CVE-2022-0547

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.

Score

CVSS 3.1 9.8 Critical

Status

Modified - security@openvpn.net

Published

2022-03-18

Last modified

2025-11-03

Weaknesses

CWE-287, CWE-305

Affected products

• Debian Linux (Debian)
• Fedora (Fedoraproject)
• Openvpn (Openvpn)

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.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJH…
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4M…
• https://openvpn.net/community-downloads/
• https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html