fix(security): eliminate TOCTOU race conditions in ssl-bump.ts#1159
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fix(security): eliminate TOCTOU race conditions in ssl-bump.ts#1159
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Replace check-then-act patterns (existsSync + writeFileSync/mkdirSync) with atomic operations: - Use mkdirSync with recursive:true (no-op if dir exists) instead of existsSync + mkdirSync - Use writeFileSync with 'wx' flag (O_WRONLY|O_CREAT|O_EXCL) instead of existsSync + writeFileSync, handling EEXIST gracefully This eliminates time-of-check-time-of-use race conditions in both generateSessionCa() and initSslDb(). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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| Metric | Base | PR | Delta |
|---|---|---|---|
| Lines | 82.28% | 82.41% | 📈 +0.13% |
| Statements | 82.25% | 82.30% | 📈 +0.05% |
| Functions | 82.60% | 82.60% | ➡️ +0.00% |
| Branches | 74.43% | 74.21% | 📉 -0.22% |
📁 Per-file Coverage Changes (2 files)
| File | Lines (Before → After) | Statements (Before → After) |
|---|---|---|
src/ssl-bump.ts |
90.6% → 90.5% (-0.09%) | 90.6% → 88.8% (-1.78%) |
src/docker-manager.ts |
83.0% → 83.6% (+0.55%) | 82.4% → 82.9% (+0.53%) |
Coverage comparison generated by scripts/ci/compare-coverage.ts
This was referenced Mar 5, 2026
4 tasks
This was referenced Mar 5, 2026
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Summary
existsSync+writeFileSyncwith atomicwxflag writes (O_WRONLY|O_CREAT|O_EXCL) ininitSslDb()existsSync+mkdirSyncwithmkdirSync({ recursive: true })(no-op if exists) in bothgenerateSessionCa()andinitSslDb()EEXISTerrors gracefully for file creationFixes #838
Test plan
initSslDbtests verify idempotent behavior (existing content preserved)🤖 Generated with Claude Code