Ubuntu 12.04 LTS: 1707-1 Critical: libssh Denial of Service Attack

ubuntu

January 28, 2013

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

Summary

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

traffic.

Software Description:

- libssh: A tiny C SSH library

Details:

Yong Chuan Koh discovered that libssh incorrectly handled certain

negotiation requests. A remote attacker could use this to cause libssh to

crash, resulting in a denial of service.

Topics Covered

security advisory denial of service critical ubuntu libssh

Update Instructions

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

Ubuntu 12.10:
  libssh-4                        0.5.2-1ubuntu0.12.10.2

Ubuntu 12.04 LTS:
  libssh-4                        0.5.2-1ubuntu0.12.04.2

Ubuntu 11.10:
  libssh-4                        0.5.2-1ubuntu0.11.10.2

Ubuntu 10.04 LTS:
  libssh-4                        0.4.2-1ubuntu1.2

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