🛡️ Sentinel: [HIGH] 심볼릭 링크 검증 우회 취약점 패치#90
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- canonicalFile 대신 absoluteFile.normalize를 사용하여 심볼릭 링크 제한(NOFOLLOW_LINKS)을 우회할 수 없도록 수정함.
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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: Security fix correctly addresses symbolic link bypass vulnerability with proper path resolution and containment check. Tests, lint, and security scans passed.
- Head SHA:
74fe99f2542d218499fa53aab58fbc4b1ba36f7e - Workflow run: 28693847707
- 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: HIGH
💡 Vulnerability: 디렉토리 탑 경로를 확인할 때
canonicalFile을 사용함으로 인해 심볼릭 링크가 사전에 해석(resolve)되어NOFOLLOW_LINKS를 이용한 심볼릭 링크 제한이 우회되는 논리적 보안 취약점이 있었습니다.🎯 Impact: 사용자가 악의적으로 심볼릭 링크를 탑 디렉토리로 제공할 경우, 제한을 우회하여 의도치 않은 시스템의 중요한 디렉토리 정보나 파일 목록이 유출될 수 있었습니다.
🔧 Fix:
canonicalFile대신absoluteFile.toPath().normalize().toFile()를 사용함으로써, 파일 시스템 조회를 통한 심볼릭 링크의 선제적 해석을 방지하고 문자열 상의 경로 정규화만 수행하도록 변경하여, 후속NOFOLLOW_LINKS검증 로직이 정상 작동하도록 패치했습니다.✅ Verification:
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 && ./gradlew build jacocoTestReport jacocoTestCoverageVerification명령어를 통해 패치 이후에도 기존의 symlink 테스트(testGoRejectsSymlinkTopDir)를 포함한 모든 기능이 정상적으로 통과되며 코드 커버리지 100%를 충족함을 확인했습니다.PR created automatically by Jules for task 16402415138650020954 started by @seonghobae