CVE-2017-9248

CVE-2017-9248 is a critical-severity (CVSS 9.8) vulnerability in Progress ASP.NET AJAX and Sitefinity. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Progress has 9 vulnerabilities in the KEV catalog, 4 of them linked to ransomware.

Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect Telerik.Web.UI.DialogParametersEncryptionKey or the MachineKey, which makes it easier for remote attackers to defeat cryptographic protection mechanisms, leading to a MachineKey leak, arbitrary file uploads or downloads, XSS, or ASP.NET ViewState compromise.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• http://www.securityfocus.com/bid/99965
• http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinity
• http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weakness
• https://www.exploit-db.com/exploits/43873/
• http://www.securityfocus.com/bid/99965
• http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinity
• http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weakness
• https://www.exploit-db.com/exploits/43873/