[USN-896-1] Firefox 3.5 and Xulrunner 1.9.1 vulnerabilities

By | 2010/02/17

The following security announcement applies to firefox and xulrunner. If you have firefox and xulrunner installed, please see below for details on the vulnerability and instructions on patching your system:

Several flaws were discovered in the browser engine of Firefox. 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-2010-0159)

Orlando Barrera II discovered a flaw in the Web Workers implementation of
Firefox. If a user were tricked into posting to a malicious website, an
attacker could cause a denial of service or possibly execute arbitrary code
with the privileges of the user invoking the program. (CVE-2010-0160)

Alin Rad Pop discovered that Firefox’s HTML parser would incorrectly free
memory under certain circumstances. If the browser could be made to access
these freed memory objects, an attacker could exploit this to execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2009-1571)

Hidetake Jo discovered that the showModalDialog in Firefox did not always
honor the same-origin policy. An attacker could exploit this to run
untrusted JavaScript from other domains. (CVE-2009-3988)

Georgi Guninski discovered that the same-origin check in Firefox could be
bypassed by utilizing a crafted SVG image. If a user were tricked into
viewing a malicious website, an attacker could exploit this to read data
from other domains. (CVE-2010-0162)

The above security vulnerabilities apply to the following Ubuntu releases:

  • Ubuntu 9.10

If you have this utility installed on your Ubuntu system you’ll need to apply the security update to be protected. Please follow the steps below to ensure your system is properly patched:

Apply Updates

To apply the updates run the following command(s) within your Terminal:

sudo aptitude update
sudo aptitude safe-upgrade

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

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