Vulnerability Details : 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.
Products affected by CVE-2021-4234
- cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4234
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 38 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4234
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-4234
-
The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor.Assigned by: security@openvpn.net (Secondary)
References for CVE-2021-4234
-
https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0
Access Server Release Notes | OpenVPNRelease Notes;Vendor Advisory
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