Incorrect authorization in linux-pam - CVE-2022-28321
Published: January 25, 2023 / Updated: May 26, 2023
Vulnerability identifier: #VU71525
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-28321
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: git.kernel.org
Affected software:
linux-pam
linux-pam
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to an error within the pam_access.so module in Linux-PAM package, which does not correctly restrict login if a user tries to connect from an IP address that is not resolvable via DNS. A remote attacker can bypass authorization process and login to the system via SSH from IP addresses that were not allowed to connect from.
How to mitigate CVE-2022-28321
Install updates from vendor's website.