SRC-2020-0027 : Microsoft Exchange Server NewExchangeCertificate WriteRequest File Overwrite Denial of Service Vulnerability
Microsoft Exchange Server
This vulnerability allows remote attackers to cause a denial of service against affected installations of Exchange Server. Authentication 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 cause a denial of service.
Microsoft has issued an update to correct this vulnerability. More details can be found at:
- 2020-05-18 – Sent to Microsoft
- 2020-11-10 – Coordinated public release of advisory
This vulnerability was discovered by Steven Seeley (mr_me) of Qihoo 360 Vulcan Team