CVE-2021-4234 — Insufficient Control of Network Message Volume (Network Amplification) in Access Server
CWE-406 — Insufficient Control of Network Message Volume (Network Amplification)2 documents2 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 40.00%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 6
Latest updateJul 7
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6