# Security Audit Checklist
## Overview
This comprehensive security audit checklist ensures Caxton maintains robust security posture across all components, from WebAssembly sandboxing to API authentication and resource protection.
## Audit Categories
1. **WebAssembly Sandbox Security**
2. **API Authentication & Authorization**
3. **Resource Exhaustion Protection**
4. **Data Security & Privacy**
5. **Network Security**
6. **Operational Security**
7. **Compliance & Governance**
---
## 1. WebAssembly Sandbox Security
### Isolation Verification
- [ ] **Memory Isolation**
- [ ] Verify linear memory bounds checking
- [ ] Confirm no shared memory between agents
- [ ] Test memory growth limits enforcement
- [ ] Validate stack overflow protection
- [ ] **Capability Restrictions**
- [ ] No filesystem access outside sandbox
- [ ] No network access without explicit permission
- [ ] No system call access
- [ ] No process spawning capability
- [ ] **Resource Limits**
- [ ] CPU time limits enforced
- [ ] Memory limits enforced (default: 100MB)
- [ ] Stack size limits enforced
- [ ] Instruction count limits (gas metering)
### WASM Module Verification
```rust
// Audit code example
pub fn verify_wasm_module(module: &[u8]) -> SecurityAuditResult {
let mut results = SecurityAuditResult::new();
// Check for dangerous imports
let dangerous_imports = [
"fs", "process", "child_process", "net", "dgram"
];
for import in parse_imports(module) {
if dangerous_imports.contains(&import.module) {
results.add_violation(
Severity::Critical,
format!("Dangerous import detected: {}", import.module)
);
}
}
// Verify memory configuration
if let Some(memory) = parse_memory_section(module) {
if memory.initial > MAX_INITIAL_MEMORY {
results.add_violation(
Severity::High,
"Excessive initial memory allocation"
);
}
}
results
}
```
### Sandbox Escape Testing
- [ ] **Known CVE Testing**
- [ ] Test against known WebAssembly CVEs
- [ ] Verify patches for Spectre/Meltdown
- [ ] Test bounds checking bypass attempts
- [ ] **Fuzzing**
- [ ] Fuzz WASM module loader
- [ ] Fuzz host function interfaces
- [ ] Fuzz memory operations
- [ ] **Resource Exhaustion**
- [ ] Test infinite loop handling
- [ ] Test memory bomb prevention
- [ ] Test stack overflow handling
## 2. API Authentication & Authorization
### Authentication Mechanisms
- [ ] **API Key Management**
- [ ] Keys stored securely (never in code)
- [ ] Key rotation implemented
- [ ] Key revocation functional
- [ ] Rate limiting per key
- [ ] **JWT/Token Validation**
- [ ] Signature verification
- [ ] Expiration checking
- [ ] Audience validation
- [ ] Issuer verification
- [ ] **mTLS Implementation**
- [ ] Certificate validation
- [ ] Certificate revocation checking
- [ ] Proper cipher suite selection
- [ ] TLS version >= 1.2
### Authorization Controls
```yaml
# Authorization matrix audit
authorization_matrix:
admin:
- agent:create
- agent:delete
- agent:modify
- system:configure
operator:
- agent:create
- agent:read
- metrics:read
viewer:
- agent:read
- metrics:read
```
- [ ] **RBAC Implementation**
- [ ] Role definitions documented
- [ ] Least privilege principle enforced
- [ ] Role assignment audited
- [ ] Permission inheritance correct
- [ ] **API Endpoint Security**
- [ ] All endpoints require authentication
- [ ] Sensitive operations require additional auth
- [ ] CORS properly configured
- [ ] CSRF protection enabled
### Security Headers
```rust
// Required security headers
pub const SECURITY_HEADERS: &[(&str, &str)] = &[
("X-Content-Type-Options", "nosniff"),
("X-Frame-Options", "DENY"),
("X-XSS-Protection", "1; mode=block"),
("Strict-Transport-Security", "max-age=31536000; includeSubDomains"),
("Content-Security-Policy", "default-src 'self'"),
("Referrer-Policy", "strict-origin-when-cross-origin"),
];
```
## 3. Resource Exhaustion Protection
### Rate Limiting
- [ ] **Request Rate Limiting**
- [ ] Per-IP rate limiting
- [ ] Per-user rate limiting
- [ ] Per-endpoint rate limiting
- [ ] Distributed rate limiting (Redis)
- [ ] **Resource Quotas**
- [ ] Max agents per user
- [ ] Max messages per second
- [ ] Max storage per user
- [ ] Max CPU time per agent
### DoS Protection
```rust
// DoS protection configuration
pub struct DosProtection {
max_connections: usize, // 10000
max_connections_per_ip: usize, // 100
max_request_size: usize, // 10MB
max_header_size: usize, // 8KB
request_timeout: Duration, // 30s
slow_request_threshold: Duration, // 10s
}
```
- [ ] **Connection Limits**
- [ ] Max concurrent connections enforced
- [ ] Connection timeout configured
- [ ] Slow loris protection
- [ ] SYN flood protection
- [ ] **Request Validation**
- [ ] Max request size enforced
- [ ] Max header size enforced
- [ ] Request timeout enforced
- [ ] Body parsing limits
## 4. Data Security & Privacy
### Encryption
- [ ] **Data at Rest**
- [ ] Database encryption enabled
- [ ] File system encryption
- [ ] Backup encryption
- [ ] Key management system (KMS) integrated
- [ ] **Data in Transit**
- [ ] TLS for all external communication
- [ ] TLS for internal services
- [ ] Certificate pinning where appropriate
- [ ] Perfect forward secrecy enabled
### Sensitive Data Handling
```rust
// Sensitive data detection
pub fn audit_sensitive_data(data: &str) -> Vec<SensitiveDataMatch> {
let patterns = [
(r"\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b", "email"),
(r"\b(?:\d{4}[-\s]?){3}\d{4}\b", "credit_card"),
(r"\b\d{3}-\d{2}-\d{4}\b", "ssn"),
(r"(?i)(api[_-]?key|secret|password|token)[\s]*[:=][\s]*['\"]?[\w-]+", "credential"),
];
let mut matches = Vec::new();
for (pattern, data_type) in patterns {
// Check for matches and record
}
matches
}
```
- [ ] **PII Protection**
- [ ] PII identification automated
- [ ] PII encryption enforced
- [ ] PII access logged
- [ ] PII retention policies enforced
- [ ] **Secrets Management**
- [ ] No hardcoded secrets
- [ ] Environment variables used properly
- [ ] Secrets rotation implemented
- [ ] Audit trail for secret access
### GDPR Compliance
- [ ] **Data Subject Rights**
- [ ] Right to access implemented
- [ ] Right to deletion implemented
- [ ] Right to portability implemented
- [ ] Consent management system
- [ ] **Data Processing**
- [ ] Lawful basis documented
- [ ] Data minimization enforced
- [ ] Purpose limitation enforced
- [ ] Data retention automated
## 5. Network Security
### Network Segmentation
```yaml
# Network zones
network_zones:
dmz:
- load_balancer
- api_gateway
application:
- orchestrator
- agent_runtime
data:
- database
- message_queue
management:
- monitoring
- logging
```
- [ ] **Zone Isolation**
- [ ] Firewall rules configured
- [ ] Network ACLs in place
- [ ] Security groups properly configured
- [ ] Private subnets for internal services
- [ ] **Traffic Control**
- [ ] Ingress rules minimized
- [ ] Egress filtering enabled
- [ ] Inter-zone communication restricted
- [ ] VPN for management access
### Communication Security
- [ ] **Service Mesh Security**
- [ ] mTLS between services
- [ ] Service authentication
- [ ] Traffic encryption
- [ ] Circuit breakers configured
- [ ] **Message Queue Security**
- [ ] Queue authentication required
- [ ] Message encryption
- [ ] Access control lists
- [ ] Dead letter queue monitoring
## 6. Operational Security
### Logging and Monitoring
```rust
// Security event logging
pub enum SecurityEvent {
AuthenticationFailure { user: String, ip: IpAddr },
AuthorizationFailure { user: String, resource: String },
SuspiciousActivity { description: String },
SecurityPolicyViolation { policy: String, violator: String },
DataExfiltrationAttempt { user: String, volume: usize },
}
impl SecurityEvent {
pub fn log(&self) {
match self {
SecurityEvent::AuthenticationFailure { .. } => {
// Log with appropriate severity and details
}
// ... other cases
}
}
}
```
- [ ] **Security Logging**
- [ ] Authentication events logged
- [ ] Authorization failures logged
- [ ] Configuration changes logged
- [ ] Data access logged
- [ ] **Log Security**
- [ ] Logs encrypted in transit
- [ ] Logs encrypted at rest
- [ ] Log tampering detection
- [ ] Log retention policies enforced
### Incident Response
- [ ] **Incident Response Plan**
- [ ] Response team identified
- [ ] Escalation procedures documented
- [ ] Communication plan established
- [ ] Recovery procedures tested
- [ ] **Security Monitoring**
- [ ] Real-time threat detection
- [ ] Anomaly detection configured
- [ ] Alert fatigue minimized
- [ ] 24/7 monitoring (if required)
### Patch Management
- [ ] **Vulnerability Management**
- [ ] Regular vulnerability scanning
- [ ] Dependency scanning automated
- [ ] CVE monitoring active
- [ ] Patch testing procedures
- [ ] **Update Procedures**
- [ ] Security update SLA defined
- [ ] Emergency patch process
- [ ] Rollback procedures tested
- [ ] Change management integrated
## 7. Compliance & Governance
### Security Policies
- [ ] **Documentation**
- [ ] Security policy documented
- [ ] Acceptable use policy
- [ ] Data classification policy
- [ ] Incident response policy
- [ ] **Training & Awareness**
- [ ] Security training program
- [ ] Phishing awareness training
- [ ] Secure coding training
- [ ] Regular security updates
### Compliance Frameworks
```yaml
# Compliance mapping
compliance_requirements:
SOC2:
- access_control
- encryption
- monitoring
- incident_response
ISO27001:
- risk_assessment
- asset_management
- access_control
- cryptography
PCI_DSS:
- network_security
- access_control
- regular_testing
- security_policies
```
- [ ] **Regulatory Compliance**
- [ ] GDPR requirements met
- [ ] CCPA requirements met
- [ ] Industry-specific regulations
- [ ] Data residency requirements
- [ ] **Audit Trail**
- [ ] Complete audit logging
- [ ] Audit log integrity
- [ ] Regular audit reviews
- [ ] External audit readiness
## Security Testing Procedures
### Penetration Testing
```bash
# Automated security testing
#!/bin/bash
# OWASP ZAP scan
docker run -t owasp/zap2docker-stable zap-baseline.py \
-t https://caxton.example.com \
-r security-report.html
# Nmap service discovery
nmap -sV -sC -O -p- target.example.com
# SQLMap for injection testing
sqlmap -u "https://api.example.com/agents?id=1" \
--batch --random-agent
# Nikto web scanner
nikto -h https://caxton.example.com
```
### Security Scanning
- [ ] **Static Analysis (SAST)**
- [ ] Code scanning enabled
- [ ] Secret scanning enabled
- [ ] Dependency scanning enabled
- [ ] License compliance scanning
- [ ] **Dynamic Analysis (DAST)**
- [ ] API security testing
- [ ] Web application scanning
- [ ] Container scanning
- [ ] Infrastructure scanning
### Security Metrics
```rust
pub struct SecurityMetrics {
pub vulnerabilities_open: u32,
pub mean_time_to_remediate: Duration,
pub security_incidents: u32,
pub false_positive_rate: f64,
pub coverage_percentage: f64,
}
impl SecurityMetrics {
pub fn calculate_risk_score(&self) -> f64 {
// Risk scoring algorithm
}
}
```
## Remediation Priority Matrix
| Critical | External | 24 hours | Emergency patch |
| Critical | Internal | 48 hours | Urgent fix |
| High | External | 1 week | Priority fix |
| High | Internal | 2 weeks | Scheduled fix |
| Medium | Any | 30 days | Normal fix |
| Low | Any | 90 days | Backlog |
## Security Review Schedule
### Daily
- Monitor security alerts
- Review authentication failures
- Check resource usage anomalies
### Weekly
- Review access logs
- Update threat intelligence
- Patch assessment
### Monthly
- Security metrics review
- Vulnerability scan
- Access review
- Certificate expiration check
### Quarterly
- Penetration testing
- Security training
- Policy review
- Compliance audit
### Annually
- Full security audit
- Disaster recovery test
- Security architecture review
- Third-party assessment
## References
- [ADR-0002: WebAssembly for Agent Isolation](../adr/0002-webassembly-for-agent-isolation.md)
- [OWASP Top 10](https://owasp.org/www-project-top-ten/)
- [NIST Cybersecurity Framework](https://www.nist.gov/cyberframework)
- [CIS Controls](https://www.cisecurity.org/controls)