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openvpn -- denial of service: malicious authenticated "tap" client can deplete server virtual memory

Description:

James Yonan reports:

A malicious [authenticated] client in "dev tap" ethernet bridging mode could theoretically flood the server with packets appearing to come from hundreds of thousands of different MAC addresses, causing the OpenVPN process to deplete system virtual memory as it expands its internal routing table.

References:

Affects:

portaudit: openvpn -- denial of service: malicious authenticated "tap" client can deplete server virtual memory

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.


Oliver Eikemeier <eik@FreeBSD.org>