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==========================================================================
Ubuntu Security Notice USN-1149-1
June 22, 2011

firefox, xulrunner-1.9.2 vulnerabilities
==========================================================================

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

- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

Multiple Vulnerabilities were fixed in Firefox and Xulrunner

Software Description:
- firefox: safe and easy web browser from Mozilla
- xulrunner-1.9.2: XUL + XPCOM application runner

Details:

Multiple memory vulnerabilities were discovered in the browser rendering
engine. An attacker could use these to possibly execute arbitrary code with
the privileges of the user invoking Firefox. (CVE-2011-2364, CVE-2011-2365,
CVE-2011-2374, CVE-2011-2376)

Martin Barbella discovered that under certain conditions, viewing a XUL
document while JavaScript was disabled caused deleted memory to be
accessed. An attacker could potentially use this to crash Firefox or
execute arbitrary code with the privileges of the user invoking Firefox.
(CVE-2011-2373)
 
Jordi Chancel discovered a vulnerability on multipart/x-mixed-replace
images due to memory corruption. An attacker could potentially use this to
crash Firefox or execute arbitrary code with the privileges of the user
invoking Firefox. (CVE-2011-2377)
 
Chris Rohlf and Yan Ivnitskiy discovered an integer overflow vulnerability
in JavaScript Arrays. An attacker could potentially use this to execute
arbitrary code with the privileges of the user invoking Firefox.
(CVE-2011-2371)

Multiple use-after-free vulnerabilities were discovered. An attacker could
potentially use these to execute arbitrary code with the privileges of the
user invoking Firefox. (CVE-2011-0083, CVE-2011-0085, CVE-2011-2363)

David Chan discovered that cookies did not honor same-origin conventions.
This could potentially lead to cookie data being leaked to a third party.
(CVE-2011-2362)

Update instructions:

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

Ubuntu 10.10:
  firefox                         3.6.18+build2+nobinonly-0ubuntu0.10.10.1
  xulrunner-1.9.2                 1.9.2.18+build2+nobinonly-0ubuntu0.10.10.1

Ubuntu 10.04 LTS:
  firefox                         3.6.18+build2+nobinonly-0ubuntu0.10.04.1
  xulrunner-1.9.2                 1.9.2.18+build2+nobinonly-0ubuntu0.10.04.1

After a standard system update you need to restart Firefox and any
applications which use Xulrunner to make all the necessary changes.

References:
  CVE-2011-0083, CVE-2011-0085, CVE-2011-2362, CVE-2011-2363,
  CVE-2011-2364, CVE-2011-2365, CVE-2011-2371, CVE-2011-2373,
  CVE-2011-2374, CVE-2011-2376, CVE-2011-2377

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/3.6.18+build2+nobinonly-0ubuntu0.10.10.1
  https://launchpad.net/ubuntu/+source/xulrunner-1.9.2/1.9.2.18+build2+nobinonly-0ubuntu0.10.10.1
  https://launchpad.net/ubuntu/+source/firefox/3.6.18+build2+nobinonly-0ubuntu0.10.04.1
  https://launchpad.net/ubuntu/+source/xulrunner-1.9.2/1.9.2.18+build2+nobinonly-0ubuntu0.10.04.1



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