IGMP Version 3 Denial of Service Question

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Sep 27th, 2010
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I was wondering if there is a place I could get some more information on the fix for Cisco IOS outlined here:

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I'm interested in finding out what exactly the software upgrade Cisco entails for fixing this vulnerability.  All they really outline is that there's a problem and here's the answer.  No explanation on how it prevents corrupted IGMP packets from causing the denial of service.


Any information or links would be greatly appreciated,


Chris

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