Ubuntu Security Notice 2869-1 - It was discovered that the OpenSSH client experimental support for resuming connections contained multiple security issues. A malicious server could use this issue to leak client memory to the server, including private client user keys.
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Ubuntu Security Notice USN-2869-1
January 14, 2016
openssh vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary:
OpenSSH could be made to expose sensitive information over the network.
Software Description:
- openssh: secure shell (SSH) for secure access to remote machines
Details:
It was discovered that the OpenSSH client experimental support for resuming
connections contained multiple security issues. A malicious server could
use this issue to leak client memory to the server, including private
client user keys.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.10:
openssh-client 1:6.9p1-2ubuntu0.1
Ubuntu 15.04:
openssh-client 1:6.7p1-5ubuntu1.4
Ubuntu 14.04 LTS:
openssh-client 1:6.6p1-2ubuntu2.4
Ubuntu 12.04 LTS:
openssh-client 1:5.9p1-5ubuntu1.8
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2869-1
CVE-2016-0777, CVE-2016-0778
Package Information:
https://launchpad.net/ubuntu/+source/openssh/1:6.9p1-2ubuntu0.1
https://launchpad.net/ubuntu/+source/openssh/1:6.7p1-5ubuntu1.4
https://launchpad.net/ubuntu/+source/openssh/1:6.6p1-2ubuntu2.4
https://launchpad.net/ubuntu/+source/openssh/1:5.9p1-5ubuntu1.8