Is CVE-2022-28321 in the CISA KEV catalog?

No. CVE-2022-28321 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-28321?

CVE-2022-28321 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-28321?

CVE-2022-28321 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-28321?

Upgrade libpam-modules on ubuntu 14.04 to 1.1.8-1ubuntu2.2+esm1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-28321

CRITICAL

9.8

CVSS v3

NVD

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.

CWE-287Improper Authentication

How to fix

Remediation Available

libpam-modulesUbuntu

Fixed in:1.1.8-1ubuntu2.2+esm1USN-5825-1

Fixed in:1.1.8-1ubuntu2.2+esm3USN-5825-2

Fixed in:1.1.8-3.2ubuntu2.3+esm4USN-5825-2

Fixed in:1.1.8-3.2ubuntu2.3+esm2USN-5825-1

Fixed in:1.1.8-3.6ubuntu2.18.04.6USN-5825-2

Fixed in:1.1.8-3.6ubuntu2.18.04.4USN-5825-1

Fixed in:1.3.1-5ubuntu4.4USN-5825-1

Fixed in:1.3.1-5ubuntu4.6USN-5825-2

Fixed in:1.4.0-11ubuntu2.1USN-5825-1

Fixed in:1.4.0-11ubuntu2.3USN-5825-2

Fixed in:1.5.2-2ubuntu1.3USN-5825-2

Fixed in:1.5.2-2ubuntu1.1USN-5825-1

pamUbuntu

Fixed in:1.1.8-1ubuntu2.2+esm3USN-5825-2

Fixed in:1.1.8-1ubuntu2.2+esm1USN-5825-1

Fixed in:1.1.8-3.2ubuntu2.3+esm2USN-5825-1

Fixed in:1.1.8-3.2ubuntu2.3+esm4USN-5825-2

Fixed in:1.1.8-3.6ubuntu2.18.04.4USN-5825-1

Fixed in:1.1.8-3.6ubuntu2.18.04.6USN-5825-2

Fixed in:1.3.1-5ubuntu4.4USN-5825-1

Fixed in:1.3.1-5ubuntu4.6USN-5825-2

Fixed in:1.4.0-11ubuntu2.1USN-5825-1

Fixed in:1.4.0-11ubuntu2.3USN-5825-2

Fixed in:1.5.2-2ubuntu1.3USN-5825-2

Fixed in:1.5.2-2ubuntu1.1USN-5825-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Patch2

Vendor Advisory1

suse.com

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-29.