============================================================================
Ubuntu Security Notice USN-2702-2
August 11, 2015

ubufox update
============================================================================

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

- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

This update provides compatible packages for Firefox 40.

Software Description:
- ubufox: Ubuntu modifications for Firefox

Details:

USN-2702-1 fixed vulnerabilities in Firefox. This update provides the
corresponding updates for Ubufox.

Original advisory details:

 Gary Kwong, Christian Holler, Byron Campen, Tyson Smith, Bobby Holley,
 Chris Coulson, and Eric Rahm 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-2015-4473, CVE-2015-4474)
 
 Aki Helin discovered an out-of-bounds read when playing malformed MP3
 content in some circumstances. If a user were tricked in to opening a
 specially crafted website, an attacker could potentially exploit this to
 obtain sensitive information, cause a denial of service via application
 crash, or execute arbitrary code with the privileges of the user invoking
 Firefox. (CVE-2015-4475)
 
 A use-after-free was discovered during MediaStream playback 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
 priviliges of the user invoking Firefox. (CVE-2015-4477)
 
 Andr=E9 Bargull discovered that non-configurable properties on javascript
 objects could be redefined when parsing JSON. If a user were tricked in to
 opening a specially crafted website, an attacker could potentially exploit
 this to bypass same-origin restrictions. (CVE-2015-4478)
 
 Multiple integer overflows were discovered in libstagefright. 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-2015-4479, CVE-2015-4480, CVE-2015-4493)
 
 Jukka Jyl=E4nki discovered a crash that occurs because javascript does not
 properly gate access to Atomics or SharedArrayBuffers 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. (CVE-2015-4484)
 
 Abhishek Arya discovered 2 buffer overflows in libvpx when decoding
 malformed WebM content in some circumstances. 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-2015-4485, CVE-2015-4486)
 
 Ronald Crane reported 3 security issues. If a user were tricked in to
 opening a specially crafted website, an attacker could potentially
 exploit these, in combination with another security vulnerability, to
 cause a denial of service via application crash, or execute arbitrary
 code with the privileges of the user invoking Firefox. (CVE-2015-4487,
 CVE-2015-4488, CVE-2015-4489)
 
 Christoph Kerschbaumer discovered an issue with Mozilla's implementation
 of Content Security Policy (CSP), which could allow for a more permissive
 usage in some cirucumstances. An attacker could potentially exploit this
 to conduct cross-site scripting (XSS) attacks. (CVE-2015-4490)
 
 Gustavo Grieco discovered a heap overflow in gdk-pixbuf. 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 priviliges of the user invoking
 Firefox. (CVE-2015-4491)
 
 Looben Yang discovered a use-after-free when using XMLHttpRequest with
 shared workers 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 priviliges of the user invoking Firefox. (CVE-2015-4492)

Update instructions:

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

Ubuntu 15.04:
  xul-ext-ubufox                  3.1-0ubuntu0.15.04.1

Ubuntu 14.04 LTS:
  xul-ext-ubufox                  3.1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  xul-ext-ubufox                  3.1-0ubuntu0.12.04.1

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

References:
  https://www.ubuntu.com/usn/usn-2702-2
  https://www.ubuntu.com/usn/usn-2702-1
  https://launchpad.net/bugs/1483858

Package Information:
  https://launchpad.net/ubuntu/+source/ubufox/3.1-0ubuntu0.15.04.1
  https://launchpad.net/ubuntu/+source/ubufox/3.1-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/ubufox/3.1-0ubuntu0.12.04.1