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Ubuntu Security Notice USN-2754-1
October 05, 2015

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

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

- 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:

Andrew Osmond, Olli Pettay, Andrew Sutherland, Christian Holler, David
Major, Andrew McCreight, and Cameron McCormack 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-2015-4500)

Khalil Zhani discovered a buffer overflow when parsing VP9 content in some
circumstances. If a user were tricked in to opening a specially crafted
message, 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-2015-4506)

A use-after-free was discovered when manipulating HTML media content 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-2015-4509)

Atte Kettunen discovered a buffer overflow in the nestegg library when
decoding WebM format video in some circumstances. If a user were tricked
in to opening a specially crafted message, 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-2015-4511)

Ronald Crane reported multiple vulnerabilities. If a user were tricked in
to opening a specially crafted website in a browsing context, 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-2015-4517, CVE-2015-4521, CVE-2015-4522,
CVE-2015-7174, CVE-2015-7175, CVE-2015-7176, CVE-2015-7177, CVE-2015-7180)

Mario Gomes discovered that dragging and dropping an image after a
redirect exposes the redirected URL to scripts. An attacker could
potentially exploit this to obtain sensitive information. (CVE-2015-4519)

Ehsan Akhgari discovered 2 issues with CORS preflight requests. An
attacker could potentially exploit these to bypass CORS restrictions.
(CVE-2015-4520)

Update instructions:

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

Ubuntu 15.04:
  thunderbird                     1:38.3.0+build1-0ubuntu0.15.04.1

Ubuntu 14.04 LTS:
  thunderbird                     1:38.3.0+build1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  thunderbird                     1:38.3.0+build1-0ubuntu0.12.04.1

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

References:
  http://www.ubuntu.com/usn/usn-2754-1
  CVE-2015-4500, CVE-2015-4506, CVE-2015-4509, CVE-2015-4511,
  CVE-2015-4517, CVE-2015-4519, CVE-2015-4520, CVE-2015-4521,
  CVE-2015-4522, CVE-2015-7174, CVE-2015-7175, CVE-2015-7176,
  CVE-2015-7177, CVE-2015-7180

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.3.0+build1-0ubuntu0.15.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.3.0+build1-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:38.3.0+build1-0ubuntu0.12.04.1