Debian-LAN Vulnerability — Ubuntu Security Update (USN-9068-1)
USN-9068-1 updates Ubuntu 20.04, Ubuntu 22.04: Wolfgang Schweer discovered that Debian-LAN configured overly permissive ACLs for the Kerberos admin server. Apply the update via standard apt tooling.
What this means under a SharedLicense license
The advisory's own severity data peaks at CVSS ; unpatched Ubuntu 20.04, Ubuntu 22.04 servers remain exposed until updated.
-
USN-9068-1
Publication date
12 November 2026
Overview
Debian-LAN could allow users to change the Kerberos passwords of other
users.
Releases
Packages
- debian-lan-config – FAI config space and other configs for the Debian-LAN system
Details
Wolfgang Schweer discovered that Debian-LAN configured overly permissive
ACLs for the Kerberos admin server. An authenticated user could possibly
use this issue to change the credentials of other users, leading to
privilege escalation.
Wolfgang Schweer discovered that Debian-LAN configured overly permissive
ACLs for the Kerberos admin server. An authenticated user could possibly
use this issue to change the credentials of other users, leading to
privilege escalation.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.
The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 16.04 LTS xenial | debian-lan-config – 0.21ubuntu0.16.04.1~esm1 | ||
References
Related notices
Frequently Asked Questions
What does USN-9068-1 fix?
Which Ubuntu releases are covered?
How do I apply it?
Check your system for vulnerabilities
Select your product and operating system to see the exact fix commands that apply to you.
Check Your System