Internet Explorer Zero-day fix breaks printing

Teodor Nechita
by Teodor Nechita
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Internet Explorer

Microsoft started the year 2020 by pulling the plug on Windows 7, and by naming the Chromium-based Microsoft Edge as the default browser.

However, not everyone was willing to give up Internet Explorer just yet. Thus, Microsoft still provides Internet Explorer with updates.

The only problem with them is that they bring an entire host of new issues as well.

Internet Explorer fix affects JScript.dll-based processes

Users have been reporting on forums that the latest Zero-day fix has broken printer functionality, especially on HP devices.

Heads up to those who deployed Microsoft’s most recent exploit temporary fix. It seems the jscript.dll is needed for some HP drivers. In our environment we saw I/O errors on pretty much all HP printers after deploying the “patch”. Reverting the patch immediately fixed printing.

The initial purpose of this patch was to fix an exploit. Without it hackers could take advantage of a security weakness in Internet Explorer’s scripting.

Admittedly, Microsoft stated that this fix is more of a workaround, and it simply involved restricting access to JScript.dll. However, this fix seems to have caused other issues as well.

Implementing these steps might result in reduced functionality for components or features that rely on jscript.dll. For example, depending on the environment, this could include client configurations that leverage proxy automatic configuration scripts (PAC scripts).

Fortunately enough, uninstalling the fix will revert the change and restore printer functionality back to normal.

What do you think about this latest issue? Share your thoughts in the comments section below and we’ll continue to provide you with more news on the matter.