Microsoft Adds Option To Disable JScript In Internet Explorer

[Prometheus]

As part of the October 2020 Patch Tuesday security updates, Microsoft has added a new option to Windows to let system administrators disable the JScript component inside Internet Explorer. ZDNet reports:

The JScript scripting engine is an old component that was initially included with Internet Explorer 3.0 in 1996 and was Microsoft’s own dialect of the ECMAScript standard (the JavaScript language). Development on the JScript engine ended, and the component was deprecated with the release of Internet Explorer 8.0 in 2009, but the engine remained in all Windows OS versions as a legacy component inside IE. Across the years, threat actors realized they could attack the JScript engine, as Microsoft wasn’t actively developing it and only rarely shipped security updates, usually only when attacked by threat actors. […]

Now, 11 years after deprecating the component, Microsoft is finally giving system administrators a way to disable JScript execution by default. According to Microsoft, the October 2020 Patch Tuesday introduces new registry keys that system administrators can apply and block the jscript.dll file from executing code. Details on how this can be done are available below, as taken from Microsoft’s documentation.