HomeWinBuzzer NewsMicrosoft Edge and Mozilla Firefox Have Been Exploited at Pwn2Own

Microsoft Edge and Mozilla Firefox Have Been Exploited at Pwn2Own

Researchers at the Pwn2Own hacking contest successfully exploited Microsoft Edge and Mozilla Firefox more than once.


Day 2 of the Pwn2Own hacking contest saw Edge and being exploited. Microsoft's Windows 10 browser was evaded when researchers developed a complex method for escaping a virtual machine.

Starting with Mozilla Firefox, Richard Zhu and Amat Cama from Fluoroacetate tried to exploit Firefox with a JIT Bug paired with an out-of-bounds write in Windows kernel. By leveraging this method, the researchers were able to run code at a system level.

This means they essentially took over the PC by directing Firefox to a website with crafted malicious content. For breaking into Firefox, the pair were handed a prize of $50,000.

Cama and Zhu were not the only researchers who defeated Firefox. Niklas Baumstark also used a JIT Bug combined with a logic bug to escape the browser's sandbox. By doing so, he was able to work and achieve log-in rights and gain full system access.

For his efforts, Baumstark was given a $40,000 for his research.

Beating Microsoft Edge

Zhu and Cama also set to work on . The team created a very complex way to exploit the browser to win $130,000.

“Starting from within a VMWare Workstation client, they opened Microsoft Edge and browsed to their specially crafted web page,” Zero Day Initiative says.

“That's all it took to go from a browser in a virtual machine client to executing code on the underlying hypervisor. They started with a type confusion bug in the Microsoft Edge browser, then used a race condition in the Windows kernel followed by an out-of-bounds write in VMware workstation.”

Microsoft Edge was also exploited by Arthur Gerkis of Exodus Intelligence. He used a double-free bug to escape the browser's sandbox. For his efforts he claimed $50,000.

Luke Jones
Luke Jones
Luke has been writing about all things tech for more than five years. He is following Microsoft closely to bring you the latest news about Windows, Office, Azure, Skype, HoloLens and all the rest of their products.

Recent News