==========================================================================
Ubuntu Security Notice USN-4327-1
April 09, 2020

libssh vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 19.10
– Ubuntu 18.04 LTS

Summary:

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

Software Description:
– libssh: A tiny C SSH library

Details:

Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A
remote attacker could possibly use this issue to cause libssh to crash,
resulting in a denial of service.

Update instructions:

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

Ubuntu 19.10:
libssh-4 0.9.0-1ubuntu1.4

Ubuntu 18.04 LTS:
libssh-4 0.8.0~20170825.94fa1e38-1ubuntu0.6

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

References:
https://usn.ubuntu.com/4327-1
CVE-2020-1730

Package Information:
https://launchpad.net/ubuntu/+source/libssh/0.9.0-1ubuntu1.4
https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.6

—–BEGIN PGP SIGNATURE—–
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=O1yN
—–END PGP SIGNATURE—–
—