1. Ubuntu Security Notices
  2. USN-5825-1

USN-5825-1: PAM vulnerability

Publication date

25 January 2023

Overview

PAM would allow unintended access to the machine over network.

Releases

Packages

  • 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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
22.10 kinetic libpam-modules –  1.5.2-2ubuntu1.1
22.04 jammy libpam-modules –  1.4.0-11ubuntu2.1
20.04 focal libpam-modules –  1.3.1-5ubuntu4.4
18.04 bionic libpam-modules –  1.1.8-3.6ubuntu2.18.04.4
16.04 xenial libpam-modules –  1.1.8-3.2ubuntu2.3+esm2  
14.04 trusty libpam-modules –  1.1.8-1ubuntu2.2+esm1  

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References

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