ITSS-Advisory : Medium : Mozilla : Firefox

THREAT LEVEL
============
Medium

INFORMATION
===========
Product: Firefox
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2009-3069 CVE-2009-3070 CVE-2009-3071
CVE-2009-3072 CVE-2009-3073 CVE-2009-3074
CVE-2009-3075 CVE-2009-3076 CVE-2009-3077
CVE-2009-3078 CVE-2009-3079 Member content until: Saturday, October 10 2009

AFFECTED PLATFORMS
==================
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows

ACTION
======
OVERVIEW

Mozilla has released 5 advisories relating to Firefox describing a
total of 11 vulnerabilities. Mozilla has rated 3 of these
advisories as "Critical", 1 as "Moderate" and 1 as "Low" impact.

IMPACT

According to Mozilla, the vulnerabilties corrected in this
update are:

o MFSA 2009-47 (CVE-2009-3069,CVE-2009-3070,CVE-2009-3071,
CVE-2009-3072,CVE-2009-3073,CVE-2009-3074,CVE-2009-3075): "Mozilla
developers and community members identified and fixed several
stability bugs in the browser engine used in Firefox and other
Mozilla-based products. Some of these crashes showed evidence of
memory corruption under certain circumstances and we presume that with
enough effort at least some of these could be exploited to run
arbitrary code." [1]

o MSFA 2009-48 (CVE-2009-3076): "...when security modules were added or
removed via pkcs11.addmodule or pkcs11.deletemodule, the resulting
dialog was not sufficiently informative. Without sufficient warning,
an attacker could entice a victim to install a malicious PKCS11
module and affect the cryptographic integrity of the victim's
browser." [2]

o MSFA 2009-49 (CVE-2009-3077): "...the columns of a XUL tree element
could be manipulated in a particular way which would leave a pointer
owned by the column pointing to freed memory. An attacker could
potentially use this vulnerability to crash a victim's browser and
run arbitrary code on the victim's computer." [3]

o MSFA 2009-50 (CVE-2009-3078): "...the default Windows font used to
render the locationbar and other text fields was improperly
displaying certain Unicode characters with tall line-height. In such
cases the tall line-height would cause the rest of the text in the
input field to be scrolled vertically out of view. An attacker could
use this vulnerability to prevent a user from seeing the URL of a
malicious site." [4]

o MSFA 2009-51 (CVE-2009-3079): "...the BrowserFeedWriter could be
leveraged to run JavaScript code from web content with elevated
privileges. Using this vulnerability, an attacker could construct
an object containing malicious JavaScript and cause the FeedWriter
to process the object, running the malicious code with chrome
privileges." [5]

MITIGATION
==========
These vulnerabilities have been fixed in Firefox 3.5.3 and
Firefox 3.0.14. Updated versions of these programs are available from
the Mozilla web site. [6]

REFERENCES

[1] Mozilla Foundation Security Advisory 2009-47
http://www.mozilla.org/security/announce/2009/mfsa2009-47.html

[2] Mozilla Foundation Security Advisory 2009-48
http://www.mozilla.org/security/announce/2009/mfsa2009-48.html

[3] Mozilla Foundation Security Advisory 2009-49
http://www.mozilla.org/security/announce/2009/mfsa2009-49.html

[4] Mozilla Foundation Security Advisory 2009-50
http://www.mozilla.org/security/announce/2009/mfsa2009-50.html

[5] Mozilla Foundation Security Advisory 2009-51
http://www.mozilla.org/security/announce/2009/mfsa2009-51.html

[6] Mozilla Firefox web browser
http://www.mozilla.org/firefox