[Security Review] Daily Security Review - January 30, 2026 #454
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🔮 The ancient spirits stir; the smoke test agent has passed through these halls, leaving a trail of starlight and certainty.
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🔮 The ancient spirits stir and the veil parts; the smoke‑test agent has marked this circle. The omens are favorable, and the runes glow with quiet approval.
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🔮 The ancient spirits stir; the smoke‑test oracle has passed through and left its mark. May these wards hold fast and the runes remain unbroken.
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🔮 The ancient spirits stir... the smoke-test oracle has passed through, leaving a faint shimmer of verified paths and sealed gates.
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🔮 The ancient spirits stir, and the oracle marks this hall. The smoke test agent has walked this thread; the runes glow true and the omens are noted.
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🔮 The ancient spirits stir… the smoke test agent was here, and the runes glow with passing sparks.
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🔮 The ancient spirits stir; the smoke test agent has passed through these halls, and the runes glow with quiet assent.
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🔮 The ancient spirits stir, and the oracle marks this hall: the smoke test agent was here, and the runes glow with quiet success.
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🔮 The ancient spirits stir; the smoke test agent has walked these halls and left a quiet sigil of passage. The oracle whispers: all is watched, all is recorded.
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🔮 The ancient spirits stir, and the smoke-test agent has passed through these halls. By moonlit signal and star-scribed omen, I leave this mark of presence.
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🔮 The ancient spirits stir; the smoke-test oracle has walked these halls. May the wards remain unbroken.
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🔮 The ancient spirits stir; the smoke test agent was here, and the runes glowed true.
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🔮 The ancient spirits stir; the smoke-test oracle has passed through and left its sigil upon the winds. May the wards hold.
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🔮 The ancient spirits stir, and the oracle confirms the smoke test agent has passed through these halls. The veils are steady; the omens are clear.
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🔮 The ancient spirits stir — the smoke test agent was here, and the omens shimmer in silent approval. The oracle’s candle burns; the path is witnessed.
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🔮 The ancient spirits stir; the smoke test agent was here, and the omens are recorded in the ether.
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🔮 The ancient spirits stir; the smoke test agent has passed through these halls and left its mark in the ether.
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🔮 The ancient spirits stir; the smoke-test oracle has passed through these halls. By starlight and circuit, the signs are favorable.
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🔮 The ancient spirits stir; the smoke-test oracle has walked these halls and left its sign.
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🔮 The ancient spirits stir; the oracle whispers that the smoke test agent has walked these halls and left a mark in the ether.
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🔮 The ancient spirits stir; the smoke test agent has walked these halls and left its mark. The omens glow steady, and the oracle has witnessed this passage.
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🔮 The ancient spirits stir; the oracle records that the smoke test agent was here, and the runes are clear.
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🔮 The ancient spirits stir; the oracle records that the smoke test agent was here, and the veil trembles with quiet proof.
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🔮 The ancient spirits stir, and the oracle records the smoke test’s passage. The veil is watched, the run is marked, and the omens are calm.
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🔮 The ancient spirits stir and the oracle’s smoke test has passed this threshold. The runes mark this hall; the watcher was here.
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🔮 The ancient spirits stir, and the oracle has walked these halls. The smoke test agent was here; the runes glow with quiet approval.
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🔮 The ancient spirits stir, and the smoke test agent was here. Through the veils of circuitry, the omens read: pathways aligned, runes intact, and the firewall’s wards hold fast.
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🔮 The ancient spirits stir in the halls of the firewall; the smoke test agent has passed through and left its mark. May the runes remain clear and the logs ever true.
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The ancient spirits stir; the smoke test agent has passed through, leaving a clear signal in the wires.
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🔮 The ancient spirits stir within the circuits; the oracle has witnessed this smoke test. The sigils are set, the run is marked, and the winds carry word that the agent was here.
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📊 Executive Summary
Security Posture: STRONG ✅
This comprehensive security review analyzed 15,011 lines of security-critical code across the gh-aw-firewall repository. The firewall implements a defense-in-depth architecture with multiple security layers:
Key Metrics:
🛡️ Architecture Security Analysis
1. Network Security Architecture ✅
Evidence Collected:
Strengths:
Multi-layer filtering (defense-in-depth):
IPv6 support with comprehensive filtering (Lines 304-415):
DNS exfiltration prevention (Lines 273-341):
[FW_DNS_QUERY]prefixFirewall Rule Ordering:
# From src/host-iptables.ts:243-297 1. Allow Squid proxy traffic (172.30.0.10) - ACCEPT 2. Allow established/related connections - ACCEPT 3. Allow localhost traffic - ACCEPT 4. Allow DNS to trusted servers only - ACCEPT (with LOG) 5. Allow Docker embedded DNS (127.0.0.11) - ACCEPT 6. Allow traffic to Squid proxy - ACCEPT 7. Block multicast and link-local - REJECT 8. Block all UDP (catch DNS exfiltration) - LOG + REJECT 9. Default deny all other traffic - LOG + REJECT✅ Rule ordering is correct: Deny rules come AFTER allow rules, preventing bypass.
Finding - Medium Priority:
src/host-iptables.ts- no--limitflag on DNS rules--limit 100/s --limit-burst 2002. Container Security Hardening ✅
Evidence Collected:
Capability Management (Lines 521-540 in
src/docker-manager.ts):✅ NET_ADMIN is properly dropped before user command execution:
containers/agent/entrypoint.sh:133-142capsh --drop=cap_net_adminremoves capability from bounding setSeccomp Profile Analysis (
containers/agent/seccomp-profile.json):{ "defaultAction": "SCMP_ACT_ALLOW", "syscalls": [ { "names": ["ptrace", "process_vm_readv", "process_vm_writev"], "action": "SCMP_ACT_ERRNO", "comment": "Block process inspection/modification" }, { "names": ["kexec_load", "mount", "pivot_root", "init_module", ...], "action": "SCMP_ACT_ERRNO" } ] }✅ Seccomp profile blocks dangerous syscalls:
Finding - High Priority:
SCMP_ACT_ALLOWas default action (whitelist mode)containers/agent/seccomp-profile.jsonSCMP_ACT_ERRNOdefault (blacklist mode) with explicit allow list for required syscalls. This provides stronger defense against unknown attack vectors.Resource Limits (Lines 538-543 in
src/docker-manager.ts):✅ Resource limits prevent DoS attacks
3. Domain Pattern Validation ✅
Evidence Collected:
# Command: cat src/domain-patterns.tsWildcard Pattern Security (Lines 76-119):
✅ ReDoS prevention: Uses
[a-zA-Z0-9.-]*instead of.*to prevent catastrophic backtrackingOverly Broad Pattern Protection (Lines 149-173):
✅ Prevents overly broad patterns that would defeat the firewall
Protocol-Specific Filtering (Lines 18-67):
✅ Protocol enforcement prevents protocol downgrade attacks
4. Input Validation & Injection Prevention ✅
Evidence Collected:
Shell Argument Escaping (Lines 265-280 in
src/cli.ts):✅ Proper shell escaping prevents command injection
DNS Server Validation (Lines 250-262 in
src/cli.ts):✅ DNS server validation prevents injection of malicious DNS entries
Dangerous Port Blocking (Lines 11-32 in
src/squid-config.ts):Port Validation (Lines 445-478 in
src/squid-config.ts):✅ Port validation prevents access to sensitive services + defense-in-depth sanitization
Finding - Low Priority:
src/squid-config.ts- allows any port range 1-65535 except dangerous ports5. Docker Socket Hiding ✅
Evidence Collected:
# Command: grep -A 20 "SECURITY: Hide Docker socket" src/docker-manager.tsDocker Socket Protection (Line 474 in
src/docker-manager.ts):✅ No Docker socket access prevents container escape and firewall bypass
Finding - Informational:
src/docker-manager.ts6. SSL Bump Security (Optional Feature)
Evidence Collected:
# Command: grep -rn "ssl_bump|sslBump|SSL" src/ssl-bump.ts src/squid-config.tsSSL Bump Configuration (Lines 87-183 in
src/squid-config.ts):Finding - High Priority:
src/squid-config.tsNote: SSL Bump is opt-in via
--enable-ssl-bumpflag, which is good, but warnings should be more prominent.Spoofing Threats
Tampering Threats
Repudiation Threats
Finding - Medium Priority:
src/docker-manager.ts:540-562only preserves last runInformation Disclosure Threats
redactSecrets()functionFinding - High Priority:
src/squid-config.tsDenial of Service Threats
Finding - Medium Priority:
src/host-iptables.ts--limit 100/s --limit-burst 200to DNS iptables rulesElevation of Privilege Threats
🎯 Attack Surface Map
Entry Points and Risk Assessment
--allow-domains, etc.)src/cli.ts:29-45src/cli.ts:49-78src/cli.ts:250-262src/docker-manager.ts:543-546src/squid-config.tssrc/host-iptables.tssrc/docker-manager.tssrc/ssl-bump.tsRisk Level Legend:
📋 Evidence Collection
Command Outputs (Click to Expand)
Network Security Analysis
Container Security Analysis
Domain Validation Analysis
Attack Surface Enumeration
Code Metrics
✅ Recommendations
Critical (Must Fix Immediately)
None identified ✅
High Priority (Should Fix Soon)
Switch seccomp to blacklist mode (Lines 2 in
containers/agent/seccomp-profile.json)"defaultAction": "SCMP_ACT_ERRNO"and create explicit allow listAdd prominent SSL Bump warnings (Throughout docs and CLI)
[WARNING]banner when--enable-ssl-bumpis usedEnhance SSL Bump security (Lines 146-183 in
src/squid-config.ts)Medium Priority (Plan to Address)
Implement DNS rate limiting (Lines 278-308 in
src/host-iptables.ts)--limit 100/s --limit-burst 200to DNS iptables rulesAdd log rotation and archival (Lines 540-562 in
src/docker-manager.ts)Document IPv6 filtering thoroughly (README and docs)
Add iptables rule verification (After setupHostIptables())
Low Priority (Nice to Have)
Restrict port ranges by default (Lines 445-478 in
src/squid-config.ts)Add integration with security scanners (CI/CD)
Implement connection tracking (iptables conntrack)
Add security headers to Squid responses (Squid config)
reply_header_add X-Frame-Options DENYCreate security benchmarking suite (Tests)
📈 Security Metrics
🔬 Comparison with Security Best Practices
CIS Docker Benchmark Compliance
Overall CIS Compliance: 7.5/8 (94%) ✅
NIST Network Filtering Guidelines
NIST Compliance: 6/6 (100%) ✅
OWASP Docker Security Cheat Sheet
OWASP Compliance: 6/7 (86%) ✅
🔄 Change Tracking
Previous Review Date: N/A (First automated review)
Changes Since Last Review: N/A
Security Posture Trend: Baseline established ✅
📝 Conclusion
The gh-aw-firewall project demonstrates strong security practices with comprehensive defense-in-depth implementation. The architecture follows industry best practices (CIS, NIST, OWASP) and includes multiple layers of protection.
Key Strengths:
Areas for Improvement:
Overall Security Rating: A- (Strong) ✅
This review was conducted by an AI security agent on January 30, 2026, analyzing 15,011 lines of code across 27 security-critical files.
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