USN-2164-1: OpenSSH vulnerability

7 April 2014

A malicious server could bypass OpenSSH SSHFP DNS record checking.

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Releases

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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 13.10
Ubuntu 12.10
Ubuntu 12.04

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

References

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Further reading