7.5
HIGH
CVE-2020-15078
OpenVPN Authentication Bypass in Server with Deferred Authentication
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.

INFO

Published Date :

April 26, 2021, 2:15 p.m.

Last Modified :

Nov. 21, 2024, 5:04 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2020-15078 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-15078 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Canonical ubuntu_linux
1 Fedoraproject fedora
1 Debian debian_linux
1 Openvpn openvpn
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-15078.

URL Resource
https://community.openvpn.net/openvpn/wiki/CVE-2020-15078 Patch Vendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements Broken Link
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html Mailing List Third 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/
https://security.gentoo.org/glsa/202105-25 Third Party Advisory
https://usn.ubuntu.com/usn/usn-4933-1 Third Party Advisory
https://community.openvpn.net/openvpn/wiki/CVE-2020-15078 Patch Vendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements Broken Link
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html Mailing List Third 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/
https://security.gentoo.org/glsa/202105-25 Third Party Advisory
https://usn.ubuntu.com/usn/usn-4933-1 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Shell

Updated: 2 years, 8 months ago
0 stars 0 fork 0 watcher
Born at : April 7, 2022, 5:22 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-15078 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-15078 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://community.openvpn.net/openvpn/wiki/CVE-2020-15078
    Added Reference https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
    Added Reference https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/
    Added Reference https://security.gentoo.org/glsa/202105-25
    Added Reference https://usn.ubuntu.com/usn/usn-4933-1
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/ [No types assigned]
    Added Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/ [No types assigned]
    Added Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/ [No types assigned]
    Removed Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/
    Removed Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/
    Removed Reference OpenVPN Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/
  • Reanalysis by [email protected]

    Aug. 05, 2022

    Action Type Old Value New Value
    Removed CWE NIST CWE-287
    Added CWE NIST CWE-306
  • Modified Analysis by [email protected]

    May. 12, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    May. 03, 2022

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Dec. 10, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/ Mailing List, Third Party Advisory
    Changed Reference Type https://usn.ubuntu.com/usn/usn-4933-1 No Types Assigned https://usn.ubuntu.com/usn/usn-4933-1 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 30, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/ [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/ [No Types Assigned]
    Added Reference https://usn.ubuntu.com/usn/usn-4933-1 [No Types Assigned]
  • Modified Analysis by [email protected]

    Jun. 02, 2021

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202105-25 No Types Assigned https://security.gentoo.org/glsa/202105-25 Third Party Advisory
  • CVE Modified by [email protected]

    May. 26, 2021

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202105-25 [No Types Assigned]
  • Initial Analysis by [email protected]

    May. 19, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://community.openvpn.net/openvpn/wiki/CVE-2020-15078 No Types Assigned https://community.openvpn.net/openvpn/wiki/CVE-2020-15078 Patch, Vendor Advisory
    Changed Reference Type https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements No Types Assigned https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements Broken Link
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration OR *cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.11 *cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* versions from (including) 2.5.0 up to (excluding) 2.5.2
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 29, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-15078 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.29 }} -2.60%

score

0.68575

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability