Microsoft ASP.NET Core CVE-2017-11770 Denial of Service Vulnerability

ID SMNTC-101710
Type symantec
Reporter Symantec Security Response
Modified 2017-11-14T00:00:00



Microsoft ASP.NET Core is prone to a remote denial of service vulnerability. An attacker can exploit this issue to cause a denial of service condition. ASP.NET Core 1.0, 1.1 and 2.0 are vulnerable.

Technologies Affected

  • Microsoft ASP.NET Core 1.0
  • Microsoft ASP.NET Core 1.1
  • Microsoft ASP.NET Core 2.0


Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.