A libICE security update has been released for Ubuntu Linux 16.04 ESM and 18.04 LTS.

USN-5744-1: libICE vulnerability

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Ubuntu Security Notice USN-5744-1
November 28, 2022

libice vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

Weak session cookies generated using libICE could allow sensitive
information to be exposed.

Software Description:
- libice: X11 Inter-Client Exchange library (development headers)

Details:

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.

Update instructions:

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

Ubuntu 18.04 LTS:
libice-dev 2:1.0.9-2ubuntu0.18.04.1
libice6 2:1.0.9-2ubuntu0.18.04.1

Ubuntu 16.04 ESM:
libice-dev 2:1.0.9-1ubuntu0.16.04.1+esm1
libice6 2:1.0.9-1ubuntu0.16.04.1+esm1

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

References:
  https://ubuntu.com/security/notices/USN-5744-1
CVE-2017-2626

Package Information:
  https://launchpad.net/ubuntu/+source/libice/2:1.0.9-2ubuntu0.18.04.1