[VoiceOps] Billing of Forwarded Calls
lriemer at bestline.net
Wed Nov 11 17:20:58 EST 2009
I agree. Shouldn't be too hard if you're sniffing the line, say on a
wi-fi connection. Listen for INVITEs, pull dialog info, spoof CANCELs.
Nice little DOS attack.
Alex Balashov wrote:
> Lee Riemer wrote:
>> What's wrong with authenticating BYEs and CANCELs? I see them as
>> just as important as an INVITE. Anyone can some around, sniff the
>> dialog and spoof a BYE or CANCEL.
> They'd have to spoof a Call-ID, From and To tags, correct CSeqs, any
> loose-routing parameters present in the Route and/or Record-Route
> headers, and the Route header itself.
> I suppose it *could* be done... but...
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