The remote host is missing an update to xulrunner-1.9 announced via advisory USN-798-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: firefox-3.0 3.0.12+build1+nobinonly-0ubuntu0.8.04.1 xulrunner-1.9 1.9.0.12+build1+nobinonly-0ubuntu0.8.04.1 Ubuntu 8.10: abrowser 3.0.12+build1+nobinonly-0ubuntu0.8.10.1 firefox-3.0 3.0.12+build1+nobinonly-0ubuntu0.8.10.1 xulrunner-1.9 1.9.0.12+build1+nobinonly-0ubuntu0.8.10.2 Ubuntu 9.04: abrowser 3.0.12+build1+nobinonly-0ubuntu0.9.04.1 firefox-3.0 3.0.12+build1+nobinonly-0ubuntu0.9.04.1 xulrunner-1.9 1.9.0.12+build1+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. https://secure1.securityspace.com/smysecure/catid.html?in=USN-798-1

Several flaws were discovered in the Firefox browser and JavaScript engines. 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. (CVE-2009-2462, CVE-2009-2463, CVE-2009-2464, CVE-2009-2465, CVE-2009-2466, CVE-2009-2469) Attila Suszter discovered a flaw in the way Firefox processed Flash content. If a user were tricked into viewing and navigating within a specially crafted Flash object, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2009-2467) It was discovered that Firefox did not properly handle some SVG content. An attacker could exploit this to cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2009-2469) A flaw was discovered in the JavaScript engine. If a user were tricked into viewing a malicious website, an attacker could exploit this perform cross-site scripting attacks. (CVE-2009-2472)