TI-2020-11856 Aliases CVE-2020-15078 GHSA-r2jp-995w-h282

Authentication bypass in OpenVPN

MEDIUM 41CWE-305Published 2021-04-26 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

EPSS 0.04948 92nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	OpenVPN	2.5.1 and earlier versions	—	No fix listed	CNA

OpenVPN Vendor— Affected 2.5.1 and earlier versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPE	Versions	Role	Vendor
cpe:2.3:a:openvpn:openvpn::::::::	before 2.4.11; 2.5.0 to before 2.5.2	Vulnerable	OpenVPN
cpe:2.3:o:fedoraproject:fedora:32:::::::*	32	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:33:::::::*	33	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:::::::*	34	Vulnerable	Fedoraproject
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	18.04	Vulnerable	Canonical
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::	20.04	Vulnerable	Canonical
cpe:2.3:o:canonical:ubuntu_linux:20.10:::::::*	20.10	Vulnerable	Canonical
cpe:2.3:o:canonical:ubuntu_linux:21.04:::::::*	21.04	Vulnerable	Canonical
cpe:2.3:o:debian:debian_linux:9.0:::::::*	9.0	Vulnerable	Debian

cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* Versions before 2.4.11; 2.5.0 to before 2.5.2 Vulnerable ·OpenVPN
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:* Versions 20.10 Vulnerable ·Canonical
cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* Versions 21.04 Vulnerable ·Canonical
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2020-15078
2026-10-03 Alias added: GHSA-r2jp-995w-h282

References

Patch 1

https://community.openvpn.net/openvpn/wiki/CVE-2020-15078

Advisory 6

Other 1

https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences