critical
CVE-2022-28321
pam: authentication bypass for SSH logins
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (high), Ubuntu (low).
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 and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| root.io ubuntu 20.04 | rootio-pam | 1.3.1-5ubuntu4.4 |
| root.io ubuntu 22.04 | rootio-pam | 1.4.0-11ubuntu2.1 |
| ubuntu 14.04-ESM | pam | 1.1.8-1ubuntu2.2+esm1 |
| ubuntu 16.04-ESM | pam | 1.1.8-3.2ubuntu2.3+esm2 |
| ubuntu 18.04 | pam | 1.1.8-3.6ubuntu2.18.04.4 |
| ubuntu 18.04-ESM | pam | 1.1.8-3.6ubuntu2.18.04.4 |
| ubuntu 20.04 | pam | 1.3.1-5ubuntu4.4 |
| ubuntu 20.04-ESM | pam | 1.3.1-5ubuntu4.4 |
| ubuntu 22.04 | pam | 1.4.0-11ubuntu2.1 |
| ubuntu 22.10 | pam | 1.5.2-2ubuntu1.1 |
References
- http://download.opensuse.org/source/distribution/openSUSE-current/repo/oss/src/
- https://access.redhat.com/security/cve/CVE-2022-28321
- https://bugzilla.suse.com/show_bug.cgi?id=1197654
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://github.com/linux-pam/linux-pam/pull/447
- https://nvd.nist.gov/vuln/detail/CVE-2022-28321
- https://ubuntu.com/security/notices/USN-5825-1
- https://ubuntu.com/security/notices/USN-5825-2