Blue Mockingbird Vulnerability Picks up Steam—Telerik Guidance

The Blue Mockingbird malware attack, which is compromising the security of many web applications, including Microsoft Information Services, SharePoint and Citrix, is also targeting old Telerik UI vulnerabilities that have already been fixed.

The attack often uses the known vulnerabilities CVE-2017-11317 and CVE-2019-18935 to upload and execute the malicious software to versions that have not been upgraded to the latest version of the Telerik UI for ASP.NET AJAX (also known as RadControls for ASP.NET AJAX).

Both of the vulnerabilities are already fixed, and, when they were found, Progress notified all of our active and inactive customers with instructions and mitigation steps so they could secure their apps. See the following blog posts:

• First 5 Tips for Building Secure (Web) Apps
• Security Alert for Telerik UI for ASP.NET AJAX and Progress Sitefinity

For complete information, advice and instructions, please read the full post on Telerik.com.