CVE-2022-0547

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.

Categories

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.61%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory openvpn.net Vendor Advisory openvpn.net Vendor Advisory openvpn.net
Affected: n/a OpenVPN
Published at:
Updated at:

References

Link Tags
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements vendor advisory
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547 vendor advisory
https://openvpn.net/community-downloads/ patch vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/ vendor advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2022-0547?
CVE-2022-0547 has been scored as a critical severity vulnerability.
How to fix CVE-2022-0547?
To fix CVE-2022-0547, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-0547 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-0547 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-0547?
CVE-2022-0547 affects n/a OpenVPN.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.