CVE-2021-4234
Last modified
CVE-2021-4234 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 estimates a 0.76% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn Access Server | < 2.11.0 |
References
- https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0Release Notes, Vendor Advisory
- https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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