Vulnerability · Published Jul 12, 2021 · Assigned by OpenVPN
CVE-2021-3547
High 7.4
In plain English
A high-severity security flaw in OpenVPN 3 Core Library. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).
Severity (CVSS NVD)7.4High
Exploit odds (30 days)1.2%top 30.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | OpenVPN 3 Core Library | 3.6 and 3.6.1 |
Weakness: CWE-305
References
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements x_refsource_MISC
- https://community.openvpn.net/openvpn/wiki/CVE-2021-3547 x_refsource_MISC