This exploit takes advantage of a use after free vulnerability in Google Chrome 72.0.3626.119 running on Windows 7 x86. The FileReader.readAsArrayBuffer function can return multiple references to the same ArrayBuffer object, which can be freed and overwritten with sprayed objects. The dangling ArrayBuffer reference can be used to access the sprayed objects, allowing arbitrary memory access from Javascript. This is used to write and execute shellcode in a WebAssembly object. The shellcode is executed within the Chrome sandbox, so you must explicitly disable the sandbox for the payload to be successful.
1845174659a656cb293c5dd2f17fe75cGentoo Linux Security Advisory 201903-23 - Multiple vulnerabilities have been found in Chromium, the worst of which could result in the remote execution of code. Versions less than 73.0.3683.75 are affected.
907460bdcf468c12ba4df32e8a1dfe34Debian Linux Security Advisory 4404-1 - Clement Lecigne discovered a use-after-free issue in chromium's file reader implementation. A maliciously crafted file could be used to remotely execute arbitrary code because of this problem.
f259f323229f50aeb91583a49ffac28bRed Hat Security Advisory 2019-0481-01 - Chromium is an open-source web browser, powered by WebKit. This update upgrades Chromium to version 72.0.3626.121. Issues addressed include a use-after-free vulnerability.
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