Microsoft released a security update for the issue that is described in CVE-2020-1350 | Windows DNS Server Remote Code Execution Vulnerability. This advisory describes a Critical Remote Code Execution (RCE) vulnerability that affects Windows servers that are configured to run the DNS Server role.
The vulnerability has the score of 10.0/10.0 (critical), according to the scale published on the Common Vulnerability Scoring System (CVSS). More information about the score of the vulnerability can be found here:nvd.nist.gov
What is the issue?
This means that an attacker is possibly capable of gaining full control over the DNS server using remote code execution or performing denial of service (DOS) attack on the server.
Systems impacted
- Windows Server 2019
- Windows Server 2019 (Server Core installation)
- Windows Server, version 1909 (Server Core installation)
- Windows Server, version 1903 (Server Core installation)
- Windows Server, version 2004 (Server Core installation)
- Windows Server 2016
- Windows Server 2016 (Server Core installation)
- Windows Server 2008 for 32-bit Systems Service Pack 2
- Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 for x64-based Systems Service Pack 2
- Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 R2 for x64-based Systems Service Pack 1
- Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- Windows Server 2012
- Windows Server 2012 (Server Core installation)
- Windows Server 2012 R2
- Windows Server 2012 R2 (Server Core installation)
What can you do to protect yourself?
According to Microsoft, this vulnerability is not currently known to be used in active attacks. It is essential that customers apply Windows updates to address this vulnerability as soon as possible. If applying the update quickly is not practical, a registry-based workaround is available that does not require restarting the server.
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350