What is CVE-2021-4234?

CVE-2021-4234 is a high-severity vulnerability in Openvpn Openvpn_access_server, classified under CWE-406. CVSS score: 7.5/10. Published 2022-07-06.

How severe is CVE-2021-4234?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Openvpn Openvpn_access_server

CVE-2021-4234

OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.

EPSS: 0.008 (53.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openvpn Openvpn_access_server
N/a Openvpn Access Server — versions 2.10 and prior version

Weakness classification (CWE)

CWE-406

References

security@openvpn.net (x_refsource_MISC, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-4234?: CVE-2021-4234 is a high-severity vulnerability in Openvpn Openvpn_access_server, classified under CWE-406. CVSS score: 7.5/10. Published 2022-07-06.
How severe is CVE-2021-4234?: High severity. CVSS v3 base score is 7.5 out of 10.