Vulnerabilities (CVE)

Filtered by vendor Openvpn Subscribe
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2023-46850 3 Debian, Fedoraproject, Openvpn 4 Debian Linux, Fedora, Openvpn and 1 more 2023-11-29 N/A 9.8 CRITICAL
Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.
CVE-2017-12166 2 Debian, Openvpn 2 Debian Linux, Openvpn 2022-05-12 6.8 MEDIUM 9.8 CRITICAL
OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution.
CVE-2022-0547 2 Fedoraproject, Openvpn 2 Fedora, Openvpn 2022-05-03 7.5 HIGH 9.8 CRITICAL
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
CVE-2020-8953 1 Openvpn 1 Openvpn Access Server 2020-02-18 7.5 HIGH 9.8 CRITICAL
OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a user is enrolled in two-factor authentication).
CVE-2018-7544 1 Openvpn 1 Openvpn 2018-04-10 6.4 MEDIUM 9.1 CRITICAL
** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning.