[3.11] gh-119342: Fix a potential denial of service in plistlib (GH-119343) #142150
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…pythonGH-119343) Reading a specially prepared small Plist file could cause OOM because file's read(n) preallocates a bytes object for reading the specified amount of data. Now plistlib reads large data by chunks, therefore the upper limit of consumed memory is proportional to the size of the input file. (cherry picked from commit 694922c) Co-authored-by: Serhiy Storchaka <[email protected]>
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python-3.10 Upstream Fix PR: python/cpython#142151 python-3.11 Upstream Fix PR: python/cpython#142150 python-3.12 Upstream Fix PR: python/cpython#142149 Related issues: chainguard-dev/CVE-Dashboard#49073 chainguard-dev/CVE-Dashboard#48783 chainguard-dev/CVE-Dashboard#49656 Signed-off-by: Vivian Rook <[email protected]>
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python-3.10 Upstream Fix PR: python/cpython#142151 python-3.11 Upstream Fix PR: python/cpython#142150 python-3.12 Upstream Fix PR: python/cpython#142149 Related issues: chainguard-dev/CVE-Dashboard#49073 chainguard-dev/CVE-Dashboard#48783 chainguard-dev/CVE-Dashboard#49656 Signed-off-by: Vivian Rook <[email protected]>
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Reading a specially prepared small Plist file could cause OOM because file's read(n) preallocates a bytes object for reading the specified amount of data. Now plistlib reads large data by chunks, therefore the upper limit of consumed memory is proportional to the size of the input file. (cherry picked from commit 694922c)