==========================================================================
Ubuntu Security Notice USN-1548-2
September 11, 2012

firefox regression
==========================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

USN-1548-1 introduced a regression in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-1548-1 fixed vulnerabilities in Firefox. The new package caused a
regression in Private Browsing which could leak sites visited to the
browser cache. This update fixes the problem.

Original advisory details:

 Gary Kwong, Christian Holler, Jesse Ruderman, Steve Fink, Bob Clary, Andrew
 Sutherland, Jason Smith, John Schoenick, Vladimir Vukicevic and Daniel
 Holbert discovered memory safety issues affecting Firefox. If the user were
 tricked into opening a specially crafted page, an attacker could exploit
 these to cause a denial of service via application crash, or potentially
 execute code with the privileges of the user invoking Firefox.
 (CVE-2012-1970, CVE-2012-1971)
 
 Abhishek Arya discovered multiple use-after-free vulnerabilities. If the
 user were tricked into opening a specially crafted page, an attacker could
 exploit these to cause a denial of service via application crash, or
 potentially execute code with the privileges of the user invoking Firefox.
 (CVE-2012-1972, CVE-2012-1973, CVE-2012-1974, CVE-2012-1975, CVE-2012-1976,
 CVE-2012-3956, CVE-2012-3957, CVE-2012-3958, CVE-2012-3959, CVE-2012-3960,
 CVE-2012-3961, CVE-2012-3962, CVE-2012-3963, CVE-2012-3964)
 
 Mariusz Mlynsk discovered that it is possible to shadow the location object
 using Object.defineProperty. This could potentially result in a cross-site
 scripting (XSS) attack against plugins. With cross-site scripting
 vulnerabilities, if a user were tricked into viewing a specially crafted
 page, a remote attacker could exploit this to modify the contents or steal
 confidential data within the same domain. (CVE-2012-1956)
 
 Mariusz Mlynski discovered an escalation of privilege vulnerability through
 about:newtab. This could possibly lead to potentially code execution with
 the privileges of the user invoking Firefox. (CVE-2012-3965)
 
 Frédéric Hoguin discovered that bitmap format images with a negative height
 could potentially result in memory corruption. If the user were tricked
 into opening a specially crafted image, an attacker could exploit
 this to cause a denial of service via application crash, or potentially
 execute code with the privileges of the user invoking Firefox.
 (CVE-2012-3966)
 
 It was discovered that Firefox's WebGL implementation was vulnerable to
 multiple memory safety issues. If the user were tricked into opening a
 specially crafted page, an attacker could exploit these to cause a denial
 of service via application crash, or potentially execute code with the
 privileges of the user invoking Firefox. (CVE-2012-3967, CVE-2012-3968)
 
 Arthur Gerkis discovered multiple memory safety issues in Firefox's
 Scalable Vector Graphics (SVG) implementation. If the user were tricked
 into opening a specially crafted image, an attacker could exploit these to
 cause a denial of service via application crash, or potentially execute
 code with the privileges of the user invoking Firefox. (CVE-2012-3969,
 CVE-2012-3970)
 
 Christoph Diehl discovered multiple memory safety issues in the bundled
 Graphite 2 library. If the user were tricked into opening a specially
 crafted page, an attacker could exploit these to cause a denial of service
 via application crash, or potentially execute code with the privileges of
 the user invoking Firefox. (CVE-2012-3971)
 
 Nicolas Grégoire discovered an out-of-bounds read in the format-number
 feature of XSLT. This could potentially cause inaccurate formatting of
 numbers and information leakage. (CVE-2012-3972)
 
 Mark Goodwin discovered that under certain circumstances, Firefox's
 developer tools could allow remote debugging even when disabled.
 (CVE-2012-3973)
 
 It was discovered that when the DOMParser is used to parse text/html data
 in a Firefox extension, linked resources within this HTML data will be
 loaded. If the data being parsed in the extension is untrusted, it could
 lead to information leakage and potentially be combined with other attacks
 to become exploitable. (CVE-2012-3975)
 
 Mark Poticha discovered that under certain circumstances incorrect SSL
 certificate information can be displayed on the addressbar, showing the SSL
 data for a previous site while another has been loaded. This could
 potentially be used for phishing attacks. (CVE-2012-3976)
 
 It was discovered that, in some instances, certain security checks in the
 location object could be bypassed. This could allow for the loading of
 restricted content and can potentially be combined with other issues to
 become exploitable. (CVE-2012-3978)
 
 Colby Russell discovered that eval in the web console can execute injected
 code with chrome privileges, leading to the running of malicious code in a
 privileged context. If the user were tricked into opening a specially
 crafted page, an attacker could exploit this to cause a denial of service
 via application crash, or potentially execute code with the privileges of
 the user invoking Firefox. (CVE-2012-3980)

Update instructions:

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

Ubuntu 12.04 LTS:
  firefox                         15.0.1+build1-0ubuntu0.12.04.1

Ubuntu 11.10:
  firefox                         15.0.1+build1-0ubuntu0.11.10.1

Ubuntu 11.04:
  firefox                         15.0.1+build1-0ubuntu0.11.04.1

Ubuntu 10.04 LTS:
  firefox                         15.0.1+build1-0ubuntu0.10.04.1

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

References:
  http://www.ubuntu.com/usn/usn-1548-2
  http://www.ubuntu.com/usn/usn-1548-1
  https://launchpad.net/bugs/1047667

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/15.0.1+build1-0ubuntu0.12.04.1
  https://launchpad.net/ubuntu/+source/firefox/15.0.1+build1-0ubuntu0.11.10.1
  https://launchpad.net/ubuntu/+source/firefox/15.0.1+build1-0ubuntu0.11.04.1
  https://launchpad.net/ubuntu/+source/firefox/15.0.1+build1-0ubuntu0.10.04.1