OpenVPN < 2.3.15 Weak Cryptographic Cipher Vulnerability (Windows)

medium Nessus Plugin ID 125226

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Synopsis

An application on the remote Windows host is affected by a weak cryptographic cipher vulnerability.

Description

According to its self-reported version number, the version of OpenVPN installed on the remote Windows host is prior to 2.3.15. It is, therefore, affected by a weak cryptographic cipher vulnerability. OpenVPN's default cipher, BF-CBC, is vulnerable to plaintext recovery when enough cipher text has been observed. An unauthenticated, remote attacker can exploit this issue, to decrypt data being sent to OpenVPN.

Solution

Upgrade to OpenVPN 2.3.15 or later.

Plugin Details

Severity: Medium

ID: 125226

File Name: openvpn_2_3_15.nasl

Version: 1.6

Type: local

Agent: windows

Family: Windows

Published: 5/16/2019

Updated: 12/5/2022

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2016-6329

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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 Ease: No known exploits are available

Patch Publication Date: 5/22/2017

Vulnerability Publication Date: 5/22/2017

Reference Information

CVE: CVE-2016-6329

Detections

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