Ubuntu 22.10 USN-5825-1 Moderate: PAM Network Access Threat

ubuntu

January 25, 2023

PAM would allow unintended access to the machine over network.

Summary

PAM would allow unintended access to the machine over network.

Software Description:

- pam: Pluggable Authentication Modules

Details:

It was discovered that PAM did not correctly restrict login from an IP

address that is not resolvable via DNS. An attacker could possibly use this

issue to bypass authentication.

Topics Covered

security advisory security issue Ubuntu system update authentication bypass network access pam

Update Instructions

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

Ubuntu 22.10:
  libpam-modules                  1.5.2-2ubuntu1.1

Ubuntu 22.04 LTS:
  libpam-modules                  1.4.0-11ubuntu2.1

Ubuntu 20.04 LTS:
  libpam-modules                  1.3.1-5ubuntu4.4

Ubuntu 18.04 LTS:
  libpam-modules                  1.1.8-3.6ubuntu2.18.04.4

Ubuntu 16.04 ESM:
  libpam-modules                  1.1.8-3.2ubuntu2.3+esm2

Ubuntu 14.04 ESM:
  libpam-modules                  1.1.8-1ubuntu2.2+esm1

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