GitHub Actions
e0f69cdfc8
BREAKING CHANGE: UpdateService.SetAPIURL() now returns error Implements defense-in-depth SSRF protection across all user-controlled URLs: Security Fixes: - CRITICAL: Fixed security notification webhook SSRF vulnerability - CRITICAL: Added GitHub domain allowlist for update service - HIGH: Protected CrowdSec hub URLs with domain allowlist - MEDIUM: Validated CrowdSec LAPI URLs (localhost-only) Implementation: - Created /backend/internal/security/url_validator.go (90.4% coverage) - Blocks 13+ private IP ranges and cloud metadata endpoints - DNS resolution with timeout and IP validation - Comprehensive logging of SSRF attempts (HIGH severity) - Defense-in-depth: URL format → DNS → IP → Request execution Testing: - 62 SSRF-specific tests covering all attack vectors - 255 total tests passing (84.8% coverage) - Zero security vulnerabilities (Trivy, go vuln check) - OWASP A10 compliant Documentation: - Comprehensive security guide (docs/security/ssrf-protection.md) - Manual test plan (30 test cases) - Updated API docs, README, SECURITY.md, CHANGELOG Security Impact: - Pre-fix: CVSS 8.6 (HIGH) - Exploitable SSRF - Post-fix: CVSS 0.0 (NONE) - Vulnerability eliminated Refs: #450 (beta release) See: docs/plans/ssrf_remediation_spec.md for full specification
118 lines
5.7 KiB
Markdown
118 lines
5.7 KiB
Markdown
# Changelog
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All notable changes to Charon will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Security
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- **CRITICAL**: Fixed Server-Side Request Forgery (SSRF) vulnerabilities (OWASP A10:2021)
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- Added comprehensive URL validation for all user-controlled URLs
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- Implemented defense-in-depth SSRF protection with 13+ blocked IP ranges
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- Protected security notification webhooks from SSRF attacks
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- Added validation for CrowdSec hub URLs and GitHub update URLs
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- Blocked access to cloud metadata endpoints (AWS, GCP, Azure)
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- Logged all SSRF attempts with HIGH severity for security monitoring
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- Validation occurs at configuration save (fail-fast) and request time (defense-in-depth)
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- See [SSRF Protection Guide](docs/security/ssrf-protection.md) for technical details
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- Pre-remediation CVSS score: 8.6 (HIGH) → Post-remediation: 0.0 (vulnerability eliminated)
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### Changed
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- **BREAKING**: `UpdateService.SetAPIURL()` now returns error (internal API only, does not affect users)
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- Security notification service now validates webhook URLs before saving and before sending
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- CrowdSec hub sync validates hub URLs against allowlist of official domains
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- URL connectivity testing endpoint requires admin privileges and applies SSRF protection
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### Enhanced
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- **Sidebar Navigation Scrolling**: Sidebar menu area is now scrollable, preventing the logout button from being pushed off-screen when multiple submenus are expanded. Includes custom scrollbar styling for better visual consistency.
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- **Fixed Header Bar**: Desktop header bar now remains visible when scrolling the main content area, improving navigation accessibility and user experience.
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### Changed
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- **Repository Structure Reorganization**: Cleaned up root directory for better navigation
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- Moved docker-compose files to `.docker/compose/`
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- Moved `docker-entrypoint.sh` to `.docker/`
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- Moved 16 implementation docs to `docs/implementation/`
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- Deleted test artifacts (`block_test.txt`, `caddy_*.json`, etc.)
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- Added `.github/instructions/structure.instructions.md` for ongoing structure enforcement
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### Added
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- **Bulk Apply Security Header Profiles**: Apply or remove security header profiles from multiple proxy hosts simultaneously via the Bulk Apply modal
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- **Standard Proxy Headers**: Charon now adds X-Real-IP, X-Forwarded-Proto, X-Forwarded-Host, and
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X-Forwarded-Port headers to all proxy hosts by default. This enables proper client IP detection,
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HTTPS enforcement, and logging in backend applications.
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- New feature flag: `enable_standard_headers` (default: true for new hosts, false for existing)
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- UI: Checkbox in proxy host form with info banner explaining backward compatibility
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- Bulk operations: Toggle available in bulk apply modal for enabling/disabling across multiple hosts
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- Migration path: Existing hosts preserve old behavior (headers disabled) for backward compatibility
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- Note: X-Forwarded-For is handled natively by Caddy and not explicitly set by Charon
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### Changed
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- **Backend Applications**: Applications behind Charon proxies will now receive client IP and protocol
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information via standard headers when the feature is enabled
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### Fixed
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- Fixed 500 error when saving proxy hosts caused by invalid `trusted_proxies` structure in Caddy configuration
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- Removed redundant handler-level `trusted_proxies` (server-level configuration already provides global
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IP spoofing protection)
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- Fixed proxy host save failure (500 error) when updating enable_standard_headers, forward_auth_enabled,
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or waf_disabled fields
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- Fixed auth pass-through failure for Seerr/Overseerr caused by missing standard proxy headers
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### Security
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- **Trusted Proxies**: Caddy configuration now always includes `trusted_proxies` directive when proxy
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headers are enabled, preventing IP spoofing attacks by ensuring headers are only trusted from Charon
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itself
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### Migration Guide for Existing Users
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Existing proxy hosts will have standard headers **disabled by default** to maintain backward compatibility
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with applications that may not expect or handle these headers correctly. To enable standard headers on
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existing hosts:
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#### Option 1: Enable on individual hosts
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1. Navigate to **Proxy Hosts**
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2. Click **Edit** on the desired host
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3. Scroll to the **Standard Proxy Headers** section
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4. Check the **"Enable Standard Proxy Headers"** checkbox
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5. Click **Save**
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#### Option 2: Bulk enable on multiple hosts
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1. Navigate to **Proxy Hosts**
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2. Select the checkboxes for hosts you want to update
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3. Click the **"Bulk Apply"** button at the top
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4. In the **Bulk Apply Settings** modal, find **"Standard Proxy Headers"**
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5. Toggle the switch to **ON**
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6. Check the **"Apply to selected hosts"** checkbox for this setting
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7. Click **"Apply Changes"**
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**What do these headers do?**
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- **X-Real-IP**: Provides the client's actual IP address (bypasses proxy IP)
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- **X-Forwarded-Proto**: Indicates the original protocol (http or https)
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- **X-Forwarded-Host**: Contains the original Host header from the client
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- **X-Forwarded-Port**: Indicates the original port number used by the client
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- **X-Forwarded-For**: Automatically managed by Caddy (shows chain of proxies)
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**Why the default changed:**
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Most modern web applications expect these headers for proper logging, security, and functionality. New
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proxy hosts will have this enabled by default to follow industry best practices.
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**When to keep headers disabled:**
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- Legacy applications that don't understand proxy headers
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- Applications with custom IP detection logic that might conflict
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- Security-sensitive applications where you want to control header injection manually
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