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TechStartup Info • View topic - Hackers only need your phone number to eavesdrop on calls, r

Hackers only need your phone number to eavesdrop on calls, r

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Hackers only need your phone number to eavesdrop on calls, r

Postby goon2019 » Sat Jul 20, 2019 5:39 am

Hackers only need your phone number to eavesdrop on calls, read texts, track you



You might know that if a hacker has nothing more than your phone number, then he or she can listen into and record your calls, read your texts, or track your location, but does your grandma know it? That’s what I liked about a 60 Minutes phone hacking segment; it can reach non-security minded audiences who may have thought such a hack could only happen in movies.
If you use a mobile phone, then you use Signaling System Seven, or SS7; “Every person with a cellphone needs SS7 to call or text each other,” 60 Minutes explained. “The SS7 network is the heart of the worldwide mobile phone system. Phone companies use SS7 to exchange billing information. Billions of calls and text messages travel through its arteries daily. It is also the network that allows phones to roam.”

Security researchers have been warning about SS7 protocol flaws for years. Granted, most people would not be targeted by this type of attack. Then again, some companies sell “the ability to track your phone number wherever you go with a precision of up to 50 meters” as researcher Tobias Engel pointed out during the 2014 Chaos Communication Congress presentation “SS7: Locate. Track. Manipulate.” Karsten Nohl of SRLabs also presented that year before releasing “SnoopSnitch.” You may remember other times when Nohl revealed vulnerabilities which affected millions of phones.
Some people believe the SS7 flaw has never been fixed “because the location tracking and call bugging capacity has been widely exploited by intelligence services for espionage.” Yet if intelligence agencies don’t want the flaw fixed because they can abuse it for spying, to glean valuable intel from targets, then Congressman Ted Lieu said those people should absolutely “be fired.”

Congressman Lieu agreed to use an iPhone supplied by 60 Minutes even though he knew it would be hacked. He’s no technical illiterate either; he has a computer science degree from Stanford and serves on the House Oversight and Reform Subcommittee on Information Technology. The congressman didn’t have to fall for social engineering or accept a text with an attachment; all Nohl and his team needed was the phone number of the iPhone Lieu was using.
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