Security Threats and Requirements for Emergency Call Marking and Mapping
Note: This ballot was opened for revision 05 and is now closed.
(Jon Peterson) Yes
(Jari Arkko) No Objection
Comment (2007-06-21 for -)
This document identifies and describes threats that affect emergency call mechanisms. As the Requirements document, this document is already in good shape. However, there is one attack objective that I think is very important, and that should be attended to a bit closer IMO: > o to divert emergency responders to non-emergency sites. This memo > has not identified any attacks within its intended scope that > achieve this objective, so it will not be mentioned further. Diverting emergency responders to non-emergency sites is actually not an objective that an attacker might have, but rather a technique of reaching the objective described in the first bullet ("to deny system services to all users in a given area"). So the draft actually does address this objective. Still, I think the /possibility/ for an attacker to divert emergency responders to non-emergency sites -- as a means of reaching the DoS objective -- is important enough to get a bit further elaborated on, in particular with respect to its relationship to the mechanism to be developed by the Ecrit WG. I think that some clarification would be useful along these lines: Preventing diversion of emergency calls would likely require some evidence about the existence of a reported emergency case, such as a photograph, a video clip, or N previous calls reporting the same emergency case. The decision of which proof would be acceptable, and whether requiring such proof is something desirable in the first place, is likely something that cannot be decided in the Ecrit WG. Preventing diversion of emergency calls is hence something that is likely not to be in scope of the Ecrit WG. Maybe this should be clarified either in this document, or in the Requirements document -- in particular because the Requirements document currently only talks about verifying the caller's location, rather than verifying whether there actually exists an emergency case at that location.