Ubuntu Security Notice USN-690-3

17th December, 2008

firefox vulnerabilities

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

• Ubuntu 6.06 LTS

Software description

• firefox

Details

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-2008-5500)

Boris Zbarsky discovered that the same-origin check in Firefox could be
bypassed by utilizing XBL-bindings. An attacker could exploit this to read data
from other domains. (CVE-2008-5503)

Marius Schilder discovered that Firefox did not properly handle redirects to
an outside domain when an XMLHttpRequest was made to a same-origin resource.
It's possible that sensitive information could be revealed in the
XMLHttpRequest response. (CVE-2008-5506)

Chris Evans discovered that Firefox did not properly protect a user's data when
accessing a same-domain Javascript URL that is redirected to an unparsable
Javascript off-site resource. If a user were tricked into opening a malicious
website, an attacker may be able to steal a limited amount of private data.
(CVE-2008-5507)

Several flaws were discovered in the Javascript engine. If a user were tricked
into opening a malicious website, an attacker could exploit this to execute
arbitrary Javascript code within the context of another website or with chrome
privileges. (CVE-2008-5511, CVE-2008-5512)

Update instructions

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

Ubuntu 6.06 LTS:

firefox 1.5.dfsg+1.5.0.15~prepatch080614i-0ubuntu1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to restart Firefox to effect the
necessary changes.

References

CVE-2008-5500, CVE-2008-5503, CVE-2008-5506, CVE-2008-5507, CVE-2008-5511, CVE-2008-5512