Google Project Zero Wifi

Inspecting the dma engine. Posted by gal beniamini project zero. If a form of isolation is present the memory ranges used by the wi fi soc to perform dma operations and those utilised by the host would be disparate.

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For mobile devices this statement rings even truer.

Google project zero wifi. To gain some visibility into the isolation capabilities present on the iphone 7 we ll begin by exploring the wi fi firmware itself. Most iphone and android phones run on a broadcom wi fi system on a chip soc. Google s project zero has just uncovered how easy it is for attackers to target your phone s wi fi chip which is essentially a mini processor for wi fi that detects and processes networks. Google s project zero has been on a roll lately unveiling sophisticated bugs in cloudflare lastpass and now broadcom a wi fi chip supplier whose product is found in iphones nexuses and samsung.

It s a well understood fact that platform security is an integral part of the security of complex systems. As we ve seen in the previous round of research the wi fi firmware consists of a small chunk of rom containing most of the firmware s data and code and a larger blob of ram housing all of the runtime data structures such as the heap and stack as well as patches to the rom s code. Modern mobile platforms include multiple processing units all elaborately communicating with one another. Bloomua 123rf google s project zero continues to strap on its cape to make the world a safer place for us to use our electronics this time helping to discover a dangerous flaw in broadcom wi fi.