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Ubuntu Security Notice USN-1369-1
February 17, 2012

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

- Ubuntu 11.10

Summary:

Several security issues were fixed in Thunderbird.

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

Details:

Nicolas Gregoire and Aki Helin discovered that when processing a malformed
embedded XSLT stylesheet, Thunderbird can crash due to memory corruption.
If the user were tricked into opening a specially crafted page, an attacker
could exploit this to cause a denial of service via application crash, or
potentially execute code with the privileges of the user invoking
Thunderbird. (CVE-2012-0449)

It was discovered that memory corruption could occur during the decoding of
Ogg Vorbis files. If the user were tricked into opening a specially crafted
file, an attacker could exploit this to cause a denial of service via
application crash, or potentially execute code with the privileges of the
user invoking Thunderbird. (CVE-2012-0444)

Tim Abraldes discovered that when encoding certain image types the
resulting data was always a fixed size. There is the possibility of
sensitive data from uninitialized memory being appended to these images.
(CVE-2012-0447)

It was discovered that Thunderbird did not properly perform XPConnect
security checks. An attacker could exploit this to conduct cross-site
scripting (XSS) attacks through web pages and Thunderbird extensions. With
cross-site scripting vulnerabilities, if a user were tricked into viewing a
specially crafted page, a remote attacker could exploit this to modify the
contents, or steal confidential data, within the same domain.
(CVE-2012-0446)

It was discovered that Thunderbird did not properly handle node removal in
the DOM. If the user were tricked into opening a specially crafted page, an
attacker could exploit this to cause a denial of service via application
crash, or potentially execute code with the privileges of the user invoking
Thunderbird. (CVE-2011-3659)

Alex Dvorov discovered that Thunderbird did not properly handle sub-frames
in form submissions. An attacker could exploit this to conduct phishing
attacks using HTML5 frames. (CVE-2012-0445)

Ben Hawkes, Christian Holler, Honza Bombas, Jason Orendorff, Jesse
Ruderman, Jan Odvarko, Peter Van Der Beken, Bob Clary, and Bill McCloskey
discovered memory safety issues affecting Thunderbird. If the user were
tricked into opening a specially crafted page, an attacker could exploit
these to cause a denial of service via application crash, or potentially
execute code with the privileges of the user invoking Thunderbird.
(CVE-2012-0442, CVE-2012-0443)

Andrew McCreight and Olli Pettay discovered a use-after-free vulnerability
in the XBL bindings. An attacker could exploit this to cause a denial of
service via application crash, or potentially execute code with the
privileges of the user invoking Thunderbird. (CVE-2012-0452)

Jueri Aedla discovered that libpng, which is in Thunderbird, did not
properly verify the size used when allocating memory during chunk
decompression. If a user or automated system using libpng were tricked into
opening a specially crafted image, an attacker could exploit this to cause
a denial of service or execute code with the privileges of the user
invoking the program. (CVE-2011-3026)

Update instructions:

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

Ubuntu 11.10:
  thunderbird                     10.0.2+build1-0ubuntu0.11.10.1

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

References:
  http://www.ubuntu.com/usn/usn-1369-1
  CVE-2011-3659, CVE-2012-0442, CVE-2012-0443, CVE-2012-0444,
  CVE-2012-0445, CVE-2012-0446, CVE-2012-0447, CVE-2012-0449,
  CVE-2012-0452, https://launchpad.net/bugs/923372, https://launchpad.net/bugs/929964, https://launchpad.net/bugs/933382

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/10.0.2+build1-0ubuntu0.11.10.1