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Re: Is my router owned? How would I know?
From: Mikael Abrahamsson <swmike () swm pp se>
Date: Thu, 12 Jan 2006 23:09:53 +0100 (CET)

On Thu, 12 Jan 2006, Rob Thomas wrote:

If there are new or changed SNMP RW community strings, look out!

If you have any SNMP v1/v2 RW communities what so ever, you're likely to be owned, at least if they're common to several units in your network and you don't limit what part of the tree the RW communities can access.

Seems like a common attack vector is to send SNMP WRITE and upload the router configuration to a hacked tftp server, and then iterate thru the network as a lot of people have a single SNMP WRITE community in their network.

Mikael Abrahamsson    email: swmike () swm pp se

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