CVE-2022-0547
9.8
CRITICAL · CVSS 3.1 · EPSS 3.6% (pctl 89)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.57% — more likely to be exploited than 89% of all CVEs |
| Weakness | CWE-305 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2022-03-18 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| debian | debian linux |
| fedoraproject | fedora |
| 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/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
- https://openvpn.net/community-downloads/
- 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.debian.org/debian-lts-announce/2025/03/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
- https://openvpn.net/community-downloads/
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