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Apple’s iOS pasteboard leaks location data to spy apps – Naked Security


To most iOS users, pasteboard is simply part of the way to copy and paste data from one place to another.

You take a picture, fancy sharing it with friends, and your phone uses the pasteboard to move the image to the desired app.

Now an app developer called Mysk has discovered pasteboard’s dark side – malicious apps could exploit it to work out a user’s location even when that user has locked down app location sharing.

The weakness here is caused by the fact that, unless GPS permissions were refused, images taken with the embedded camera app on iPhones and iPads are saved with embedded GPS metadata recording where each was taken.

In the simplest scenario, an iPhone user would take a photo, copy it between apps using the pasteboard, from which a malicious app could extract location metadata while comparing it with timestamps to determine whether it was current or taken in the past.

Images taken from third-party web sources could be filtered out by comparing aspects of an image’s metadata with the device’s hardware and software properties to detect differences.

Although a malicious app should only be able to access pasteboard data while active, Mysk’s bypass was to write a demo app, KlipboardSpy, paired to a foreground widget visible in Today View, to prove the hack worked under real-world conditions. Moreover:

As the pasteboard is designed to store all types of data, the exploit is not only restricted to leaking location information. By gathering all these types of content, a malicious app can covertly build a rich profile for each user, and what it can do with this content is limitless.

That’s not only location data, then, but potentially anything the user has copied into pasteboard, including passwords and bank details.

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