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Ubuntu Security Notice USN-6588-1

Ubuntu Security Notice USN-6588-1
Posted Jan 18, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6588-1 - Matthias Gerstner discovered that the PAM pam_namespace module incorrectly handled special files when performing directory checks. A local attacker could possibly use this issue to cause PAM to stop responding, resulting in a denial of service.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2024-22365
SHA-256 | 01b72c7835037ae651f0e64333340d75271e1c9cf94dfe7c92d80f644b525526

Ubuntu Security Notice USN-6588-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6588-1
January 17, 2024

pam vulnerability
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

PAM could be made to stop responding if it opened a specially crafted file.

Software Description:
- pam: Pluggable Authentication Modules

Details:

Matthias Gerstner discovered that the PAM pam_namespace module incorrectly
handled special files when performing directory checks. A local attacker
could possibly use this issue to cause PAM to stop responding, resulting in
a denial of service.

Update instructions:

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

Ubuntu 23.10:
libpam-modules 1.5.2-6ubuntu1.1

Ubuntu 23.04:
libpam-modules 1.5.2-5ubuntu1.1

Ubuntu 22.04 LTS:
libpam-modules 1.4.0-11ubuntu2.4

Ubuntu 20.04 LTS:
libpam-modules 1.3.1-5ubuntu4.7

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

References:
https://ubuntu.com/security/notices/USN-6588-1
CVE-2024-22365

Package Information:
https://launchpad.net/ubuntu/+source/pam/1.5.2-6ubuntu1.1
https://launchpad.net/ubuntu/+source/pam/1.5.2-5ubuntu1.1
https://launchpad.net/ubuntu/+source/pam/1.4.0-11ubuntu2.4
https://launchpad.net/ubuntu/+source/pam/1.3.1-5ubuntu4.7

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