CVE-2010-0205 libpng stalls and consumes large quantities of memory while processing certain PNG files

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=572308
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0205
https://www.kb.cert.org/vuls/id/576029

libpng stalls on highly compressed ancillary chunks

Libpng stalls and consumes large quantities of memory while processing
certain Portable Network Graphics (PNG) files.

When processing PNG files containing highly compressed ancillary chunks,
the png_decompress_chunk() function in libpng can consume large amounts
of CPU time and memory. This resource consumption may hang applications
that use libpng. More information is available in the PNG Development
Group security advisory and supplementary document, Defending Libpng
Applications Against Decompression Bombs.

This vulnerability could allow an unauthenticated, remote attacker to
cause a denial of service.

http://libpng.sourceforge.net/decompression_bombs.html

Libpng provides functions to limit memory consumption and number of
cached ancillary chunks. Applications that use libpng should use these
functions to set appropriate limits. Please see defense #2 in the
document Defending Libpng Applications Against Decompression Bombs (see
web page above) for more information.

Developers who build versions of libpng can choose to ignore ancillary
chunks by defining specific preprocessor macros. Please see defense #3
in the document Defending Libpng Applications Against Decompression
Bombs (see web page above) for more information.