Author Topic: [Bug] Office and mutex  (Read 1310 times)

fixer

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[Bug] Office and mutex
« on: May 24, 2017, 05:39:11 pm »
If you have Office running non-isolated, starting it in isolation will result in crash. The culprit here is mutex, who could have thought. Office tries to create (or open) mutex named 5CAC3FAB-87F0-4750-984D-D50144543427Office-VERXX (where VERXX depends on version like VER15 or VER16) with MUTEX_ALL_ACCESS access right. If this mutes was already created by non-isolated instance, isolated Office will fail to open it... you guessed it right, because of isolation and blocked access. Failure to open mutex will result in crash. So much for the mutex. When it was discovered, it was still unpatched. Haven't checked since then. So beware, even mutexes can crash programs.
« Last Edit: April 13, 2019, 12:05:32 pm by fixer »

Umbra

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Re: Office 2016 and mutex
« Reply #1 on: May 30, 2017, 07:17:34 pm »
Quote
If you have Office 2016 running non-isolated, starting it in isolation will result in crash.
not anymore :D

1- open a word 2016 docx non-isolated
2- open another word 2016 docx isolated in ReHIPS
3- no crashes
« Last Edit: May 30, 2017, 07:20:57 pm by Umbra »

fixer

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Re: Office 2016 and mutex
« Reply #2 on: May 30, 2017, 10:56:18 pm »
Guess it's not fixed then, good.