🛡️ Sentinel: [CRITICAL] 심볼릭 링크 경로 우회 취약점 수정#86
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- `go` 함수 내에서 `File(topDir).canonicalFile`을 `File(topDir).absoluteFile`로 변경 - 기존 `canonicalFile` 사용 시, 심볼릭 링크 경로가 먼저 해석된 후 `LinkOption.NOFOLLOW_LINKS` 검사가 실행되어 심볼릭 링크 제한 우회 가능성이 존재했음. - 로컬 변수명 규칙 준수를 위해 `top_dir`을 `topDirFile`로 리팩토링. - 보안 일지 (`.jules/sentinel.md`)에 `canonicalFile` 사용 관련 핵심 보안 학습 사항 기록 추가.
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OpenCode Review Overview
Pull request overviewOpenCode reviewed the current-head bounded evidence and found no blocking issues. FindingsNo blocking findings. SummaryApproval sufficiency: bounded evidence supplied affirmative approval evidence for changed files, coverage/docstring posture, risk surfaces, and current-head verification; approval is not based merely on the absence of known blockers.
Changed-File Evidence Mapflowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (2 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (2 files)"]
R1 --> V1["required checks"]
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Pull request overview
OpenCode reviewed the current-head bounded evidence and found no blocking issues.
Findings
No blocking findings.
Summary
Approval sufficiency: bounded evidence supplied affirmative approval evidence for changed files, coverage/docstring posture, risk surfaces, and current-head verification; approval is not based merely on the absence of known blockers.
Verification posture: CodeGraph evidence was initialized and bounded current-head evidence reviewed for changed-file evidence including .jules/sentinel.md, src/main/kotlin/html4tree/main.kt.
Linter/static: workflow/static review evidence is bounded by the current-head GitHub Checks gate and changed-file evidence.
TDD/regression: coverage execution evidence and focused changed hunks were reviewed from bounded-review-evidence.md.
Coverage: coverage execution evidence reports test coverage as not applicable because no supported changed source files or package manifests were found.
Docstring coverage: coverage execution evidence reports docstring coverage as not applicable because no supported changed source files or package manifests were found.
DAG: CodeGraph/source-backed behavior map connects .jules/sentinel.md to the affected review, runtime, or workflow path and required checks.
PoC/execution: coverage-evidence job executed on the current head and reported PASS.
DDD/domain: workflow and repository-governance invariants were reviewed against changed files in bounded evidence.
CDD/context: CodeGraph evidence, changed-file history, and focused hunks were reviewed from bounded-review-evidence.md.
Similar issues: changed-file history evidence was reviewed for comparable local precedents.
Claim/concept check: bounded evidence, repository source, current-head workflow evidence, and, where numeric, scientific, statistical, or literature-backed claims are affected, original-paper/formula evidence and parameter-recovery expectations were used for claims.
Standards search: standards and external-source checks are delegated to configured OpenCode web_search/Context7/DeepWiki sources when applicable; no evidence-backed standards blocker is present in bounded evidence.
Compatibility/convention: changed workflow/script conventions, object naming, and reserved-word safety for schema/API/config/code surfaces were checked in bounded evidence.
Breaking-change/backcompat: deployment evidence and changed-file history were checked for backward-compatibility risk.
Performance: changed surfaces were checked for performance risk in bounded evidence.
Developer experience: changed automation, review, test, setup, and maintenance surfaces were checked for helpful or obstructive DX impact in bounded evidence.
User experience: connected user, operator, API, CLI, documentation, review-comment, status-check, rendering, and workflow-reader behavior was checked for contradictions against code, docs, and tests in bounded evidence.
Visual/DOM: Playwright visual, DOM locator, ARIA snapshot, console, and responsive evidence were checked when a web UI surface was present; for non-web surfaces, API/CLI/log/docs/workflow interaction evidence was reviewed instead.
Accessibility/i18n: accessibility, localization, and human-readable text surfaces were checked where UI, CLI, API message, docs, logs, or review text changed.
Supply-chain/license: dependency, package, model, container, and external-tool changes were checked in bounded evidence.
Packaging: package, build, test, lint, and security contracts were checked in bounded evidence.
Security/privacy: workflow-token, review-gate, and repository-automation security/privacy boundaries were checked in bounded evidence.
- Result: APPROVE
- Reason: Critical security fix correctly replaces canonicalFile with absoluteFile to prevent symlink path traversal at the root. Tests and security scans passed per evidence.
- Head SHA:
201a7bf79842c03b56d9dcd7fe25576f591e6812 - Workflow run: 28683212660
- Workflow attempt: 1
Changed-File Evidence Map
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (2 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (2 files)"]
R1 --> V1["required checks"]
1 participant
🚨 Severity: CRITICAL
💡 Vulnerability: 심볼릭 링크 검사 시
canonicalFile을 미리 사용하여 실제 경로로 치환됨으로써, 루트 디렉토리 설정 시 Path Traversal(경로 우회) 검사(LinkOption.NOFOLLOW_LINKS)를 무력화하는 보안 취약점이 있었습니다.🎯 Impact: 이 취약점을 통해 공격자가 심볼릭 링크를 이용해 인가되지 않은 디렉토리 외부에 접근하여 파일을 인덱싱하고 노출시킬 수 있습니다.
🔧 Fix:
go함수에서 입력받은topDir을 확인 시File.canonicalFile대신File.absoluteFile을 사용하도록 수정하여, 해당 파일 시스템 경로 자체가 검사를 받을 수 있도록 조치했습니다. 또한 코드 컨벤션을 맞추기 위해top_dir변수명을topDirFile로 수정했습니다.✅ Verification:
./gradlew test jacocoTestReport를 통해 실패하던testGoRejectsSymlinkTopDir테스트가 성공적으로 통과하며 100% 명령어 커버리지를 유지하는지 확인했습니다.관련 보안 학습 내역은
.jules/sentinel.md에 문서화했습니다.PR created automatically by Jules for task 5185663412466028231 started by @seonghobae