CVE Vulnerability

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

7.4 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements Vendor Advisory
https://community.openvpn.net/openvpn/wiki/CVE-2021-3547 Patch Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:openvpn:openvpn:3.6:*:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:3.6.1:*:*:*:*:*:*:*
Information

Published : 2021-07-12 11:15

Updated : 2022-10-27 12:22

NVD link : CVE-2021-3547

Mitre link : CVE-2021-3547

Products Affected
No products.
CWE
CWE-295

Improper Certificate Validation