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CVE-2017-7521

Good to know:

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Date: June 27, 2017

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().

Language: C

Severity Score

Related Resources (8)

http://www.securitytracker.com/id/1038768
https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243
https://nvd.nist.gov/vuln/detail/CVE-2017-7521
http://www.securityfocus.com/bid/99230
http://www.debian.org/security/2017/dsa-3900
https://security-tracker.debian.org/tracker/CVE-2017-7521
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-7521
https://www.mend.io/vulnerability-database/CVE-2017-7521

Severity Score

Weakness Type (CWE)

Double Free

CWE-415

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Missing Release of Resource after Effective Lifetime

CWE-772

Top Fix

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Upgrade Version

Upgrade to version 2.4.3,2.3.17

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CVSS v3.1

Base Score:
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

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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