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AUSCERT External Security Bulletin Redistribution
ESB-2023.0462
USN-5825-1: PAM vulnerability
27 January 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: PAM
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-28321
Original Bulletin:
https://ubuntu.com/security/notices/USN-5825-1
Comment: CVSS (Max): 9.8 CVE-2022-28321 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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USN-5825-1: PAM vulnerability
25 January 2023
PAM would allow unintended access to the machine over network.
Releases
o Ubuntu 22.10
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o 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.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 22.10
o libpam-modules - 1.5.2-2ubuntu1.1
Ubuntu 22.04
o libpam-modules - 1.4.0-11ubuntu2.1
Ubuntu 20.04
o libpam-modules - 1.3.1-5ubuntu4.4
Ubuntu 18.04
o libpam-modules - 1.1.8-3.6ubuntu2.18.04.4
Ubuntu 16.04
o libpam-modules - 1.1.8-3.2ubuntu2.3+esm2
Available with Ubuntu Pro (Infra-only)
Ubuntu 14.04
o libpam-modules - 1.1.8-1ubuntu2.2+esm1
Available with Ubuntu Pro (Infra-only)
In general, a standard system update will make all the necessary changes.
References
o CVE-2022-28321
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