USN-717-1: Firefox and Xulrunner vulnerabilities

10 February 2009

firefox-3.0, xulrunner-1.9 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • firefox-3.0
  • xulrunner-1.9


Several flaws were discovered in the browser engine. These problems could allow an attacker to crash the browser and possibly execute arbitrary code with user privileges. (CVE-2009-0352, CVE-2009-0353)

A flaw was discovered in the JavaScript engine. An attacker could bypass the same-origin policy in Firefox by utilizing a chrome XBL method and execute arbitrary JavaScript within the context of another website. (CVE-2009-0354)

A flaw was discovered in the browser engine when restoring closed tabs. If a user were tricked into restoring a tab to a malicious website with form input controls, an attacker could steal local files on the user’s system. (CVE-2009-0355)

Wladimir Palant discovered that Firefox did not restrict access to cookies in HTTP response headers. If a user were tricked into opening a malicious web page, a remote attacker could view sensitive information. (CVE-2009-0357)

Paul Nel discovered that Firefox did not honor certain Cache-Control HTTP directives. A local attacker could exploit this to view private data in improperly cached pages of another user. (CVE-2009-0358)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 8.10
abrowser - 3.0.6+nobinonly-0ubuntu0.8.10.1
firefox-3.0 - 3.0.6+nobinonly-0ubuntu0.8.10.1
xulrunner-1.9 -
Ubuntu 8.04 LTS
firefox-3.0 - 3.0.6+nobinonly-0ubuntu0.8.04.1
xulrunner-1.9 -

To update your system, please follow these instructions:

After a standard system upgrade you need to restart Firefox and any applications that use xulrunner, such as Epiphany, to effect the necessary changes.