CVE-2017-9248: Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability
CVE-2017-9248 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03
Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX and Sitefinity contains a cryptographic weakness that fails to properly protect encryption keys. Remote attackers can exploit this to leak the MachineKey, perform arbitrary file uploads/downloads, execute XSS attacks, or compromise the ASP.NET ViewState.
Yes. CVE-2017-9248 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2017-9248?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 (2017.2.621); Progress Telerik Sitefinity before 10.0.6412.0.
Is there a fix for CVE-2017-9248?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2017-9248 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2017-9248?
Check whether you run Progress Asp.Net Ajax or Progress Sitefinity. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 (2017.2.621)
Progress Telerik Sitefinity before 10.0.6412.0
Timeline
2017-07-03: disclosed: NVD Published Date
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2018-01-24: other: Exploit-DB entry published (approximate based on reference date)