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
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.