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Ubuntu Security Notice USN-1786-2
April 04, 2013

unity-firefox-extension update
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10

Summary:

This update provides a compatible version of Unity Firefox Extension for
Firefox 20.

Software Description:
- unity-firefox-extension: Unity Integration for Firefox

Details:

USN-1786-1 fixed vulnerabilities in Firefox. This update provides the
corresponding update for Unity Firefox Extension.

Original advisory details:

 Olli Pettay, Jesse Ruderman, Boris Zbarsky, Christian Holler, Milan
 Sreckovic, Joe Drew, Andrew McCreight, Randell Jesup, Gary Kwong and
 Mats Palmgren discovered multiple memory safety issues affecting Firefox.
 If the user were tricked into opening a specially crafted page, an
 attacker could possibly exploit these to cause a denial of service via
 application crash, or potentially execute code with the privileges of the
 user invoking Firefox. (CVE-2013-0788, CVE-2013-0789)
 
 Ambroz Bizjak discovered an out-of-bounds array read in the
 CERT_DecodeCertPackage function of the Network Security Services (NSS)
 libary when decoding certain certificates. An attacker could potentially
 exploit this to cause a denial of service via application crash.
 (CVE-2013-0791)
 
 Tobias Schula discovered an information leak in Firefox when the
 gfx.color_management.enablev4 preference is enabled. If the user were
 tricked into opening a specially crafted image, an attacker could
 potentially exploit this to steal confidential data. By default, the
 gfx.color_management.enablev4 preference is not enabled in Ubuntu.
 (CVE-2013-0792)
 
 Mariusz Mlynski discovered that timed history navigations could be used to
 load arbitrary websites with the wrong URL displayed in the addressbar. An
 attacker could exploit this to conduct cross-site scripting (XSS) or
 phishing attacks. (CVE-2013-0793)
 
 It was discovered that the origin indication on tab-modal dialog boxes
 could be removed, which could allow an attacker's dialog to be displayed
 over another sites content. An attacker could exploit this to conduct
 phishing attacks. (CVE-2013-0794)
 
 Cody Crews discovered that the cloneNode method could be used to
 bypass System Only Wrappers (SOW) to clone a protected node and bypass
 same-origin policy checks. An attacker could potentially exploit this to
 steal confidential data or execute code with the privileges of the user
 invoking Firefox. (CVE-2013-0795)
 
 A crash in WebGL rendering was discovered in Firefox. An attacker could
 potentially exploit this to execute code with the privileges of the user
 invoking Firefox. This issue only affects users with Intel graphics
 drivers. (CVE-2013-0796)
 
 Abhishek Arya discovered an out-of-bounds write in the Cairo graphics
 library. An attacker could potentially exploit this to execute code with
 the privileges of the user invoking Firefox. (CVE-2013-0800)

Update instructions:

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

Ubuntu 12.10:
  xul-ext-unity                   2.4.4-0ubuntu0.2

After a standard system update you need to restart Firefox to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1786-2
  http://www.ubuntu.com/usn/usn-1786-1
  https://launchpad.net/bugs/1161422

Package Information:
  https://launchpad.net/ubuntu/+source/unity-firefox-extension/2.4.4-0ubuntu0.2