OpenVPN Unprotected Management Interface

medium Nessus Plugin ID 21330

Synopsis

The remote VPN server can be managed remotely without authentication.

Description

The remote host is running OpenVPN, an open source SSL VPN.

The version of OpenVPN installed on the remote host does not require authentication to access the server's management interface. An attacker can leverage this issue to gain complete control over the affected application simply by telneting in.

Solution

Disable the management interface or bind it only to a specific address, such as 127.0.0.1.

See Also

https://www.securityfocus.com/archive/1/432863/30/60/threaded

https://openvpn.net/community-resources/reference-manual-for-openvpn-2-0/

Plugin Details

Severity: Medium

ID: 21330

File Name: openvpn_management_interface_accessible.nasl

Version: 1.19

Type: remote

Family: Misc.

Published: 5/8/2006

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.7

CVSS v2

Risk Factor: Medium

Base Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:P

Vulnerability Information

CPE: cpe:/a:openvpn:openvpn

Vulnerability Publication Date: 5/3/2006

Reference Information

CVE: CVE-2006-2229