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πŸ›‘οΈ Sentinel: [HIGH] HTML λ Œλ”λ§ μ‹œ XSS(크둜슀 μ‚¬μ΄νŠΈ μŠ€ν¬λ¦½νŒ…) 취약점 λ°©μ§€ - #50

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πŸ›‘οΈ Sentinel: [HIGH] HTML λ Œλ”λ§ μ‹œ XSS(크둜슀 μ‚¬μ΄νŠΈ μŠ€ν¬λ¦½νŒ…) 취약점 λ°©μ§€#50
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🚨 Severity: HIGH
πŸ’‘ Vulnerability: μ• ν”Œλ¦¬μΌ€μ΄μ…˜μ—μ„œ 디렉토리 및 파일 이름을 읽어 index.html νŒŒμΌμ„ 생성할 λ•Œ, 이름에 μ•…μ˜μ μΈ HTML 및 슀크립트 μ½”λ“œ(예: <script>alert(1)</script>)κ°€ ν¬ν•¨λ˜μ–΄ 있으면 κ·ΈλŒ€λ‘œ λ Œλ”λ§λ˜μ–΄ XSS 곡격에 λ…ΈμΆœλ  수 μžˆμ—ˆμŠ΅λ‹ˆλ‹€.
🎯 Impact: μƒμ„±λœ index.html을 μ—΄λžŒν•˜λŠ” μ‚¬μš©μžμ˜ λΈŒλΌμš°μ €μ—μ„œ μž„μ˜μ˜ μ•…μ„± μŠ€ν¬λ¦½νŠΈκ°€ 싀행될 수 μžˆμŠ΅λ‹ˆλ‹€.
πŸ”§ Fix: String.escapeHtml() ν™•μž₯ ν•¨μˆ˜λ₯Ό λ„μž…ν•˜μ—¬ 파일 및 디렉토리 μ΄λ¦„μ˜ <, >, &, ", ' λ¬Έμžλ“€μ„ μ•ˆμ „ν•œ HTML μ—”ν‹°ν‹°λ‘œ λ³€ν™˜ν•˜μ˜€μŠ΅λ‹ˆλ‹€. μΆ”κ°€λ‘œ href 속성값을 λͺ…μ‹œμ μœΌλ‘œ λ”°μ˜΄ν‘œλ‘œ κ°μ‹Έμ„œ 속성 νƒˆμΆœ 곡격도 λ°©μ–΄ν–ˆμŠ΅λ‹ˆλ‹€. build.gradle에 JaCoCo ν”ŒλŸ¬κ·ΈμΈμ„ μ„€μ •ν•˜μ—¬ 100% λ‹¨μœ„ ν…ŒμŠ€νŠΈ 컀버리지λ₯Ό κ΅¬ν˜„ν–ˆμŠ΅λ‹ˆλ‹€.
βœ… Verification: ./gradlew test jacocoTestReport μ‹€ν–‰ ν›„ build/reports/jacoco/test/html/index.html νŒŒμΌμ„ 톡해 ν…ŒμŠ€νŠΈκ°€ ν†΅κ³Όν•˜κ³  100% 컀버리지λ₯Ό λ‹¬μ„±ν–ˆμŒμ„ ν™•μΈν–ˆμŠ΅λ‹ˆλ‹€.


PR created automatically by Jules for task 5890943741233817557 started by @seonghobae

- `html4tree/main.kt`μ—μ„œ 디렉토리 및 파일 이름 좜λ ₯ μ‹œ λ°œμƒν•  수 μžˆλŠ” XSS(크둜슀 μ‚¬μ΄νŠΈ μŠ€ν¬λ¦½νŒ…) 취약점을 λ°©μ§€ν•˜κΈ° μœ„ν•΄ `String.escapeHtml()` ν™•μž₯ ν•¨μˆ˜λ₯Ό μΆ”κ°€ν•˜κ³  μ μš©ν–ˆμŠ΅λ‹ˆλ‹€.
- 속성 νƒˆμΆœ(Attribute Breakout)을 λ°©μ§€ν•˜κΈ° μœ„ν•΄ `<a>` νƒœκ·Έμ˜ `href` 속성을 ν°λ”°μ˜΄ν‘œ(`"`)둜 κ°μŒŒμŠ΅λ‹ˆλ‹€.
- μ½”λ“œ λ³€κ²½ 사항을 μ™„λ²½ν•˜κ²Œ κ²€μ¦ν•˜κΈ° μœ„ν•΄ JaCoCo ν…ŒμŠ€νŠΈ 컀버리지 λ¦¬ν¬νŒ… κΈ°λŠ₯을 μΆ”κ°€ν•˜κ³ , 100% 컀버리지λ₯Ό λ‹¬μ„±ν•˜λŠ” λ‹¨μœ„ ν…ŒμŠ€νŠΈ 슈트λ₯Ό μž‘μ„±ν–ˆμŠ΅λ‹ˆλ‹€.
- `.jules/sentinel.md` 에 λ³΄μ•ˆ μΈμ‚¬μ΄νŠΈ 기둝을 μΆ”κ°€ν–ˆμŠ΅λ‹ˆλ‹€.
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@seonghobae

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Closing as superseded by already-merged XSS hardening (#21 and #45). Current master escapes HTML including backticks, quotes attributes, percent-encodes href path segments, and adds CSP defense-in-depth; this stale branch uses a narrower escaping approach and would drop newer security/accessibility/performance behavior.

@seonghobae seonghobae closed this Jun 30, 2026
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Closing as superseded by already-merged XSS hardening (#21 and #45). Current master escapes HTML including backticks, quotes attributes, percent-encodes href path segments, and adds CSP defense-in-depth; this stale branch uses a narrower escaping approach and would drop newer security/accessibility/performance behavior.

μ•Œκ² μŠ΅λ‹ˆλ‹€. 이 μž‘μ—…μ΄ 이미 λ³‘ν•©λœ λ³€κ²½ 사항에 μ˜ν•΄ λŒ€μ²΄λ˜μ—ˆμœΌλ©° 더 이상 μœ νš¨ν•˜μ§€ μ•ŠμŒμ„ ν™•μΈν–ˆμŠ΅λ‹ˆλ‹€. 이 μž‘μ—…μ— λŒ€ν•œ μΆ”κ°€ μˆ˜μ •μ„ μ€‘λ‹¨ν•˜κ² μŠ΅λ‹ˆλ‹€.

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