CVE-2020-15078

Publication date 26 April 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvpn	22.04 LTS jammy	Fixed 2.5.1-2
	21.10 impish	Fixed 2.5.1-2
	21.04 hirsute	Fixed 2.5.1-1ubuntu1.1
	20.10 groovy	Fixed 2.4.9-3ubuntu1.1
	20.04 LTS focal	Fixed 2.4.7-1ubuntu2.20.04.2
	18.04 LTS bionic	Fixed 2.4.4-2ubuntu1.5
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Patch details

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

Package	Patch details
openvpn	Upstream: f7b3bf0 Upstream: 3d18e30 Upstream: 3aca477 Upstream: 0e5516a

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-4933-1
OpenVPN vulnerabilities
4 May 2021