In debian-lan-config < 0.26, configured too permissive ACLs for the Kerberos admin server allowed password changes for other Kerberos user principals.

For Debian 8 Jessie, this problem has been fixed in version 0.19+deb8u2.

We recommend that you upgrade your debian-lan-config packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS