Detections
Analytics

OpenVPN Server versions 2.6.1 <= 2.6.13 DoS

high Nessus Plugin ID 233860

Synopsis

An application on the remote host is affected by a denial of service vulnerability.

Description

OpenVPN from 2.6.1 through 2.6.13, setup with tls-crypt-v2. is affected by a denial of service vulnerability. A local attacker who can monitor network traffic, can inject specially crafted packets during the tls-crypt2-v2 handshake and corrupt the server.

Solution

Upgrade to OpenVPN Server 2.6.14 or later.

See Also

http://www.nessus.org/u?395dd159

https://www.openwall.com/lists/oss-security/2025/04/02/5

Plugin Details

Severity: High

ID: 233860

File Name: openvpn_2_6_14.nasl

Version: 1.1

Type: local

Agent: windows

Family: Windows

Published: 4/4/2025

Updated: 4/4/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS Score Source: CVE-2025-2704

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/a:openvpn:openvpn

Required KB Items: installed_sw/OpenVPN Server

Patch Publication Date: 4/2/2025

Vulnerability Publication Date: 4/2/2025

Reference Information

CVE: CVE-2025-2704

CWE: 754

IAVA: 2025-A-0219