Posted by Mateusz Jurczyk, Google Project Zero When tackling a new vulnerability research target, especially a closed-source one, I prioritize gathering as much information about it as possible. This gets especially interesting when it’s a subsystem as old and fundamental ...
Posted by Sergei Glazunov and Mark Brand, Google Project Zero IntroductionAt Project Zero, we constantly seek to expand the scope and effectiveness of our vulnerability research. Though much of our work still relies on traditional methods like manual source code ...
Posted by Seth Jenkins, Google Project Zero Introduction Android’s open-source ecosystem has led to an incredible diversity of manufacturers and vendors developing software that runs on a broad variety of hardware. This hardware requires supporting drivers, meaning that many different ...
Posted by Mateusz Jurczyk, Google Project Zero Before diving into the low-level security aspects of the registry, it is important to understand its role in the operating system and a bit of history behind it. In essence, the registry is ...
Posted by Mateusz Jurczyk, Google Project Zero In the 20-month period between May 2022 and December 2023, I thoroughly audited the Windows Registry in search of local privilege escalation bugs. It all started unexpectedly: I was in the process of ...
By Mark Brand, Google Project Zero Introduction It’s finally time for me to fulfill a long-standing promise. Since I first heard about ARM’s Memory Tagging Extensions, I’ve said (to far too many people at this point to be able to back ...
By Ian Beer A graph representation of the sandbox escape NSExpression payload In April this year Google’s Threat Analysis Group, in collaboration with Amnesty International, discovered an in-the-wild iPhone zero-day exploit chain being used in targeted attacks delivered via malicious ...
By Seth Jenkins, Project Zero Introduction In December 2022, Google’s Threat Analysis Group (TAG) discovered an in-the-wild exploit chain targeting Samsung Android devices. TAG’s blog post covers the targeting and the actor behind the campaign. This is a technical analysis ...
By Mark Brand, Project Zero Background In 2018, in the v8.5a version of the ARM architecture, ARM proposed a hardware implementation of tagged memory, referred to as MTE (Memory Tagging Extensions). Through mid-2022 and early 2023, Project Zero had access to ...
By Mark Brand, Project Zero Background In 2018, in the v8.5a version of the ARM architecture, ARM proposed a hardware implementation of tagged memory, referred to as MTE (Memory Tagging Extensions). In Part 1 we discussed testing the technical (and implementation) limitations ...