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.

CVSS v3 7.4 HIGH
CVSS v2.0 5.8 MEDIUM

7.4^/10

CVSS v3 : HIGH

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

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

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

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2021-07-12 11:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-3547

Mitre link : CVE-2021-3547

CVE.ORG link : CVE-2021-3547

JSON object : View

Products Affected

openvpn

openvpn

CWE

CWE-295

Improper Certificate Validation

CWE-305

Authentication Bypass by Primary Weakness

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