=========================================================================Ubuntu Security Notice USN-2934-1
April 27, 2016

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

- Ubuntu 16.04 LTS
- Ubuntu 15.10
- 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:

Bob Clary, Christoph Diehl, Christian Holler, Andrew McCreight, Daniel
Holbert, Jesse Ruderman, and Randell Jesup 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-2016-1952)

Nicolas Golubovic discovered that CSP violation reports can be used to
overwrite local files. If a user were tricked in to opening a specially
crafted website in a browsing context with addon signing disabled and
unpacked addons installed, an attacker could potentially exploit this to
gain additional privileges. (CVE-2016-1954)

Jose Martinez and Romina Santillan discovered a memory leak in
libstagefright during MPEG4 video file processing 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 memory exhaustion. (CVE-2016-1957)

A use-after-free was discovered in the HTML5 string parser. 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-2016-1960)

A use-after-free was discovered in the SetBody function of HTMLDocument.
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-2016-1961)

Nicolas Grégoire discovered a use-after-free during XML transformations.
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-2016-1964)

A memory corruption issues was discovered in the NPAPI subsystem. If
a user were tricked in to opening a specially crafted website in a
browsing context with a malicious plugin installed, 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-2016-1966)

Ronald Crane discovered an out-of-bounds read following a failed
allocation in the HTML parser 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-2016-1974)

Francis Gabriel discovered a buffer overflow during ASN.1 decoding in NSS.
A remote 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-2016-1950)

Holger Fuhrmannek, Tyson Smith and Holger Fuhrmannek reported multiple
memory safety issues in the Graphite 2 library. 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-2016-1977, CVE-2016-2790, CVE-2016-2791, CVE-2016-2792,
CVE-2016-2793, CVE-2016-2794, CVE-2016-2795, CVE-2016-2796, CVE-2016-2797,
CVE-2016-2798, CVE-2016-2799, CVE-2016-2800, CVE-2016-2801, CVE-2016-2802)

Update instructions:

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

Ubuntu 16.04 LTS:
  thunderbird                     1:38.7.2+build1-0ubuntu0.16.04.1

Ubuntu 15.10:
  thunderbird                     1:38.7.2+build1-0ubuntu0.15.10.1

Ubuntu 14.04 LTS:
  thunderbird                     1:38.7.2+build1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  thunderbird                     1:38.7.2+build1-0ubuntu0.12.04.1

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

References:
  https://ubuntu.com/security/notices/USN-2934-1
  CVE-2016-1950, CVE-2016-1952, CVE-2016-1954, CVE-2016-1957,
  CVE-2016-1960, CVE-2016-1961, CVE-2016-1964, CVE-2016-1966,
  CVE-2016-1974, CVE-2016-1977, CVE-2016-2790, CVE-2016-2791,
  CVE-2016-2792, CVE-2016-2793, CVE-2016-2794, CVE-2016-2795,
  CVE-2016-2796, CVE-2016-2797, CVE-2016-2798, CVE-2016-2799,
  CVE-2016-2800, CVE-2016-2801, CVE-2016-2802

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.7.2+build1-0ubuntu0.16.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.7.2+build1-0ubuntu0.15.10.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.7.2+build1-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.7.2+build1-0ubuntu0.12.04.1