// For flags

CVE-2021-27406

PerFact OpenVPN-Client

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An attacker can take leverage on PerFact OpenVPN-Client versions 1.4.1.0 and prior to send the config command from any application running on the local host machine to force the back-end server into initializing a new open-VPN instance with arbitrary open-VPN configuration. This could result in the attacker achieving execution with privileges of a SYSTEM user.

Un atacante puede aprovechar PerFact OpenVPN-Client versiones 1.4.1.0 y anteriores, para enviar el comando config desde cualquier aplicación que sea ejecutada en el equipo anfitrión local para forzar al servidor back-end a inicializar una nueva instancia de Open-VPN con una configuración arbitraria de Open-VPN. Esto podría resultar en que el atacante logre una ejecución con privilegios de un usuario SYSTEM

*Credits: Sharon Brizinov of Claroty reported this vulnerability to CISA.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-02-19 CVE Reserved
  • 2022-10-14 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-15: External Control of System or Configuration Setting
  • CWE-610: Externally Controlled Reference to a Resource in Another Sphere
CAPEC
References (1)
URL Tag Source
https://www.cisa.gov/uscert/ics/advisories/icsa-21-056-01 Third Party Advisory
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Perfact
Search vendor "Perfact"
 Openvpn-client
Search vendor "Perfact" for product "Openvpn-client"
 <= 1.4.1.0
Search vendor "Perfact" for product "Openvpn-client" and version " <= 1.4.1.0"
-
Affected