=========================================================================Ubuntu Security Notice USN-2478-1
January 19, 2015

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

libssh could be made to crash if it received specially crafted network
traffic.

Software Description:
- libssh: A tiny C SSH library

Details:

It was discovered that libssh incorrectly handled certain kexinit packets.
A remote attacker could possibly use this issue to cause libssh to crash,
resulting in a denial of service.

Update instructions:

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

Ubuntu 14.10:
  libssh-4                        0.6.3-2ubuntu1.1

Ubuntu 14.04 LTS:
  libssh-4                        0.6.1-0ubuntu3.1

Ubuntu 12.04 LTS:
  libssh-4                        0.5.2-1ubuntu0.12.04.4

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2478-1
  CVE-2014-8132

Package Information:
  https://launchpad.net/ubuntu/+source/libssh/0.6.3-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.1
  https://launchpad.net/ubuntu/+source/libssh/0.5.2-1ubuntu0.12.04.4