This Metasploit module exploits an issue in Google Chrome versions before 87.0.4280.88 (64 bit). The exploit makes use of an integer overflow in the SimplifiedLowering phase in turbofan. It is used along with a typer hardening bypass using ArrayPrototypeShift to create a JSArray with a length of -1. This is abused to gain arbitrary read/write into the isolate region. Then an ArrayBuffer can be used to achieve absolute arbitrary read/write. The exploit then uses WebAssembly in order to allocate a region of RWX memory, which is then replaced with the payload shellcode. The payload is executed within the sandboxed renderer process, the browser must be run with the --no-sandbox option for the payload to work correctly.
a2c2e0bb6afa9428a1723f49c6bd0ba43ef8b68bb81b7b27053a5cae99795839Insufficient data validation in V8 in Google Chrome versions prior to 87.0.4280.88 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
fdb909de2de5f3f2a4de99d31ea1db5b05b9e57c4f4895104dd5197dbcab1f7fGentoo Linux Security Advisory 202012-5 - Multiple vulnerabilities have been found in Chromium and Google Chrome, the worst of which could result in the arbitrary execution of code. Versions less than 87.0.4280.88 are affected.
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