============================================================================
Ubuntu Security Notice USN-1548-1
August 29, 2012

firefox vulnerabilities
============================================================================

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:

Multiple security issues were fixed in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

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 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-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)

Fr=C3=A9d=C3=A9ric 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 Gr=C3=A9goire 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+build1-0ubuntu0.12.04.1

Ubuntu 11.10:
  firefox                         15.0+build1-0ubuntu0.11.10.1

Ubuntu 11.04:
  firefox                         15.0+build1-0ubuntu0.11.04.2

Ubuntu 10.04 LTS:
  firefox                         15.0+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-1548-1
  CVE-2012-1956, CVE-2012-1970, CVE-2012-1971, 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, CVE-2012-3965, CVE-2012-3966, CVE-2012-3967,
  CVE-2012-3968, CVE-2012-3969, CVE-2012-3970, CVE-2012-3971,
  CVE-2012-3972, CVE-2012-3973, CVE-2012-3975, CVE-2012-3976,
  CVE-2012-3978, CVE-2012-3980, https://launchpad.net/bugs/1041620

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/15.0+build1-0ubuntu0.12.04.1
  https://launchpad.net/ubuntu/+source/firefox/15.0+build1-0ubuntu0.11.10.1
  https://launchpad.net/ubuntu/+source/firefox/15.0+build1-0ubuntu0.11.04.2
  https://launchpad.net/ubuntu/+source/firefox/15.0+build1-0ubuntu0.10.04.1