=========================================================================Ubuntu Security Notice USN-1367-1
February 16, 2012
libpng vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
libpng could be made to crash or run programs as your login if it opened a
specially crafted file.
Software Description:
- libpng: PNG (Portable Network Graphics) file library
Details:
It was discovered that libpng did not properly verify the embedded profile
length of iCCP chunks. An attacker could exploit this to cause a denial of
service via application crash. This issue only affected Ubuntu 8.04 LTS.
(CVE-2009-5063)
Jueri Aedla discovered that libpng did not properly verify the size used
when allocating memory during chunk decompression. If a user or automated
system using libpng were tricked into opening a specially crafted image,
an attacker could exploit this to cause a denial of service or execute
code with the privileges of the user invoking the program. (CVE-2011-3026)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
libpng12-0 1.2.46-3ubuntu1.1
Ubuntu 11.04:
libpng12-0 1.2.44-1ubuntu3.2
Ubuntu 10.10:
libpng12-0 1.2.44-1ubuntu0.2
Ubuntu 10.04 LTS:
libpng12-0 1.2.42-1ubuntu2.3
Ubuntu 8.04 LTS:
libpng12-0 1.2.15~beta5-3ubuntu0.5
After a standard system update you need to restart your session to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-1367-1
CVE-2009-5063, CVE-2011-3026
Package Information:
https://launchpad.net/ubuntu/+source/libpng/1.2.46-3ubuntu1.1
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu3.2
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu0.2
https://launchpad.net/ubuntu/+source/libpng/1.2.42-1ubuntu2.3
https://launchpad.net/ubuntu/+source/libpng/1.2.15~beta5-3ubuntu0.5
