CVE-2017-7520

Publication date 21 June 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvpn	17.04 zesty	Fixed 2.4.0-4ubuntu1.3
	16.10 yakkety	Fixed 2.3.11-1ubuntu2.1
	16.04 LTS xenial	Fixed 2.3.10-1ubuntu2.1
	14.04 LTS trusty	Fixed 2.3.2-7ubuntu3.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
openvpn	Upstream: 7718c89 Upstream: 043fe32 Upstream: f38a4a1 Upstream: 4bec9d2

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.4 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.4 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3339-2
OpenVPN vulnerability
7 August 2017

USN-3339-1
OpenVPN vulnerabilities
22 June 2017