Vulnerability Report

CVE-2021-4234

Title: Openvpn Openvpn Access Server

Other

Proof Of Concept

No public PoC currently indexed for CVE-2021-4234.

CWE Category CWE-406

Published Date Jul 06, 2022

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

0.85%

Vulnerability Summary

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.

Impacted Vendors

openvpn 1

Reference Links

https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0 https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-4234 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

July 06, 2022 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.