SMS text messages were already the weakest link securing just about anything online, mainly because there are tens of thousands of employees at mobile stores who can be tricked or bribed into swapping control over a mobile phone number to someone else. Now we’re learning about an entire ecosystem of companies that anyone could use to silently intercept text messages intended for other mobile users.
Security researcher “Lucky225” worked with Vice.com’s Joseph Cox to intercept Cox’s incoming text messages with his permission. Lucky225 showed how anyone could do the same after creating an account at a service called Sakari, a company that helps celebrities and businesses do SMS marketing and mass messaging.
The “how they did it” was sickeningly simple. It cost just $16, and there was precious little to prevent someone from stealing your text messages without your knowledge. Cox writes:
Sakari offers a free trial to anyone wishing to see what the company’s dashboard looks like. The cheapest plan, which allows customers to add a phone number they want to send and receive texts as, is where the $16 goes. Lucky225 provided Motherboard with screenshots of Sakari’s interface, which show a red “+” symbol where users can add a number.
While adding a number, Sakari provides the Letter of Authorization for the user to sign. Sakari’s LOA says that the user should not conduct any unlawful, harassing, or inappropriate behavior with the text messaging service and phone number.
But as Lucky225 showed ..
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