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Exchange CVE-2020-0688


Darren Poppleton

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Sure, don't publish the /ecp directory to the internet. 

Use for example NetScaler content switching to restrict which headers you allow, example:

 

add cs policy CS_Policy_Exchange-OWA -rule HTTP.REQ.HOSTNAME.SET_TEXT_MODE(IGNORECASE).EQ("mail.customer.com")&&HTTP.REQ.URL.SET_TEXT_MODE(IGNORECASE).CONTAINS("owa") -action CS_Action_Exchange-OWA

 

so /owa is allowed but if anyone tries to go to the /ecp directory your NetScaler will block this and no Exchange ECP is shown.

 

Regards

Julian

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