Openvpn Access Server

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.

Published: 2023-11-11T00:15:07.076Z
Updated: 2025-12-16T18:23:24.266Z

Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.

Published: 2023-11-11T00:05:13.487Z
Updated: 2025-06-11T14:30:02.796Z

OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal

Published: 2022-07-06T15:10:33.000Z
Updated: 2024-08-03T08:09:22.611Z

The OpenVPN Access Server installer creates a log file readable for everyone, which from version 2.10.0 and before 2.11.0 may contain a random generated admin password

Published: 2022-07-06T15:09:08.000Z
Updated: 2024-08-03T08:09:22.660Z

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.

Published: 2022-07-06T19:10:17.000Z
Updated: 2024-08-03T17:23:09.056Z

OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script or HTML via the web login page URL.

Published: 2021-09-23T14:53:51.000Z
Updated: 2024-08-03T17:09:09.578Z

OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a user is enrolled in two-factor authentication).

Published: 2020-02-13T03:13:02.000Z
Updated: 2024-08-04T10:12:11.007Z

OpenVPN Access Server 2.7.3 to 2.8.7 allows remote attackers to trigger an assert during the user authentication phase via incorrect authentication token data in an early phase of the user authentication resulting in a denial of service.

Published: 2021-06-04T10:47:15.000Z
Updated: 2024-08-04T17:23:10.453Z

OpenVPN Access Server 2.8.7 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.

Published: 2021-06-04T10:42:01.000Z
Updated: 2024-08-04T13:08:21.878Z

OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.

Published: 2020-07-14T17:27:31.000Z
Updated: 2024-08-04T13:08:21.889Z

An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3. With the full featured RPC2 interface enabled, it is possible to achieve a temporary DoS state of the management interface when sending an XML Entity Expansion (XEE) payload to the XMLRPC based RPC2 interface. The duration of the DoS state depends on available memory and CPU speed. The default restricted mode of the RPC2 interface is NOT vulnerable.

Published: 2020-05-04T13:45:41.000Z
Updated: 2024-08-04T11:28:14.015Z

Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2) connect to arbitrary VPN servers, or (3) create VPN profiles and execute arbitrary commands via crafted API requests.

Published: 2014-11-26T15:00:00.000Z
Updated: 2024-08-06T13:33:13.636Z

Cross-site request forgery (CSRF) vulnerability in the Admin web interface in OpenVPN Access Server before 1.8.5 allows remote attackers to hijack the authentication of administrators for requests that create administrative users.

Published: 2014-05-13T14:00:00.000Z
Updated: 2024-08-06T15:44:33.137Z