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.
References (7)
Core 7
Core References
Vendor Advisory x_refsource_misc
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
Vendor Advisory x_refsource_misc
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
Patch, Vendor Advisory x_refsource_misc
https://openvpn.net/community-downloads/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
Scores
CVSS v3
9.8
EPSS
0.0352
EPSS Percentile
87.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-305
CWE-287
Status
published
Products (4)
debian/debian_linux
9.0
fedoraproject/fedora
34
fedoraproject/fedora
36
openvpn/openvpn
2.1.0 - 2.4.12
Published
Mar 18, 2022
Tracked Since
Feb 18, 2026