A Memcached security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, and 20.04 LTS.

[USN-6382-1] Memcached vulnerability

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Ubuntu Security Notice USN-6382-1
September 19, 2023

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Memcached could be made to denial of service.

Software Description:
- memcached: High-performance in-memory object caching system

Details:

It was discovered that Memcached incorrectly handled certain multi-packet
uploads in UDP. An attacker could possibly use this issue to cause a
denial of service.

Update instructions:

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

Ubuntu 20.04 LTS:
memcached 1.5.22-2ubuntu0.3

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
memcached 1.5.6-0ubuntu1.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
memcached 1.4.25-2ubuntu1.5+esm1

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

References:
https://ubuntu.com/security/notices/USN-6382-1
CVE-2022-48571

Package Information:
https://launchpad.net/ubuntu/+source/memcached/1.5.22-2ubuntu0.3