OpenVPN released an update to respond to the OpenSSL vulnerability described in CVE-2009-3555. OpenVPN has identified a vulnerability caused by an error in OpenSSL which could be exploited by attackers to manipulate certain data and information.

OpenVPN recommend upgrading to version 2.1_rc21 which is available here.

Additional information regarding OpenVPN session renegotiation is available here.

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Guy Bruneau IPSS Inc. gbruneau at isc dot sans dot org