CVE-2020-15074
OpenVPN Access Server Authentication Token Exhaustion
Description
OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.
INFO
Published Date :
July 14, 2020, 6:15 p.m.
Last Modified :
Nov. 23, 2021, 10:25 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
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-2020-15074.
| URL | Resource |
|---|---|
| https://openvpn.net/vpn-server-resources/release-notes/ | Release Notes Vendor 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-15074 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-15074 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 [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Nov. 23, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.8.4 OR *cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.8.4 *cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:* versions from (including) 2.9.0 up to (excluding) 2.9.6 -
CVE Modified by [email protected]
Nov. 22, 2021
Action Type Old Value New Value Changed Description OpenVPN Access Server older than version 2.8.4 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp. OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp. -
Initial Analysis by [email protected]
Jul. 16, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://openvpn.net/vpn-server-resources/release-notes/ No Types Assigned https://openvpn.net/vpn-server-resources/release-notes/ Release Notes, Vendor Advisory Added CWE NIST CWE-613 Added CPE Configuration OR *cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.8.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-15074 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-15074
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.01%
score
0.34048
percentile