[ MDVSA-2010:063 ] libpng

[dude67]

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Package : libpng
Date : March 22, 2010
Affected: 2008.0, Corporate 4.0, Multi Network Firewall 2.0
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Problem Description:

Multiple vulnerabilities has been found and corrected in libpng:

libpng before 1.2.37 does not properly parse 1-bit interlaced images
with width values that are not divisible by 8, which causes libpng
to include uninitialized bits in certain rows of a PNG file and
might allow remote attackers to read portions of sensitive memory
via out-of-bounds pixels in the file (CVE-2009-2042).

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 (CVE-2010-0205).

Packages for 2008.0 are provided for Corporate Desktop 2008.0
customers.

The updated packages have been patched to correct these issues.
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References:

http://cve.mitre.org/cgi-bin/cvename.cg ... -2009-2042
http://cve.mitre.org/cgi-bin/cvename.cg ... -2010-0205
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