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Ubuntu Security Notice USN-2390-1
October 28, 2014

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Pidgin.

Software Description:
- pidgin: graphical multi-protocol instant messaging client for X

Details:

Jacob Appelbaum and an anonymous person discovered that Pidgin incorrectly
handled certificate validation. A remote attacker could exploit this to
perform a man in the middle attack to view sensitive information or alter
encrypted communications. (CVE-2014-3694)

Yves Younan and Richard Johnson discovered that Pidgin incorrectly handled
certain malformed MXit emoticons. A malicious remote server or a man in the
middle could use this issue to cause Pidgin to crash, resulting in a denial
of service. (CVE-2014-3695)

Yves Younan and Richard Johnson discovered that Pidgin incorrectly handled
certain malformed Groupwise messages. A malicious remote server or a man in
the middle could use this issue to cause Pidgin to crash, resulting in a
denial of service. (CVE-2014-3696)

Thijs Alkemade and Paul Aurich discovered that Pidgin incorrectly handled
memory when processing XMPP messages. A malicious remote server or user
could use this issue to cause Pidgin to disclosure arbitrary memory,
resulting in an information leak. (CVE-2014-3698)

Update instructions:

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

Ubuntu 14.10:
  libpurple0                      1:2.10.9-0ubuntu7.1
  pidgin                          1:2.10.9-0ubuntu7.1

Ubuntu 14.04 LTS:
  libpurple0                      1:2.10.9-0ubuntu3.2
  pidgin                          1:2.10.9-0ubuntu3.2

Ubuntu 12.04 LTS:
  libpurple0                      1:2.10.3-0ubuntu1.6
  pidgin                          1:2.10.3-0ubuntu1.6

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

References:
  http://www.ubuntu.com/usn/usn-2390-1
  CVE-2014-3694, CVE-2014-3695, CVE-2014-3696, CVE-2014-3698

Package Information:
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.9-0ubuntu7.1
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.9-0ubuntu3.2
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.3-0ubuntu1.6