PT-2022-11589 · Openvpn · Openvpn Access Server

Published 2022-07-06 · Updated 2022-07-14 · CVE-2021-4234

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions OpenVPN Access Server versions 2.10 and prior

Description The issue allows for a limited amplification attack by resending multiple packets in response to a reset packet sent from the client, which the client does not respond to.

Recommendations For OpenVPN Access Server versions 2.10 and prior, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-406

Related Identifiers

CVE-2021-4234

Affected Products

Openvpn Access Server

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-4234 · Security Note
• https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-4234 · Vendor Advisory
• https://t.me/cibsecurity/45706 · Telegram Post
• https://t.me/cvenotify/32707 · Telegram Post