Description
This module exploits an issue in Google Chrome 80.0.3987.87 (64 bit). The exploit corrupts the length of a float array (float_rel), which can then be used for out of bounds read and write on adjacent memory. The relative read and write is then used to modify a UInt64Array (uint64_aarw) which is used for read and writing from absolute memory. 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, so the browser must be run with the --no-sandbox option for the payload to work correctly.
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/multi/browser/chrome_jscreate_sideeffectmsf undefined(chrome_jscreate_sideeffect) > show actions ...actions...msf undefined(chrome_jscreate_sideeffect) > set ACTION < action-name >msf undefined(chrome_jscreate_sideeffect) > show options ...show and set options...msf undefined(chrome_jscreate_sideeffect) > runPrioritise with Active Threat Intelligence
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