CVE-2022-0547

9.8 CRITICAL
Published: March 18, 2022 Modified: November 03, 2025
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
Source: security@openvpn.net
Vendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
Source: security@openvpn.net
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
Source: security@openvpn.net
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
Source: security@openvpn.net
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
Source: security@openvpn.net
https://openvpn.net/community-downloads/
Source: security@openvpn.net
Patch Vendor Advisory
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
Source: af854a3a-2127-422b-91ae-364da2661108
https://openvpn.net/community-downloads/
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory

13 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.6%
69th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-305 CWE-287

Affected Vendors

debian openvpn fedoraproject

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