Ubuntu Security Notice USN-5744-1
November 28, 2022
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
– Ubuntu 16.04 ESM
Weak session cookies generated using libICE could allow sensitive
information to be exposed.
– libice: X11 Inter-Client Exchange library (development headers)
It was discovered that libICE was using a weak mechanism to generate the
session cookies. A local attacker could possibly use this issue to perform
a privilege escalation attack.
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
Ubuntu 16.04 ESM:
In general, a standard system update will make all the necessary changes.