USN-913-1: libpng vulnerabilities

Publication date

16 March 2010

Overview

libpng vulnerabilities


Packages

Details

It was discovered that libpng did not properly initialize memory when
decoding certain 1-bit interlaced images. If a user or automated system
were tricked into processing crafted PNG images, an attacker could possibly
use this flaw to read sensitive information stored in memory. This issue
only affected Ubuntu 6.06 LTS, 8.04 LTS, 8.10 and 9.04. (CVE-2009-2042)

It was discovered that libpng did not properly handle certain excessively
compressed PNG images. If a user or automated system were tricked into
processing a crafted PNG image, an attacker could possibly use this flaw to
consume all available resources, resulting in a denial of service.
(CVE-2010-0205)

It was discovered that libpng did not properly initialize memory when
decoding certain 1-bit interlaced images. If a user or automated system
were tricked into processing crafted PNG images, an attacker could possibly
use this flaw to read sensitive information stored in memory. This issue
only affected Ubuntu 6.06 LTS, 8.04 LTS, 8.10 and 9.04. (CVE-2009-2042)

It was discovered that libpng did not properly handle certain excessively
compressed PNG images. If a user or automated system were tricked into
processing a crafted PNG image, an attacker could possibly use this flaw to
consume all available resources, resulting in a denial of service.
(CVE-2010-0205)

Update instructions

After a standard system upgrade you need to reboot your computer to effect the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
9.10 karmic libpng12-0 –  1.2.37-1ubuntu0.1
9.04 jaunty libpng12-0 –  1.2.27-2ubuntu2.1
8.10 intrepid libpng12-0 –  1.2.27-1ubuntu0.2
8.04 hardy libpng12-0 –  1.2.15~beta5-3ubuntu0.2
6.06 dapper libpng12-0 –  1.2.8rel-5ubuntu0.5

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