Ubuntu Update for libproxy USN-1629-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-1629-1
Solution
Please Install the Updated Packages.
Insight
Tomas Mraz discovered that libproxy incorrectly handled certain PAC files. A remote attacker could use this issue to cause libproxy to crash, or to possibly execute arbitrary code. (CVE-2012-4504, CVE-2012-4505)
Affected
libproxy on Ubuntu 12.04 LTS , Ubuntu 11.10 , Ubuntu 10.04 LTS