
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**Document Control:**
- **Author**: Lionel Hamayon
- **Reviewers**: Project Contributors
- **Review Cycle**: Annual
- **Distribution**: Public