Hackers Using Fake Police Data Requests against Tech Companies
Schneier on Security
2022 04 05
Brian Krebs has a detailed post about hackers using fake police data requests to trick companies into handing over data.
Virtually all major technology companies serving large numbers of users online have departments that routinely review and process such requests, which are typically granted as long as the proper documents are provided and the request appears to come from an email address connected to an actual police department domain name.
But in certain circumstances – such as a case involving imminent harm or death – an investigating authority may make what’s known as an Emergency Data Request (EDR), which largely bypasses any official review and does not require the requestor to supply any court-approved documents.
It is now clear that some hackers have figured out there is no quick and easy way for a company that receives one of these EDRs to know whether it is legitimate. Using their illicit access to police email systems, the hackers will send a fake EDR along with an attestation that innocent people will likely suffer greatly or die unless the requested data is provided immediately.
In this scenario, the receiving company finds itself caught between two unsavory outcomes: Failing to immediately comply with an EDR -- and potentially having someone’s blood on their hands -- or possibly leaking a customer record to the wrong person.
We allude to this kind of risk in our 2015 “Keys Under Doormats” paper:
Third, exceptional access would create concentrated targets that could attract bad actors. Security credentials that unlock the data would have to be retained by the platform provider, law enforcement agencies, or some other trusted third party. If law enforcement’s keys guaranteed access to everything, an attacker who gained access to these keys would enjoy the same privilege. Moreover, law enforcement’s stated need for rapid access to data would make it impractical to store keys offline or split keys among multiple keyholders, as security engineers would normally do with extremely high-value credentials.
The “credentials” are even more insecure than we could have imagined: access to an email address. And the data, of course, isn’t very secure. But imagine how this kind of thing could be abused with a law enforcement encryption backdoor.