// For flags

CVE-2021-3547

 

Severity Score

7.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

OpenVPN 3 Core Library versiones 3.6 y 3.6.1, permiten a un atacante tipo "man-in-the-middle" omitir la autenticación de certificados al emitir un certificado de servidor no relacionado usando el mismo nombre de host encontrado en la opción verify-x509-name en la configuración de un cliente

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-05-11 CVE Reserved
  • 2021-07-12 CVE Published
  • 2024-03-27 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
  • CWE-305: Authentication Bypass by Primary Weakness
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openvpn
Search vendor "Openvpn"
 Openvpn
Search vendor "Openvpn" for product "Openvpn"
 3.6
Search vendor "Openvpn" for product "Openvpn" and version "3.6"
-
Affected
Openvpn
Search vendor "Openvpn"
 Openvpn
Search vendor "Openvpn" for product "Openvpn"
 3.6.1
Search vendor "Openvpn" for product "Openvpn" and version "3.6.1"
-
Affected