[USN-2912-1] libssh vulnerabilities
marc.deslauriers at canonical.com
Tue Feb 23 15:03:56 UTC 2016
Ubuntu Security Notice USN-2912-1
February 23, 2016
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Several security issues were fixed in libssh.
- libssh: A tiny C SSH library
Mariusz Ziulek discovered that libssh incorrectly handled certain packets.
A remote attacker could possibly use this issue to cause libssh to crash,
resulting in a denial of service.
Aris Adamantiadis discovered that libssh incorrectly generated ephemeral
secret keys of 128 bits instead of the recommended 1024 or 2048 bits when
using the diffie-hellman-group1 and diffie-hellman-group14 methods. If a
remote attacker were able to perform a man-in-the-middle attack, this flaw
could be exploited to view sensitive information. (CVE-2016-0739)
The problem can be corrected by updating your system to the following
Ubuntu 14.04 LTS:
Ubuntu 12.04 LTS:
In general, a standard system update will make all the necessary changes.
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