SIP home gateways under fire

Source routing attacks applied to SIP

Wolfgang Beck

Playlists: '27c3' videos starting here / audio / related events

The SIP home gateway -- which combines a NAT router, a SIP proxy, and analogue phone adapters -- is the weakest link in a Voice over IP network. SIP's numerous source routing mechanisms share the well-known security weaknesses of IP source routing. The talk discusses possible exploits and countermeasures.

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