USN-1367-1: libpng vulnerabilities

Releases

• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• 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 8.04

• libpng12-0 - 1.2.15~beta5-3ubuntu0.5

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

• libpng12-0 - 1.2.42-1ubuntu2.3

After a standard system update you need to restart your session to make
all the necessary changes.

References

• CVE-2009-5063
• CVE-2011-3026

Related notices

• USN-1367-3
• USN-1367-4
• USN-1367-2