Check Point Advisories

Microsoft Exchange Information Disclosure (CVE-2021-33766)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0547
Date Published:	5 Sep 2021
Severity:	High
Last Updated:	Sunday 05 September, 2021
Source:
Industry Reference:	CVE-2021-33766
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Exchange Server
Vulnerability Description	An information disclosure vulnerability exists in Microsoft Exchange. Successful exploitation could result in the disclosure of sensitive information.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Exchange Information Disclosure (CVE-2021-33766) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Microsoft Exchange Information Disclosure (CVE-2021-33766)