==========================================================================
Ubuntu Security Notice USN-2859-1
January 13, 2016

thunderbird vulnerabilities
==========================================================================

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

- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Thunderbird.

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

Andrei Vaida, Jesse Ruderman, Bob Clary, and Jesse Ruderman
discovered multiple memory safety issues in Thunderbird. If a user were
tricked in to opening a specially crafted message, 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
Thunderbird. (CVE-2015-7201)

Ronald Crane discovered a buffer overflow through code inspection. If a
user were tricked in to opening a specially crafted website in a browsing
context, 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 Thunderbird. (CVE-2015-7205)

Abhishek Arya discovered an integer overflow when allocating large
textures. If a user were tricked in to opening a specially crafted
website in a browsing context, 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 Thunderbird. (CVE-2015-7212)

Ronald Crane dicovered an integer overflow when processing MP4 format
video in some circumstances. If a user were tricked in to opening a
specially crafted website in a browsing context, 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
Thunderbird. (CVE-2015-7213)

Tsubasa Iinuma discovered a way to bypass same-origin restrictions using
data: and view-source: URLs. If a user were tricked in to opening a
specially crafted website in a browsing context, an attacker could
potentially exploit this to obtain sensitive information and read local
files. (CVE-2015-7214)

Update instructions:

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

Ubuntu 15.10:
  thunderbird                     1:38.5.1+build2-0ubuntu0.15.10.1

Ubuntu 15.04:
  thunderbird                     1:38.5.1+build2-0ubuntu0.15.04.1

Ubuntu 14.04 LTS:
  thunderbird                     1:38.5.1+build2-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  thunderbird                     1:38.5.1+build2-0ubuntu0.12.04.1

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

References:
  http://www.ubuntu.com/usn/usn-2859-1
  CVE-2015-7201, CVE-2015-7205, CVE-2015-7212, CVE-2015-7213,
  CVE-2015-7214

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.5.1+build2-0ubuntu0.15.10.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.5.1+build2-0ubuntu0.15.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.5.1+build2-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.5.1+build2-0ubuntu0.12.04.1