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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2022-0547

CVE-2022-0547

CRITICAL9.8

OpenVPN 2

Published Mar 18, 2022

Modified 4 months ago

Details

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.

References

https://community.openvpn.net/openvpn/wiki/CVE-2022-0547

https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements

https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html

https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/

https://openvpn.net/community-downloads/

https://www.cve.org/CVERecord?id=CVE-2022-0547

CVSS Analysis

CVSS v3.1

9.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedMar 18, 2022

ModifiedNov 3, 2025

CVE-2022-0547 | Mondoo Vulnerability Intelligence