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null RCE Exploit Released for Unpatched Chrome, Opera, and Brave Browsers

An Indian security researcher has publicly published a proof-of-concept (PoC) exploit code for a newly discovered flaw impacting Google Chrome and other Chromium-based browsers like Microsoft Edge, Opera, and Brave.


The working exploit concerns a remote code execution vulnerability in the V8 JavaScript rendering engine that powers the web browsers. 

According to the screenshot , the PoC HTML file, and its associated JavaScript file, can be loaded in a Chromium-based browser to exploit the security flaw and launch the Windows calculator (calc.exe) app. But it's worth noting that the exploit needs to be chained with another flaw that can allow it to escape Chrome's sandbox protections.


It appears that  was able to put together the PoC by reverse-engineering the patch that Google's Chromium team pushed to the open-source component after details of the flaw were shared with the company.

 

"Getting popped with our own bugs wasn't on my bingo card for 2021" . "Not sure it was too smart of Google to add that regression test right away."

While Google has addressed the issue in the latest version of V8, it's yet to make its way to the stable channel, thereby leaving the browsers vulnerable to attacks. Google is expected to ship Chrome 90 later today, but it's not clear if the release will include a patch for the V8 flaw.