OpenVPN Denial of Service Vulnerability

OpenVPN Denial of Service Vulnerability

CVE-2005-2531 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts.

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