Locked iPhones Rendered Almost Useless in Australia's COVIDSafe Tracking Efforts

upstart writes in with an IRC submission:

Locked iPhones rendered almost useless in Australia's COVIDSafe tracking efforts:

Software engineer Richard Nelson, who was part of a team of researchers that found other bugs in COVIDSafe, has detailed a bug affecting iPhone users, rendering their device basically useless when it comes to tracking efforts.

A locked iPhone with an expired ID cannot generate a new ID. Without an ID, Nelson said the device will record other devices around it, but cannot be recorded by others.

"A device in this state will record other people around it, but will not be recorded by others. If all relevant devices are in this state, no encounters are logged," he wrote.

"One could imagine Alice packing her bag, putting her iPhone in and going out for the day to a football game. With her device in this state, nobody else will record her presence, and if anyone around her tested positive she would not be contacted."

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