SRC-2020-0026 : Microsoft Exchange Server NewExchangeCertificate WriteRequest File Write Remote Code Execution Vulnerability

Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exchange Server. Authentication with the “Exchange Server Certificates” role is required to exploit this vulnerability.

The specific flaw exists within the processing of the New-ExchangeCertificate cmdlet. The issue results from the lack of proper validation of user-supplied data when writing files. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.

Affected Vendors:

Microsoft

Affected Products:

Exchange Server

Vendor Response:

Microsoft has issued an update to correct this vulnerability. More details can be found at:
<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-17084&gt;