=========================================================== Ubuntu Security Notice USN-765-1 April 28, 2009 firefox-3.0, xulrunner-1.9 vulnerabilities CVE-2009-1313 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: firefox-3.0 3.0.10+nobinonly-0ubuntu0.8.04.1 xulrunner-1.9 1.9.0.10+nobinonly-0ubuntu0.8.04.1 Ubuntu 8.10: abrowser 3.0.10+nobinonly-0ubuntu0.8.10.1 firefox-3.0 3.0.10+nobinonly-0ubuntu0.8.10.1 xulrunner-1.9 1.9.0.10+nobinonly-0ubuntu0.8.10.1 Ubuntu 9.04: abrowser 3.0.10+nobinonly-0ubuntu0.9.04.1 firefox-3.0 3.0.10+nobinonly-0ubuntu0.9.04.1 xulrunner-1.9 1.9.0.10+nobinonly-0ubuntu0.9.04.1 After a standard system upgrade you need to restart Firefox and any applications that use xulrunner, such as Epiphany, to effect the necessary changes. Details follow: It was discovered that the upstream security fixes in USN-764-1 introduced a regression which could cause the browser to crash. If a user were tricked into viewing a malicious website, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program.