CVE-2022-0547 is a critical authentication bypass vulnerability affecting OpenVPN versions 2.1 through 2.4.12 and 2.5.6, specifically when multiple external authentication plugins utilize deferred authentication replies. This flaw allows an unauthenticated attacker to gain unauthorized access with only partially correct credentials, posing a significant risk to affected Debian, Fedora, and OpenVPN installations. With a CVSS score of 9.8 (CRITICAL), it represents an easily exploitable network-based attack with high impact on confidentiality, integrity, and availability. While no public exploit code, Metasploit modules, or active exploitation have been identified, and community discussion is minimal, the high severity warrants immediate patching.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.1.0, < 2.4.12CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* | ||
>= 2.5.0, < 2.5.6CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
36CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.