Ubuntu Security Notice USN-745-1 – It was discovered that Firefox did not properly perform XUL garbage collection. If a user were tricked into viewing a malicious website, a remote attacker could cause a denial of service or execute arbitrary code with the privileges of the user invoking the program. This issue only affected Ubuntu 8.04 LTS and 8.10. A flaw was discovered in the way Firefox performed XSLT transformations. If a user were tricked into opening a crafted XSL stylesheet, an attacker could cause a denial of service or execute arbitrary code with the privileges of the user invoking the program.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76159/USN-745-1.txt
Source: https://packetstormsecurity.com/files/76159/Ubuntu-Security-Notice-745-1.html