Detections
Analytics
OpenVPN < 2.0.1 Multiple Vulnerabilities (Windows)
medium Nessus Plugin ID 125261
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Synopsis
An application on the remote Windows host is affected by multiple vulnerabilities.Description
According to its self-reported version number, the version of OpenVPN installed on the remote Windows host is prior to 2.0.1. It is, therefore, affected by multiple vulnerabilities:- A denial of service (DoS) vulnerability exists in OpenVPN due to its OpenSSL error queue not being flushed properly.
An unauthenticated, remote attacker can exploit this issue, by sending a large number of incorrect connection requests, to cause the application to stop responding (CVE-2005-2531) & (CVE-2005-2532).
- OpenVPN is affected by a denial of service (DoS) vulnerability. An authenticated, remote attacker can exploit this issue, by sending a large of number of packets with spoofed MAC addresses, to cause the application to stop responding (CVE-2005-2533).
- A denial of service (DoS) vulnerability exists in OpenVPN when --duplicate-cn is not enabled. An unauthenticated, remote attacker can exploit this issue, by issuing simultaneous tcp connections from multiple clients that use the same certificate, to cause the application to stop responding (CVE-2005-2534).
Solution
Upgrade to OpenVPN 2.0.1 or later.See Also
Plugin Details
Severity: Medium
ID: 125261
File Name: openvpn_2_0_1.nasl
Version: 1.6
Type: local
Agent: windows
Family: Windows
Published: 5/17/2019
Updated: 10/31/2019
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2005-2532
CVSS v3
Risk Factor: Medium
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: 8/16/2005
Vulnerability Publication Date: 8/16/2005
Reference Information
CVE: CVE-2005-2531, CVE-2005-2532, CVE-2005-2533, CVE-2005-2534