A MCabber security update has been released for Ubuntu Linux 16.04 LTS.

USN-4506-1: MCabber vulnerability

==========================================================================
Ubuntu Security Notice USN-4506-1
September 16, 2020

mcabber vulnerability
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

MCabber could be made to modify the roster and intercept messages if it
received specially crafted XMPP packets.

Software Description:
- mcabber: small Jabber (XMPP) console client

Details:

It was discovered that MCabber does not properly manage roster pushes. An
attacker could possibly use this issue to remotely perform
man-in-the-middle attacks. (CVE-2016-9928).

Update instructions:

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

Ubuntu 16.04 LTS:
mcabber 0.10.2-1+deb8u1build0.16.04.1

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

References:
  https://usn.ubuntu.com/4506-1
CVE-2016-9928

Package Information:
  https://launchpad.net/ubuntu/+source/mcabber/0.10.2-1+deb8u1build0.16.04.1