[…] If an attacker inserts their own SIM into a target’s Android, then enters the wrong SIM PIN three times, they can enter their SIM’s PUK to be able to create a new SIM PIN. Once they do, they bypass the lock screen entirely and access the phone. You can watch the hypothetical attack play out in the video below:
Schütz brought this flaw to Google’s attention back in June of this year, but it took the company five months to finally push a patch.[…]
Source: Fix the Android Security Flaw That Lets Anyone Unlock Your Phone

Robin Edgar
Organisational Structures | Technology and Science | Military, IT and Lifestyle consultancy | Social, Broadcast & Cross Media | Flying aircraft
robin@edgarbv.com
https://www.edgarbv.com