SB2023020603 - Ubuntu update for pam
Published: February 6, 2023 Updated: May 26, 2023
Security Bulletin ID
SB2023020603
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Incorrect authorization (CVE-ID: CVE-2022-28321)
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.
Remediation
Install update from vendor's website.