Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-7521

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
27/06/2017
Last modified:
20/04/2025

Description

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.90
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* 2.3.16 (including)
cpe:2.3:a:openvpn:openvpn:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.0:beta1:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.0:beta2:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.0:rc2:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:openvpn:openvpn:2.4.2:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools