Vulnerability · Published Sep 19, 2022 · Assigned by mitre
CVE-2022-28321
Critical 9.8
In plain English
A critical-severity improper authentication in the pam package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
The Linux-PAM package before 1.5.2-6.1 for openSUSE Tumbleweed allows authentication bypass for SSH logins. The pam_access.so module doesn't correctly restrict login if a user tries to connect from an IP address that is not resolvable via DNS. In such conditions, a user with denied access to a machine can still get access. NOTE: the relevance of this issue is largely limited to openSUSE Tumbleweed and openSUSE Factory; it does not affect Linux-PAM upstream.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | pam | 1.4.0-11ubuntu2.1 | USN-5825-1 |
| Ubuntu:22.04:LTS | pam | 1.4.0-11ubuntu2.3 | USN-5825-2 |
| Ubuntu:22.04:LTS | pam | 1.4.0-11ubuntu2.1 | UBUNTU-CVE-2022-28321 |
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H