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Ubuntu Security Notice USN-2372-1
October 14, 2014

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

- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Firefox could be made to crash or run programs as your login if it
opened a malicious website.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

Bobby Holley, Christian Holler, David Bolter, Byron Campen, Jon Coppeard,
Carsten Book, Martijn Wargers, Shih-Chiang Chien, Terrence Cole and
Jeff Walden discovered multiple memory safety issues in Firefox. If a user
were tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service via application
crash, or execute arbitrary code with the privileges of the user invoking
Firefox. (CVE-2014-1574, CVE-2014-1575)

Atte Kettunen discovered a buffer overflow during CSS manipulation. If a
user were tricked in to opening a specially crafted website, an attacker
could potentially exploit this to cause a denial of service via
application crash or execute arbitrary code with the privileges of the
user invoking Firefox. (CVE-2014-1576)

Holger Fuhrmannek discovered an out-of-bounds read with Web Audio. If a
user were tricked in to opening a specially crafted website, an attacker
could potentially exploit this to steal sensitive information.
(CVE-2014-1577)

Abhishek Arya discovered an out-of-bounds write when buffering WebM video
in some circumstances. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to cause a
denial of service via application crash or execute arbitrary code with
the privileges of the user invoking Firefox. (CVE-2014-1578)

Michal Zalewski discovered that memory may not be correctly initialized
when rendering a malformed GIF in to a canvas in some circumstances. If
a user were tricked in to opening a specially crafted website, an attacker
could potentially exploit this to steal sensitive information.
(CVE-2014-1580)

A use-after-free was discovered during text layout in some circumstances.
If a user were tricked in to opening a specially crafted website, an
attacker could potentially exploit this to cause a denial of service via
application crash or execute arbitrary code with the privileges of the
user invoking Firefox. (CVE-2014-1581)

Patrick McManus and David Keeler discovered 2 issues that could result
in certificate pinning being bypassed in some circumstances. An attacker
with a fraudulent certificate could potentially exploit this conduct a
man in the middle attack. (CVE-2014-1582, CVE-2014-1584)

Eric Shepherd and Jan-Ivar Bruaroey discovered issues with video sharing
via WebRTC in iframes, where video continues to be shared after being
stopped and navigating to a new site doesn't turn off the camera. An
attacker could potentially exploit this to access the camera without the
user being aware. (CVE-2014-1585, CVE-2014-1586)

Boris Zbarsky discovered that webapps could use the Alarm API to read the
values of cross-origin references. If a user were tricked in to installing
a specially crafter webapp, an attacker could potentially exploit this to
bypass same-origin restrictions. (CVE-2014-1583)

Update instructions:

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

Ubuntu 14.04 LTS:
  firefox                         33.0+build2-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  firefox                         33.0+build2-0ubuntu0.12.04.1

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

References:
  https://www.ubuntu.com/usn/usn-2372-1
  CVE-2014-1574, CVE-2014-1575, CVE-2014-1576, CVE-2014-1577,
  CVE-2014-1578, CVE-2014-1580, CVE-2014-1581, CVE-2014-1582,
  CVE-2014-1583, CVE-2014-1584, CVE-2014-1585, CVE-2014-1586

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/33.0+build2-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/firefox/33.0+build2-0ubuntu0.12.04.1