Ubuntu Security Notice USN-5811-2
January 18, 2023
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM
Sudo could be made to possibly edit arbitrary files
if it received a specially crafted input.
– sudo: Provide limited super user privileges to specific users
USN-5811-1 fixed a vulnerability in Sudo. This update provides
the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
Matthieu Barjole and Victor Cutillas discovered that Sudo incorrectly
handled user-specified editors when using the sudoedit command. A local
attacker that has permission to use the sudoedit command could possibly use
this issue to edit arbitrary files. (CVE-2023-22809)
The problem can be corrected by updating your system to the following
Ubuntu 16.04 ESM:
In general, a standard system update will make all the necessary changes.