Ubuntu Update for opal vulnerability USN-562-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-562-1
Solution
Please Install the Updated Packages.
Insight
Jose Miguel Esparza discovered that certain SIP headers were not correctly validated. A remote attacker could send a specially crafted packet to an application linked against opal (e.g. Ekiga) causing it to crash, leading to a denial of service.
Affected
opal vulnerability on Ubuntu 6.06 LTS , Ubuntu 6.10 , Ubuntu 7.04