A Debian-LAN security update has been released for Ubuntu Linux 18.04 LTS.

USN-4530-1: Debian-LAN vulnerabilities

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Ubuntu Security Notice USN-4530-1
September 22, 2020

debian-lan-config vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Debian-LAN could be made to change Kerberos user passwords or run programs
as an administrator.

Software Description:
- debian-lan-config: FAI config space for the Debian-LAN system

Details:

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)

Update instructions:

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

Ubuntu 18.04 LTS:
debian-lan-config 0.23+deb9u1build0.18.04.1

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

References:
  https://usn.ubuntu.com/4530-1
CVE-2019-3467

Package Information:
  https://launchpad.net/ubuntu/+source/debian-lan-config/0.23+deb9u1build0.18.04.1