Home/CVE/OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on
CVE

CVE-2020-15078

OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on

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.

HIGH · CVSS 7.5 EPSS 0.00492
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-305Authentication Bypass by Primary Weakness
CWE-306Missing Authentication for Critical Function
▤

Affected Products & Versions

5
openvpn< 2.4.11
openvpn>= 2.5.0 and < 2.5.2
fedoraproject fedoraall versions
canonical ubuntu linuxall versions
debian linuxall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@openvpn.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Apr 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:11128-1
suse-csafopenSUSE-SU-2021:0734-1
suse-csafSUSE-SU-2021:14723-1
suse-csafSUSE-SU-2021:1576-1
suse-csafSUSE-SU-2021:1577-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://community.openvpn.net/openvpn/wiki/CVE-2020-15078PatchVendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncementsBroken Link
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/
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