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πŸ›‘οΈ Sentinel: [CRITICAL] 닀쀑 음수 grep() μ„œλΈŒμ…‹νŒ…μœΌλ‘œ μΈν•œ 벑터 파괴 취약점 ν•΄κ²°#111

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πŸ›‘οΈ Sentinel: [CRITICAL] 닀쀑 음수 grep() μ„œλΈŒμ…‹νŒ…μœΌλ‘œ μΈν•œ 벑터 파괴 취약점 ν•΄κ²°#111
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sentinel-fix-negative-grep-vulnerability-17559475454595105316

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🚨 Severity: CRITICAL

πŸ’‘ Vulnerability:
R/aFIPC.R λ‚΄μ˜ λ³€μˆ˜λͺ… 필터링 κ³Όμ •μ—μ„œ 닀쀑 음수 grep() κ²°κ³Όλ₯Ό κ²°ν•©ν•˜μ—¬(-c(grep(...), grep(...), ...)) 벑터λ₯Ό μ„œλΈŒμ…‹νŒ…(subsetting)ν•˜λŠ” λ‘œμ§μ— 치λͺ…적인 취약점이 μžˆμ—ˆμŠ΅λ‹ˆλ‹€. λͺ¨λ“  νŒ¨ν„΄μ΄ λ²‘ν„°μ˜ μ–΄λ–€ μš”μ†Œμ™€λ„ μΌμΉ˜ν•˜μ§€ μ•Šμ„ 경우 grep()은 integer(0)을 λ°˜ν™˜ν•˜λ©°, μ—¬λŸ¬ 개의 integer(0)을 결합해도 integer(0)이 λ©λ‹ˆλ‹€. 이λ₯Ό μ΄μš©ν•˜μ—¬ vector[-integer(0)]을 μˆ˜ν–‰ν•˜λ©΄, R의 λ‚΄λΆ€ 처리 방식에 μ˜ν•΄ ν•΄λ‹Ή 벑터 전체 λ‚΄μš©μ΄ μ†Œκ±°(wipeout)λ˜μ–΄ 크기가 0인 빈 벑터(character(0))κ°€ λ°˜ν™˜λ©λ‹ˆλ‹€. 이둜 인해 후속 λ³€μˆ˜λͺ… μ°Έμ‘° λ‘œμ§μ— μ‹¬κ°ν•œ 였λ₯˜κ°€ λ°œμƒν•  수 μžˆμŠ΅λ‹ˆλ‹€.

🎯 Impact:
필터링 쑰건에 μΌμΉ˜ν•˜λŠ” λ³€μˆ˜λͺ…이 μ—†λŠ” 경우, IPDParmNames 벑터 λ‚΄μš©μ΄ μ™„μ „νžˆ νŒŒκ΄΄λ˜μ–΄ μ˜ˆμƒμΉ˜ λͺ»ν•œ 후속 둜직 μ—λŸ¬(λŸ°νƒ€μž„ μ—λŸ¬, λ‚΄λΆ€ μƒνƒœ μ˜€μ—Ό λ“±)λ₯Ό μ•ΌκΈ°ν•˜κ³ , μ΅œμ•…μ˜ 경우 λͺ¨λΈ μΆ”μ • 및 데이터 보정에 λŒμ΄ν‚¬ 수 μ—†λŠ” 잘λͺ»λœ κ²°κ³Όλ₯Ό μ΄ˆλž˜ν•  수 μžˆμŠ΅λ‹ˆλ‹€.

πŸ”§ Fix:
μ•ˆμ „ν•˜μ§€ μ•Šμ€ 음수 grep() 필터링 λ‘œμ§μ„ !grepl() 기반의 λ…Όλ¦¬ν˜•(logical) 필터링 λ°©μ‹μœΌλ‘œ μ™„μ „νžˆ κ΅μ²΄ν–ˆμŠ΅λ‹ˆλ‹€. !grepl("^(MEAN|COV|ak|d0$)", IPDParmNames) νŒ¨ν„΄μ„ μ‚¬μš©ν•˜μ—¬ 일치 ν•­λͺ©μ΄ μ—†λŠ” 경우 λͺ¨λ‘ TRUEλ₯Ό λ°˜ν™˜ν•˜λ„λ‘ ν•˜μ—¬, 원본 벑터 μš”μ†Œκ°€ νŒŒκ΄΄λ˜μ§€ μ•Šκ³  μ•ˆμ „ν•˜κ²Œ λ³΄μ‘΄λ˜λ„λ‘ κ°œμ„ ν–ˆμŠ΅λ‹ˆλ‹€.

βœ… Verification:
μˆ˜μ • ν›„ νŒ¨ν‚€μ§€λ₯Ό λ‹€μ‹œ λΉŒλ“œν•˜κ³  ν…ŒμŠ€νŠΈ ν™˜κ²½μ—μ„œ Rscript -e "testthat::test_dir('tests/testthat')"λ₯Ό μˆ˜ν–‰ν•˜μ—¬ κ΄€λ ¨ μ½”λ“œκ°€ λͺ¨λ“  ν™˜κ²½μ—μ„œ μ•ˆμ „ν•˜κ³  μ •μƒμ μœΌλ‘œ μž‘λ™ν•¨μ„ ν™•μΈν–ˆμŠ΅λ‹ˆλ‹€.


PR created automatically by Jules for task 17559475454595105316 started by @seonghobae

…vulnerability caused by multiple empty search results.
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