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Pardus: 2010-41: Libpng: Denial of Service Print E-mail
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Posted by Benjamin D. Thomas   
A vulnerability has been reported in libpng, which can be exploited by malicious people to cause a DoS (Denial of Service).
Pardus Linux Security Advisory 2010-41  
      Date: 2010-03-29
  Severity: 3
      Type: Local

A vulnerability has been reported in libpng, which can be exploited  by
malicious people to cause a DoS (Denial of Service).

The png_decompress_chunk function in  pngrutil.c  in  libpng  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.

Affected packages:

    libpng-1.2.43-21-6, all before 2009

    libpng-1.2.43-20-10, all before 2008

There are update(s) for libpng-1.2.43-21-6, libpng-1.2.43-20-10. You can
update them via Package Manager or with a single command from console:

    pisi up libpng-1.2.43-21-6 libpng-1.2.43-20-10


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