MB 3.0.6 Exploit Protection - Opening 400k MSWord file with embedded equations takes 50seconds, eats CPU

[Siro]

It took me an insanely long time (around 50 sec) to open what should be small word files.

I took a measurement using WPR and it appears MBAE engine is the culprit.
Admittedly the file has a lot of embedded objects (equation objects) but this is insane.

When I disabled MB Anti-Exploit in the settings, loading the file took 3-5 seconds.

See how 90% of the time of the thread is spent inside mbae64.dll, and that it takes 25% CPU (ie, an entire CPU thread)

 

Edited January 31, 2017 by Siro

[Siro]

update info: logs,
Windows version: Microsoft Windows [Version 10.0.14393]
Word Version: 16.0.7369.2102
Mathtype 6.9 installed

Offending docx file will be supplied on request by pm

logs.zip

[AdvancedSetup]

Thank you @Siro

I've asked some others in Tech Support to take a look at this and give feedback.

[Rsullinger]

Hello Siro,

 

I will be assisting with this issue to see about getting it fixed. I am going to send you a PM to test the offending docx on our side along with instructions to capture more data on the PC itself (other installed programs). Expect that PM in the next couple of minutes!