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HIGH · 7.5

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 i...

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
OpenvpnOpenvpn Access Server< 2.11.0

Related Weaknesses (CWE)

CWE-406

References

FAQ

What is CVE-2021-4234?

CVE-2021-4234 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 i...

How severe is CVE-2021-4234?

CVE-2021-4234 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-4234?

Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn Access Server.