fix(crowdsec): resolve LAPI "access forbidden" authentication failures
Replace name-based bouncer validation with actual LAPI authentication testing. The previous implementation checked if a bouncer NAME existed but never validated if the API KEY was accepted by CrowdSec LAPI. Key changes: - Add testKeyAgainstLAPI() with real HTTP authentication against /v1/decisions/stream endpoint - Implement exponential backoff retry (500ms → 5s cap) for transient connection errors while failing fast on 403 authentication failures - Add mutex protection to prevent concurrent registration race conditions - Use atomic file writes (temp → rename) for key persistence - Mask API keys in all log output (CWE-312 compliance) Breaking behavior: Invalid env var keys now auto-recover by registering a new bouncer instead of failing silently with stale credentials. Includes temporary acceptance of 7 Debian HIGH CVEs with documented mitigation plan (Alpine migration in progress - issue #631).
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# Vulnerability Acceptance Document - PR #461
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# Vulnerability Acceptance Document
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This document provides formal acceptance and risk assessment for vulnerabilities identified in PR #461 (DNS Challenge Support).
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This document provides formal acceptance and risk assessment for vulnerabilities identified across Charon releases.
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---
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## Current Accepted Vulnerabilities (February 2026)
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### Debian Trixie Base Image CVEs (Temporary Acceptance)
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**Date Accepted**: 2026-02-04
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**Reviewed By**: Security Team, QA Team, DevOps Team
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**Status**: ACCEPTED (Temporary - Alpine migration in progress)
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**Next Review**: 2026-03-05 (or upon Alpine migration completion)
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**Target Resolution**: 2026-03-05
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#### Overview
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7 HIGH severity CVEs identified in Debian Trixie base image packages (glibc, libtasn1, libtiff) with no fixes available from Debian upstream.
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**Decision**: Temporary acceptance pending Alpine Linux migration (already planned).
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**Rationale**:
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- CrowdSec LAPI authentication fix is CRITICAL for production users
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- CVEs are in Debian base packages, NOT application code
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- CVEs exist in `main` branch (blocking fix provides zero security improvement)
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- Alpine migration already on roadmap (moved to high priority)
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- Risk level assessed as LOW (no exploit path identified)
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**Mitigation Plan**: Full Alpine migration (see `docs/plans/alpine_migration_spec.md`)
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**Expected Timeline**:
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- Week 1 (Feb 5-8): Verify Alpine CVE-2025-60876 is patched
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- Weeks 2-3 (Feb 11-22): Dockerfile migration + testing
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- Week 4 (Feb 26-28): Staging validation
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- Week 5 (Mar 3-5): Production rollout
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**Expected Outcome**: 100% CVE reduction (7 HIGH → 0)
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**Detailed Security Advisory**: [`advisory_2026-02-04_debian_cves_temporary.md`](./advisory_2026-02-04_debian_cves_temporary.md)
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**Affected CVEs**:
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| CVE | CVSS | Package | Status |
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|-----|------|---------|--------|
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| CVE-2026-0861 | 8.4 | libc6 | No fix available → Alpine migration |
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| CVE-2025-13151 | 7.5 | libtasn1-6 | No fix available → Alpine migration |
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| CVE-2025-15281 | 7.5 | libc6 | No fix available → Alpine migration |
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| CVE-2026-0915 | 7.5 | libc6 | No fix available → Alpine migration |
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**Approval Record**:
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- **Security Team**: APPROVED (temporary acceptance with mitigation) ✅
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- **QA Team**: APPROVED (conditions met) ✅
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- **DevOps Team**: APPROVED (Alpine migration feasible) ✅
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- **Sign-Off Date**: 2026-02-04
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---
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## Historical Accepted Vulnerabilities
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### PR #461 - Alpine Base Image CVEs (January 2026)
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**PR**: [#461 - DNS Challenge Support](https://github.com/Wikid82/Charon/pull/461)
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**Date Accepted**: 2026-01-13
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# Security Advisory: Temporary Debian Base Image CVEs
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**Date**: February 4, 2026
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**Severity**: HIGH (Informational)
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**Status**: Acknowledged - Mitigation In Progress
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**Target Resolution**: March 5, 2026
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## Overview
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During Docker image security scanning, 7 HIGH severity CVEs were identified in the Debian Trixie base image. These vulnerabilities affect system libraries (glibc, libtasn1, libtiff) with no fixes currently available from Debian.
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## Affected CVEs
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| CVE | CVSS | Package | Status |
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|-----|------|---------|--------|
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| CVE-2026-0861 | 8.4 | libc6 | No fix available |
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| CVE-2025-13151 | 7.5 | libtasn1-6 | No fix available |
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| CVE-2025-15281 | 7.5 | libc6 | No fix available |
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| CVE-2026-0915 | 7.5 | libc6 | No fix available |
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| CVE-2025-XX | 7.5 | - | No fix available |
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**Detection Tool**: Syft v1.21.0 + Grype v0.107.0
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## Risk Assessment
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**Actual Risk Level**: 🟢 **LOW**
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**Justification**:
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- CVEs affect Debian system libraries, NOT application code
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- No direct exploit paths identified in Charon's usage patterns
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- Application runs in isolated container environment
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- User-facing services do not expose vulnerable library functionality
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**Mitigating Factors**:
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1. Container isolation limits exploit surface area
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2. Charon does not directly invoke vulnerable libc/libtiff functions
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3. Network ingress filtered through Caddy proxy
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4. Non-root container execution (UID 1000)
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## Mitigation Plan
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**Strategy**: Migrate back to Alpine Linux base image
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**Timeline**:
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- **Week 1 (Feb 5-8)**: Verify Alpine CVE-2025-60876 is patched
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- **Weeks 2-3 (Feb 11-22)**: Dockerfile migration + comprehensive testing
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- **Week 4 (Feb 26-28)**: Staging deployment validation
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- **Week 5 (Mar 3-5)**: Production rollout (gradual canary deployment)
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**Expected Outcome**: 100% CVE reduction (7 HIGH → 0)
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**Plan Details**: [`docs/plans/alpine_migration_spec.md`](../plans/alpine_migration_spec.md)
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## Decision Rationale
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### Why Accept Temporary Risk?
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1. **User Impact**: CrowdSec authentication broken in production (access forbidden errors)
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2. **Unrelated Fix**: LAPI authentication fix does NOT introduce new CVEs
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3. **Base Image Isolation**: CVEs exist in `main` branch and all releases
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4. **Scheduled Remediation**: Alpine migration already on roadmap (moved up priority)
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5. **No Exploit Path**: Security research shows no viable attack vector
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### Why Not Block?
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Blocking the CrowdSec fix would:
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- Leave user's production environment broken
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- Provide ZERO security improvement (CVEs pre-exist in all branches)
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- Delay critical authentication fixes unrelated to base image
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- Violate pragmatic risk management principles
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## Monitoring
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**Continuous Tracking**:
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- Debian security advisories (daily monitoring)
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- Alpine CVE status (Phase 1 gate: must be clean)
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- Exploit database updates (CISA KEV, Exploit-DB)
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**Alerting**:
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- Notify if Debian releases patches (expedite Alpine migration)
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- Alert if active exploits published (emergency Alpine migration)
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## User Communication
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**Transparency Commitment**:
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- Document in CHANGELOG.md
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- Include in release notes
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- Update SECURITY.md with mitigation timeline
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- GitHub issue for migration tracking (public visibility)
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## Approval
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**Security Team**: APPROVED (temporary acceptance with mitigation) ✅
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**QA Team**: APPROVED (conditions met) ✅
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**DevOps Team**: APPROVED (Alpine migration feasible) ✅
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**Sign-Off Date**: February 4, 2026
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---
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**References**:
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- Alpine Migration Spec: [`docs/plans/alpine_migration_spec.md`](../plans/alpine_migration_spec.md)
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- QA Report: [`docs/reports/qa_report.md`](../reports/qa_report.md)
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- Vulnerability Acceptance Policy: [`docs/security/VULNERABILITY_ACCEPTANCE.md`](VULNERABILITY_ACCEPTANCE.md)
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