USN-2164-1: OpenSSH vulnerability

Publication date

7 April 2014

Overview

A malicious server could bypass OpenSSH SSHFP DNS record checking.


Packages

  • openssh - secure shell (SSH) for secure access to remote machines

Details

Matthew Vernon discovered that OpenSSH did not correctly check SSHFP DNS
records if a server presented an unacceptable host certificate. A malicious
server could use this issue to disable SSHFP checking.

Matthew Vernon discovered that OpenSSH did not correctly check SSHFP DNS
records if a server presented an unacceptable host certificate. A malicious
server could use this issue to disable SSHFP checking.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
13.10 saucy openssh-client –  1:6.2p2-6ubuntu0.3
12.10 quantal openssh-client –  1:6.0p1-3ubuntu1.2
12.04 precise openssh-client –  1:5.9p1-5ubuntu1.3

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