DollhouseMCP

# Session Notes - September 28, 2025 (Evening) ## SonarCloud DOS Vulnerability Fixes - PR #1187 ### Session Overview Continued work on fixing SonarCloud security hotspots, focusing on DOS (Denial of Service) vulnerabilities identified in Issue #1181. Made significant progress implementing comprehensive DOS protection and addressing reviewer feedback. ### Active Dollhouse Elements **CRITICAL: Load these elements at session start:** - `sonar-guardian` (persona) - SonarCloud compliance expert - `sonarcloud-modernizer` (skill) - Automated code modernization - `sonarcloud-fix-template` (template) - Structured fix documentation - `sonar-sweep-agent` (agent) - Bulk fixing capabilities - `session-2025-09-28-afternoon-sonarcloud-fixes` (memory) - Previous session context ### Completed Work #### 1. Issue #1182 - Authentication Hotspots (✅ COMPLETE) - PR #1186 - Merged successfully - Fixed 48 authentication security hotspots - Replaced Math.random() with crypto.randomInt() - Centralized test credentials #### 2. Issue #1181 - DOS Vulnerabilities (🚧 IN PROGRESS) - PR #1187 - Active development - Fixed 3 critical DOS vulnerabilities: - Template.ts isDangerousRegex() - Fixed recursive vulnerability - fileOperations.ts shouldExclude() - Safe glob matching - FeedbackProcessor.ts calculateRelevance() - Escaped user input #### 3. Comprehensive DOS Protection Module Created `src/security/dosProtection.ts`: - SafeRegex class with timeout protection - DOSProtection utilities for safe operations - Rate limiting and input validation - Based on OWASP guidelines #### 4. Claude Reviewer Recommendations (✅ IMPLEMENTED) - Extracted constants for maintainability - Refactored isDangerous() into modular functions - Added performance tests - Fixed all SonarCloud code quality issues #### 5. Test Infrastructure Fixes - Fixed GitHubRateLimiter infinite loop - Added cleanup() method to prevent timer issues - Added comprehensive DOS protection tests - Added NOSONAR suppressions for intentional test patterns ### Current PR Status - #1187 **Branch:** `feature/sonarcloud-dos-hotspots-1181` **Target:** `develop` **Status:** Ready for review but Quality Gate failing ### Remaining Work for Next Session #### 1. SonarCloud Quality Gate Issues - **C Reliability Rating** - Need to achieve A rating - Check for any remaining code smells - Verify all security hotspots are addressed #### 2. Test Coverage - Current DOS protection tests have some failures (4 of 31) - Need to fix assertion mismatches - Verify performance tests are accurate #### 3. Documentation - Update PR description with final metrics - Document DOS protection API usage - Add examples to dosProtection.ts #### 4. Final Review Items - Ensure all 88 DOS hotspots are addressed (or confirmed as false positives) - Run full test suite - Update security audit report ### Technical Context #### Files Modified in PR #1187 1. `src/security/dosProtection.ts` - New comprehensive protection module 2. `src/elements/templates/Template.ts` - Fixed isDangerousRegex vulnerability 3. `src/utils/fileOperations.ts` - Safe glob pattern matching 4. `src/elements/FeedbackProcessor.ts` - Escaped keyword regex 5. `src/utils/GitHubRateLimiter.ts` - Added cleanup for intervals 6. `test/__tests__/unit/security/dosProtection.test.ts` - New test suite 7. `test/__tests__/unit/utils/GitHubRateLimiter.test.ts` - Fixed timer issues #### Key Security Patterns Implemented - Bounded regex patterns to prevent catastrophic backtracking - Input length validation (MAX_INPUT_LENGTH = 10000) - Timeout protection (REGEX_TIMEOUT_MS = 100ms) - Pattern complexity analysis - Safe escaping for user input ### Important Notes #### SonarCloud False Positives The 88 DOS vulnerabilities reported are mostly false positives: - Many are simple, safe patterns like `/\s+/` - User input is consistently escaped - Existing RegexValidator provides protection - Critical fix was Template.ts vulnerability #### Test Patterns Suppression Added NOSONAR comments for intentional vulnerable patterns in tests: - `/(.+)+$/` - Testing catastrophic backtracking detection - `/^(([a-z])+.)+$/` - Testing timeout detection These are necessary to verify DOS protection works. ### Next Session Checklist 1. [ ] Load all Dollhouse Sonar elements 2. [ ] Review SonarCloud Quality Gate status 3. [ ] Fix remaining test failures 4. [ ] Verify security hotspots are resolved 5. [ ] Consider merging PR #1187 if all checks pass 6. [ ] Move to Issue #1183 (Cryptography) or #1184 (Remaining hotspots) ### Session Metrics - **Issues Closed:** #1182 - **PRs Merged:** #1186 - **PRs Active:** #1187 - **Files Modified:** 7 - **Tests Added:** 31+ performance tests - **Security Fixes:** 3 critical DOS vulnerabilities ### Commands for Quick Setup ```bash # Navigate to project cd /Users/mick/Developer/Organizations/DollhouseMCP/active/mcp-server # Check current branch git branch --show-current # View PR status gh pr view 1187 # Run DOS protection tests npm test -- test/__tests__/unit/security/dosProtection.test.ts # Check SonarCloud status gh pr checks 1187 ``` --- *Session conducted by: Sonar Guardian team* *Date: September 28, 2025* *Focus: DOS vulnerability remediation and test infrastructure*