Applications using Off-the-Record messaging plugins could be madeto crash or run programs if it received specially crafted networkmessages.

=========================================================================Ubuntu Security Notice USN-1541-1
August 16, 2012

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

Applications using Off-the-Record messaging plugins could be made
to crash or run programs if it received specially crafted network
messages.

Software Description:
- libotr: Off-the-Record Messaging library

Details:

Justin Ferguson discovered multiple heap overflows in libotr. A remote
attacker could use this to craft a malformed OTR message that could
cause a denial of service via application crash or possibly execute
arbitrary code.

Update instructions:

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

Ubuntu 12.04 LTS:
  libotr2                         3.2.0-4ubuntu0.1

Ubuntu 11.10:
  libotr2                         3.2.0-2.1ubuntu0.1

Ubuntu 11.04:
  libotr2                         3.2.0-2ubuntu1.1

Ubuntu 10.04 LTS:
  libotr2                         3.2.0-2ubuntu0.1

After a standard system update you need to restart any instant
messaging applications using an Off-the-Record messaging plugin to
make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-1541-1
  CVE-2012-3461

Package Information:
  https://launchpad.net/ubuntu/+source/libotr/3.2.0-4ubuntu0.1
  https://launchpad.net/ubuntu/+source/libotr/3.2.0-2.1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libotr/3.2.0-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/libotr/3.2.0-2ubuntu0.1