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πŸ›‘οΈ Sentinel: [MEDIUM] CSP λ³΄μ•ˆ κ°•ν™” (Nonce λ„μž… 및 인라인 μŠ€νƒ€μΌ 제거)#111

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πŸ›‘οΈ Sentinel: [MEDIUM] CSP λ³΄μ•ˆ κ°•ν™” (Nonce λ„μž… 및 인라인 μŠ€νƒ€μΌ 제거)#111
seonghobae wants to merge 1 commit into
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sentinel/csp-nonce-enhancement-1159183887386254927

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@seonghobae

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🚨 심각도: MEDIUM
πŸ’‘ 취약점: 정적 μƒμ„±λœ HTML λ¬Έμ„œ 내에 λŠμŠ¨ν•œ Content-Security-Policy (CSP) 적용 (style-src 'unsafe-inline'). μ΄λŠ” 좔가적인 λ³΄μ•ˆ 계측을 μ•½ν™”μ‹œν‚΅λ‹ˆλ‹€.
🎯 영ν–₯: κ³΅κ²©μžκ°€ μ–΄λ– ν•œ 방식(예: 취약점을 ν†΅ν•œ 속성 μ£Όμž…)μœΌλ‘œλ“  영ν–₯을 λ―ΈμΉ  수 있게 될 경우, 인라인 μŠ€ν¬λ¦½νŠΈλ‚˜ μŠ€νƒ€μΌμ„ μ‚½μž…ν•˜μ—¬ μ•…μ˜μ μΈ ν–‰μœ„(XSS)둜 μ΄μ–΄μ§ˆ μœ„ν—˜μ΄ μ‘΄μž¬ν•©λ‹ˆλ‹€.
πŸ”§ ν•΄κ²°μ±…: java.security.SecureRandom 및 Base64 인코딩을 μ‚¬μš©ν•˜μ—¬ λ Œλ”λ§ μ‹œλ§ˆλ‹€ 예츑 λΆˆκ°€λŠ₯ν•œ μ•”ν˜Έν•™μ  λ‚œμŠ€(Nonce)λ₯Ό μƒμ„±ν•˜κ³  style-src 정책에 μ μš©ν–ˆμŠ΅λ‹ˆλ‹€. 이λ₯Ό μœ„ν•΄ HTML λ‚΄ <a> νƒœκ·Έμ™€ <div> νƒœκ·Έμ— μ μš©λ˜μ–΄ 있던 인라인 μŠ€νƒ€μΌ 속성을 μ œκ±°ν•˜κ³  λ³„λ„μ˜ CSS 클래슀(.item-link, .empty-msg)둜 μΆ”μƒν™”ν•˜μ˜€μŠ΅λ‹ˆλ‹€.
βœ… 검증 방법: JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64 ./gradlew test jacocoTestReport --continue λͺ…λ Ήμ–΄λ₯Ό μ‚¬μš©ν•˜μ—¬ λͺ¨λ“  ν…ŒμŠ€νŠΈ(특히 CSP 헀더λ₯Ό κ²€μ‚¬ν•˜λŠ” MainTest)κ°€ μ •μƒμ μœΌλ‘œ 톡과됨을 ν™•μΈν–ˆμŠ΅λ‹ˆλ‹€. 100% ν…ŒμŠ€νŠΈ 컀버리지λ₯Ό μœ μ§€ν•©λ‹ˆλ‹€.


PR created automatically by Jules for task 1159183887386254927 started by @seonghobae

- `unsafe-inline`을 μ œκ±°ν•˜κ³  λ¬΄μž‘μœ„ Nonce(λ‚œμŠ€)λ₯Ό μ‚¬μš©ν•œ κ°•λ ₯ν•œ μŠ€νƒ€μΌ CSP 적용
- κΈ°μ‘΄ 인라인 μŠ€νƒ€μΌμ„ CSS 클래슀 `.item-link` 및 `.empty-msg`둜 뢄리
- HTML ν…œν”Œλ¦Ώμ˜ XSS λ°©μ–΄ 계측(Defense in Depth) κ°•ν™”
- κ΄€λ ¨ `MainTest.kt` ν…ŒμŠ€νŠΈ μ½”λ“œ μ—…λ°μ΄νŠΈ μ™„λ£Œ
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