OpenVPN Server 2.0.x < 2.0.4 Denial of Service Vulnerability

Medium Nessus Plugin ID 128773

Synopsis

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

Description

According to its self-reported version number, the version of OpenVPN server installed on the remote Windows host is version 2.0.x prior to 2.0.4. It is, therefore, affected by a denial of service (DoS) vulnerability in its TCP/IP accept function component. An unauthenticated, remote attacker can exploit this issue, by forcing the accept function to return an error status which leads to a null dereference in an exception handler, to cause the application to stop responding.

Solution

Upgrade to OpenVPN 2.0.4 or later.

See Also

http://openvpn.net/changelog.html

Plugin Details

Severity: Medium

ID: 128773

File Name: openvpn_2_0_4.nasl

Version: 1.3

Type: local

Agent: windows

Family: Windows

Published: 2019/09/16

Updated: 2019/10/17

Dependencies: 125356

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2005-3409

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 5.3

Temporal Score: 4.6

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openvpn:openvpn

Required KB Items: installed_sw/OpenVPN Server

Exploit Available: true

Exploit Ease: No exploit is required

Patch Publication Date: 2005/11/01

Vulnerability Publication Date: 2005/11/01

Reference Information

CVE: CVE-2005-3409

BID: 15270