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Ubuntu Security Notice USN-1746-1
February 25, 2013

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Pidgin.

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

Details:

Chris Wysopal discovered that Pidgin incorrectly handled file transfers in
the MXit protocol handler. A remote attacker could use this issue to create
or overwrite arbitrary files. This issue only affected Ubuntu 11.10,
Ubuntu 12.04 LTS and Ubuntu 12.10. (CVE-2013-0271)

It was discovered that Pidgin incorrectly handled long HTTP headers in the
MXit protocol handler. A malicious remote server could use this issue to
execute arbitrary code. (CVE-2013-0272)

It was discovered that Pidgin incorrectly handled long user IDs in the
Sametime protocol handler. A malicious remote server could use this issue
to cause Pidgin to crash, resulting in a denial of service. (CVE-2013-0273)

It was discovered that Pidgin incorrectly handled long strings when
processing UPnP responses. A remote attacker could use this issue to cause
Pidgin to crash, resulting in a denial of service. (CVE-2013-0274)

Update instructions:

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

Ubuntu 12.10:
  libpurple0                      1:2.10.6-0ubuntu2.2
  pidgin                          1:2.10.6-0ubuntu2.2

Ubuntu 12.04 LTS:
  libpurple0                      1:2.10.3-0ubuntu1.3
  pidgin                          1:2.10.3-0ubuntu1.3

Ubuntu 11.10:
  libpurple0                      1:2.10.0-0ubuntu2.2
  pidgin                          1:2.10.0-0ubuntu2.2

Ubuntu 10.04 LTS:
  libpurple0                      1:2.6.6-1ubuntu4.6
  pidgin                          1:2.6.6-1ubuntu4.6

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

References:
  http://www.ubuntu.com/usn/usn-1746-1
  CVE-2013-0271, CVE-2013-0272, CVE-2013-0273, CVE-2013-0274

Package Information:
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.6-0ubuntu2.2
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.3-0ubuntu1.3
  https://launchpad.net/ubuntu/+source/pidgin/1:2.10.0-0ubuntu2.2
  https://launchpad.net/ubuntu/+source/pidgin/1:2.6.6-1ubuntu4.6