[USN-6664-1] less vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Tue Feb 27 18:37:33 UTC 2024

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)


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

Software Description:
- less: pager program similar to more


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.


Package Information:

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