CVE-2020-15074: openvpn openvpn_access_server
CVSS: 7.5v3.1HighModified
Published 14-07-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-15074 is a high (CVSS 7.5) vulnerability in openvpn openvpn_access_server. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.6% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.04%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 14-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.04%
Chance of exploitation in the next 30 days
Percentile
64%
Versus all other CVEs
30-day change
0.00 pp
From 1.04% on 20-09-2026
20-09-202620-10-2026
EPSS score1.04%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-302Authentication Bypass by Assumed-Immutable DataThe authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker.
- CWE-613Insufficient Session ExpirationAccording to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
Affected systems
Openvpn1 product
- openvpn_access_server< 2.8.4 | ≥ 2.9.0, < 2.9.6
1 vendor · 1 product