OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
                
            Metrics
Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
|  Debian DLA | DLA-2992-1 | openvpn security update | 
|  Debian DLA | DLA-4079-1 | openvpn security update | 
|  EUVD | EUVD-2022-15669 | OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials. | 
|  Ubuntu USN | USN-5347-1 | OpenVPN vulnerability | 
|  Ubuntu USN | USN-6850-1 | OpenVPN vulnerability | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
                    Wed, 23 Apr 2025 19:15:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | ssvc 
 | 
 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: OpenVPN
Published:
Updated: 2025-04-23T18:46:01.507Z
Reserved: 2022-02-08T00:00:00.000Z
Link: CVE-2022-0547
 Vulnrichment
                        Vulnrichment
                    Updated: 2024-08-02T23:32:46.375Z
 NVD
                        NVD
                    Status : Modified
Published: 2022-03-18T18:15:12.017
Modified: 2025-04-23T19:15:52.743
Link: CVE-2022-0547
 Redhat
                        Redhat
                    No data.
 OpenCVE Enrichment
                        OpenCVE Enrichment
                    No data.