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.
Published 2020-07-14 18:15:15
Updated 2021-11-23 22:25:51
Source OpenVPN Inc.
View at NVD,   CVE.org

Products affected by CVE-2020-15074

Exploit prediction scoring system (EPSS) score for CVE-2020-15074

0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15074

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N
10.0
2.9
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.9
3.6
NIST

CWE ids for CVE-2020-15074

  • The authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker.
    Assigned by: security@openvpn.net (Secondary)
  • According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-15074

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