There have been multiple articles describing a “botnet” of 1000’s of compromised smartphones, which all make calls to a 911 Public Safety Answering Point (PSAP) or some other target. A smartphone-based attack is the primary way to generate a TDoS attack against a PSAP
I don't know how widely "The Cyber Shield" is distributed. I believe we get it because some of our folks have security clearances (so if true, lots of people get it). Anyway, there is some info about our recent article in Government Computer News (GCN). I copied the info and provided a link to the bulletin below
See the article below about a young hacker who "accidentally" or so he says, generated a Telephony Denial of Service (TDoS) attack against 911 facilities in the Phoenix area
Check out the following articles on Telephony Denial of Service (TDoS) and how it could affect 911 systems.
There have been a number of additional bulletins warning of Telephony Denial of Service (TDoS) attacks on 911 centers. Below is a summary of the bulletins I am aware of.
There has been a ton of press lately about Telephony Denial of Service (TDoS). There are real attacks occuring against 911 centers and financial contact centers.
The Comunications Fraud Control Association (CFCA) publised a link to a bulletin from the Department of Homeland Security (DHS) NCCIC.
Brian Krebs, a well know security expert, experienced a SWATing attack.