CVE-2018-7544
Severity CVSS v4.0:
Pending analysis
Type:
CWE-134
Format String Vulnerability
Publication date:
16/03/2018
Last modified:
05/08/2024
Description
A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning
Impact
Base Score 3.x
9.10
Severity 3.x
CRITICAL
Base Score 2.0
6.40
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* | 2.4.5 (including) |
To consult the complete list of CPE names with products and versions, see this page