Microsoft has recently released a security update for all supported operating systems. An elevation of privilege vulnerability exists when Windows Remote Access Improperly Handles Memory.

To exploit this vulnerability, an attacker would first have to gain execution on the victim system. An attacker could then run a specially crafted application to elevate privileges.

The security update addresses the vulnerability by correcting how Windows Remote Access handles memory. A privilege elevation vulnerability (CVE-2020-1530 and CVE-2020-1537) affects all supported versions of Windows Server so far.  This vulnerability exists when Windows Remote Access improperly handles memory or file operations. The exploit requires an attacker to have execution capabilities on the victim system. Systems hosting websites or with web-accessible services are particularly vulnerable.

For more information on this, refer the following Microsoft security advisory notifications:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1530

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1537

If you have still not patched your Server, you should apply this update as soon as possible. For Windows Server 2008 R2, it was reached to end of life in January 2020 and users will not receive any update for this. However security updates should be available for those users who have purchased extended support for Windows Server 2008 R2. If you are still using Windows Server 2008 R2, you should migrate to Windows Server 2016 or Windows Server 2019 to get security updates and other products updates.

This is another critical vulnerability patched by Microsoft within a month. Last month, CVE-2020-1350 was patched by Microsoft. CVE-2020-1350 was related to DNS server vulnerability and it was related to remote code execution.

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