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Ubuntu Security Notice USN-1222-2
October 04, 2011

mozvoikko, ubufox, webfav update
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04

Summary:

This update provides packages compatible with Firefox 7.

Software Description:
- mozvoikko: Finnish spell-checker extension for Firefox
- ubufox: Ubuntu Firefox specific configuration defaults and apt support
- webfav: Firefox extension for saving web favorites (bookmarks)

Details:

USN-1222-1 fixed vulnerabilities in Firefox. This update provides updated
packages for use with Firefox 7.

Original advisory details:

 Benjamin Smedberg, Bob Clary, Jesse Ruderman, Bob Clary, Andrew McCreight,
 Andreas Gal, Gary Kwong, Igor Bukanov, Jason Orendorff, Jesse Ruderman, and
 Marcia Knous discovered multiple memory vulnerabilities in the browser
 rendering engine. An attacker could use these to possibly execute arbitrary
 code with the privileges of the user invoking Firefox. (CVE-2011-2995,
 CVE-2011-2997)
 
 Boris Zbarsky discovered that a frame named "location" could shadow the
 window.location object unless a script in a page grabbed a reference to the
 true object before the frame was created. This is in violation of the Same
 Origin Policy. A malicious website could possibly use this to access
 another website or the local file system. (CVE-2011-2999)
 
 Ian Graham discovered that when multiple Location headers were present,
 Firefox would use the second one resulting in a possible CRLF injection
 attack. CRLF injection issues can result in a wide variety of attacks, such
 as XSS (Cross-Site Scripting) vulnerabilities, browser cache poisoning, and
 cookie theft. (CVE-2011-3000)
 
 Mariusz Mlynski discovered that if the user could be convinced to hold down
 the enter key, a malicious website could potential pop up a download dialog
 and the default open action would be selected or lead to the installation
 of an arbitrary add-on. This would result in potentially malicious content
 being run with privileges of the user invoking Firefox. (CVE-2011-2372,
 CVE-2011-3001)
 
 Michael Jordon and Ben Hawkes discovered flaws in WebGL. If a user were
 tricked into opening a malicious page, an attacker could cause the browser
 to crash. (CVE-2011-3002, CVE-2011-3003)
 
 It was discovered that Firefox did not properly free memory when processing
 ogg files. If a user were tricked into opening a malicious page, an
 attacker could cause the browser to crash. (CVE-2011-3005)
 
 David Rees and Aki Helin discovered a problems in the JavaScript engine. An
 attacker could exploit this to crash the browser or potentially escalate
 privileges within the browser. (CVE-2011-3232)

Update instructions:

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

Ubuntu 11.04:
  xul-ext-mozvoikko               1.10.0-0ubuntu0.11.04.1
  xul-ext-ubufox                  0.9.2-0ubuntu0.11.04.1
  xul-ext-webfav                  1.17-0ubuntu5.2

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

References:
  http://www.ubuntu.com/usn/usn-1222-2
  http://www.ubuntu.com/usn/usn-1222-1
  https://launchpad.net/bugs/857098

Package Information:
  https://launchpad.net/ubuntu/+source/mozvoikko/1.10.0-0ubuntu0.11.04.1
  https://launchpad.net/ubuntu/+source/ubufox/0.9.2-0ubuntu0.11.04.1
  https://launchpad.net/ubuntu/+source/webfav/1.17-0ubuntu5.2