USN-546-1 fixed vulnerabilities in Firefox. The upstream update included a faulty patch which caused the drawImage method of the canvas element to fail. This update fixes the problem.
We apologize for the inconvenience.
4 December 2007
A security issue affects these releases of Ubuntu and its derivatives:
USN-546-1 fixed vulnerabilities in Firefox. The upstream update included a faulty patch which caused the drawImage method of the canvas element to fail. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that Firefox incorrectly associated redirected sites as the origin of “jar:” contents. A malicious web site could exploit this to modify or steal confidential data (such as passwords) from other web sites. (CVE-2007-5947)
Various flaws were discovered in the layout and JavaScript engines. By tricking a user into opening a malicious web page, an attacker could execute arbitrary code with the user’s privileges. (CVE-2007-5959)
Gregory Fleischer discovered that it was possible to use JavaScript to manipulate Firefox’s Referer header. A malicious web site could exploit this to conduct cross-site request forgeries against sites that relied only on Referer headers for protection from such attacks. (CVE-2007-5960)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart Firefox to effect the necessary changes.
Vulmon