CVE-2017-7521

Severity Score

5.9

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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().

Las versiones de OpenVPN anteriores a 2.4.3 y 2.3.17, son vulnerables a una denegación de servicio remota debido a un agotamiento de memoria causado por pérdida de memoria y un problema de doble liberación (Double Free) en la función extract_x509_extension().

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-04-05 CVE Reserved
2017-06-22 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-415: Double Free
CWE-772: Missing Release of Resource after Effective Lifetime

CAPEC

References (4)

URL	Tag	Source
http://www.securityfocus.com/bid/99230	Third Party Advisory
http://www.securitytracker.com/id/1038768	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.debian.org/security/2017/dsa-3900	2019-10-03
https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243	2019-10-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				<= 2.3.16 Search vendor "Openvpn" for product "Openvpn" and version " <= 2.3.16"		-		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		-		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		alpha2		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		beta1		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		beta2		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		rc1		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0"		rc2		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.1 Search vendor "Openvpn" for product "Openvpn" and version "2.4.1"		-		Affected
Openvpn Search vendor "Openvpn"		Openvpn Search vendor "Openvpn" for product "Openvpn"				2.4.2 Search vendor "Openvpn" for product "Openvpn" and version "2.4.2"		-		Affected