--- title: 'USN-562-1: opal vulnerability | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-562-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-562-1 --- # USN-562-1: opal vulnerability Publication date 8 January 2008 Overview opal vulnerability Releases [7.04](https://ubuntu.com/security/notices?release=feisty) [6.10](https://ubuntu.com/security/notices?release=edgy) [6.06](https://ubuntu.com/security/notices?release=dapper) --- Open side navigation ## Packages * [opal](https://ubuntu.com/security/cves?package=opal) - ## Details 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. ## Update instructions After a standard system upgrade you need to restart your session to effect the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 7.04 feisty | [libopal-2.2.0](https://launchpad.net/ubuntu/+source/opal) –  [2.2.3.dfsg-2ubuntu2.1](https://launchpad.net/ubuntu/+source/opal/2.2.3.dfsg-2ubuntu2.1) | | | | 6.10 edgy | [libopal-2.2.0](https://launchpad.net/ubuntu/+source/opal) –  [2.2.3.dfsg-0ubuntu2.1](https://launchpad.net/ubuntu/+source/opal/2.2.3.dfsg-0ubuntu2.1) | | | | 6.06 dapper | [libopal-2.2.0](https://launchpad.net/ubuntu/+source/opal) –  [2.2.1-1ubuntu1.1](https://launchpad.net/ubuntu/+source/opal/2.2.1-1ubuntu1.1) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2007-4924](https://ubuntu.com/security/CVE-2007-4924)