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Ubuntu Security Notice USN-6664-1
February 27, 2024

less vulnerability

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

• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS (Available with Ubuntu Pro)
• Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

less could be made to crash or run arbitrary commands if it receive
a crafted input.

Software Description:

• less: pager program similar to more

Details:

It was discovered that less incorrectly handled certain file names.
An attacker could possibly use this issue to cause a crash or execute
arbitrary commands.

Update instructions:

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

Ubuntu 23.10:
less 590-2ubuntu0.23.10.1

Ubuntu 22.04 LTS:
less 590-1ubuntu0.22.04.2

Ubuntu 20.04 LTS:
less 551-1ubuntu0.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
less 487-0.1ubuntu0.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
less 481-2.1ubuntu0.2+esm1

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

References:
https://ubuntu.com/security/notices/USN-6664-1
CVE-2022-48624

Package Information:
https://launchpad.net/ubuntu/+source/less/590-2ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/less/590-1ubuntu0.22.04.2
https://launchpad.net/ubuntu/+source/less/551-1ubuntu0.2