← Back to CVEs

CVE-2022-0547

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/18/2022

Last Modified11/3/2025

Sourcenvd

Honeypot Sightings0

Affected Products

debian:debian_linuxfedoraproject:fedoraopenvpn:openvpn

Weaknesses (CWE)

CWE-305CWE-287

References

https://community.openvpn.net/openvpn/wiki/CVE-2022-0547(security@openvpn.net)

https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements(security@openvpn.net)

https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html(security@openvpn.net)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/(security@openvpn.net)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/(security@openvpn.net)

https://openvpn.net/community-downloads/(security@openvpn.net)

https://community.openvpn.net/openvpn/wiki/CVE-2022-0547(af854a3a-2127-422b-91ae-364da2661108)

https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/(af854a3a-2127-422b-91ae-364da2661108)

https://openvpn.net/community-downloads/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.