Vulnerability · Published Jul 6, 2022 · Assigned by OpenVPN
CVE-2021-4234
High 7.5
In plain English
A high-severity security flaw in OpenVPN Access Server. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)0.9%top 39.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | OpenVPN Access Server | 2.10 and prior version |
Weakness: CWE-406