🛡️ Sentinel: [보안 개선] DOM 조작 시 안전한 실패 처리 추가

[seonghobae]

🚨 Severity: MEDIUM
💡 Vulnerability: DOM 조작 시 대상 요소가 없을 경우 스크립트 실행이 중단(Crash)되는 문제 발견.
🎯 Impact: 악의적 사용자가 DOM 요소를 임의로 수정할 수 있는 경우 에러를 유발하여 애플리케이션의 정상적인 작동을 마비(DoS)시킬 수 있음.
🔧 Fix: .getElementById 및 .closest 호출 뒤 대상 요소의 존재 여부를 미리 검사하여, 실패 시 console.warn을 출력하고 안전하게 실행되도록 수정.
✅ Verification: components/index.html에서 브라우저 테스트 및 pytest tests/ 정상 통과 확인.

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PR created automatically by Jules for task 16100444017654781404 started by @seonghobae

Summary by CodeRabbit

• 버그 수정

  • 갤러리에서 탭 패널이나 태그를 찾지 못해도 오류로 중단되지 않도록 안정성을 개선했습니다.
  • 존재하지 않는 화면 요소를 처리할 때 경고를 기록하고 안전하게 동작합니다.

• 테스트

  • 갤러리의 누락된 요소 처리와 오류 방지를 검증하는 보안 회귀 테스트를 추가했습니다.

[google-labs-jules]

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 31c60511-7f25-4268-9024-0724724a54fa

📥 Commits

Reviewing files that changed from the base of the PR and between 3075e79 and 1a84dfe.

📒 Files selected for processing (1)

• tests/test_component_gallery_security.py

📝 Walkthrough

Walkthrough

갤러리 스크립트가 탭 패널과 태그 요소의 부재를 안전하게 처리합니다. 요소가 없으면 DOM 작업을 중단하고 경고를 기록합니다. 보안 회귀 테스트가 이 동작을 검증합니다.

Changes

갤러리 DOM 안전 처리

Layer / File(s)	Summary
DOM 요소 null 검사 구현 components/krds-gallery.js, .jules/sentinel.md	탭 패널과 태그 제거 대상이 존재할 때만 DOM 작업을 수행합니다. 대상이 없으면 console.warn을 호출합니다. 관련 안전 처리 지침을 문서에 추가했습니다.
DOM 안전 처리 회귀 검증 tests/test_component_gallery_security.py	갤러리 스크립트의 null 검사와 console.warn 호출을 검증하는 테스트를 추가했습니다.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	제목은 DOM 조작의 안전한 실패 처리를 명확히 설명하며 PR의 주요 변경 사항과 일치합니다.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sentinel-dom-null-check-16100444017654781404

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[coderabbitai]

🧹 Nitpick comments (1)

tests/test_component_gallery_security.py (1)

78-86: 🎯 Functional Correctness | 🔵 Trivial | ⚡ Quick win

실행 기반 DOM 회귀 테스트로 보강하세요.

현재 테스트는 JavaScript 소스에 특정 문자열이 있는지만 확인합니다. 따라서 가드가 잘못된 위치에 있거나 클릭 시 예외가 발생해도 테스트가 통과할 수 있습니다. 기존 브라우저 테스트 환경에서 패널이 없는 탭과 .closest(".krds-tag")가 null인 제거 버튼을 각각 실행하세요. 두 경우 모두 예외가 발생하지 않고 console.warn이 호출되는지 검증하세요.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@tests/test_component_gallery_security.py` around lines 78 - 86, Replace the
source-string assertions in test_component_gallery_script_fails_securely with
browser-executed DOM regression cases: run a tab interaction without its panel
and a remove-button interaction where closest(".krds-tag") returns null,
asserting each completes without throwing and calls console.warn. Reuse the
existing browser test setup and keep the scenarios focused on the two defensive
guards.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Nitpick comments:
In `@tests/test_component_gallery_security.py`:
- Around line 78-86: Replace the source-string assertions in
test_component_gallery_script_fails_securely with browser-executed DOM
regression cases: run a tab interaction without its panel and a remove-button
interaction where closest(".krds-tag") returns null, asserting each completes
without throwing and calls console.warn. Reuse the existing browser test setup
and keep the scenarios focused on the two defensive guards.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 4c6d4e0b-e2ba-467d-a137-bc07acb0b486

📥 Commits

Reviewing files that changed from the base of the PR and between 7723bf2 and 3075e79.

📒 Files selected for processing (3)

• .jules/sentinel.md
• components/krds-gallery.js
• tests/test_component_gallery_security.py

[seonghobae]

PR #144 is now the canonical current-main owner for this same component-gallery DOM surface. It preserves the missing-panel and missing-tag fail-safe intent while fixing two defects in this branch: a requested missing panel is rejected before any partial aria-selected/tabindex/visibility mutation, and the attacker-controlled aria-controls value is never interpolated into console output. #144 also retains valid tag removal, proves the behavior by executing the real gallery script, integrates the WAI-ARIA roving-tab keyboard contract, and records the claim/rollback/standards boundary in doctoring. This branch adds only weaker parallel code and bot-journal churn. #144 must be refreshed after the durable CI dependency and establish its own exact-head evidence; nothing transfers. Closing as superseded.

[google-labs-jules]

PR #144 is now the canonical current-main owner for this same component-gallery DOM surface. It preserves the missing-panel and missing-tag fail-safe intent while fixing two defects in this branch: a requested missing panel is rejected before any partial aria-selected/tabindex/visibility mutation, and the attacker-controlled aria-controls value is never interpolated into console output. #144 also retains valid tag removal, proves the behavior by executing the real gallery script, integrates the WAI-ARIA roving-tab keyboard contract, and records the claim/rollback/standards boundary in doctoring. This branch adds only weaker parallel code and bot-journal churn. #144 must be refreshed after the durable CI dependency and establish its own exact-head evidence; nothing transfers. Closing as superseded.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.