A Security researcher has found a vulnerability in Ubuntu 18.04 Debian-LAN.

Debian-LAN could be made to change Kerberos user passwords on run program as an root privileges.

Wolfgang Schweer discovered that Debian-LAN did not properly handle ACLs
for the Kerberos admin server. A local attacker could possibly use this
issue to change the passwords of other users, leading to root privilege
escalation. (CVE-2019-3467)

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

debian-lan-config 0.23+deb9u1build0.18.04.1

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

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