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Ubuntu Security Notice USN-6719-2

Ubuntu Security Notice USN-6719-2
Posted Apr 10, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6719-2 - USN-6719-1 fixed a vulnerability in util-linux. Unfortunately, it was discovered that the fix did not fully address the issue. This update removes the setgid permission bit from the wall and write utilities. Skyler Ferrante discovered that the util-linux wall command did not filter escape sequences from command line arguments. A local attacker could possibly use this issue to obtain sensitive information.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2024-28085
SHA-256 | ecc9ce4c4b883659f1ca7166c8fbbec41ccb6264494ba71cb4e9a807cd993345

Ubuntu Security Notice USN-6719-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6719-2
April 10, 2024

util-linux vulnerability
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

util-linux could be made to expose sensitive information.

Software Description:
- util-linux: miscellaneous system utilities

Details:

USN-6719-1 fixed a vulnerability in util-linux. Unfortunately, it was
discovered that the fix did not fully address the issue. This update
removes the setgid permission bit from the wall and write utilities.

Original advisory details:

Skyler Ferrante discovered that the util-linux wall command did not filter
escape sequences from command line arguments. A local attacker could
possibly use this issue to obtain sensitive information.

Update instructions:

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

Ubuntu 23.10:
util-linux 2.39.1-4ubuntu2.2

Ubuntu 22.04 LTS:
util-linux 2.37.2-4ubuntu3.4

Ubuntu 20.04 LTS:
util-linux 2.34-0.1ubuntu9.6

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

References:
https://ubuntu.com/security/notices/USN-6719-2
https://ubuntu.com/security/notices/USN-6719-1
CVE-2024-28085

Package Information:
https://launchpad.net/ubuntu/+source/util-linux/2.39.1-4ubuntu2.2
https://launchpad.net/ubuntu/+source/util-linux/2.37.2-4ubuntu3.4
https://launchpad.net/ubuntu/+source/util-linux/2.34-0.1ubuntu9.6

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