Vulnerability Details : CVE-2021-3547
OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.
Products affected by CVE-2021-3547
- cpe:2.3:a:openvpn:openvpn:3.6:*:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:3.6.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3547
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3547
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2021-3547
-
The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
-
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.Assigned by: security@openvpn.net (Secondary)
References for CVE-2021-3547
-
https://community.openvpn.net/openvpn/wiki/CVE-2021-3547
Just a moment...Patch;Vendor Advisory
-
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
Just a moment...Vendor Advisory
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