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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
The png_decompress_chunk function in pngrutil.c in libpng 1.0.x before 1.0.53, 1.2.x before 1.2.43, and 1.4.x before 1.4.1 does not properly handle compressed ancillary-chunk data that has a disproportionately large uncompressed representation, which allows remote attackers to cause a denial of service (memory and CPU consumption, and application hang) via a crafted PNG file, as demonstrated by use of the deflate compression method on data composed of many occurrences of the same character, related to a "decompression bomb" attack.
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Access Vector (AV):
Access Complexity (AC):
Allows disruption of service
This issue has been addressed in Red Hat Enterprise Linux 3, 4, and 5 via https://rhn.redhat.com/errata/RHSA-2010-0534.html.
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https://exchange.xforce.ibmcloud.com/vulnerabilities/56661 [No Types Assigned]
http://xforce.iss.net/xforce/xfdb/56661 [No Types Assigned]