Wednesday, October 21, 2020

Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization

This Metasploit module exploits the .NET deserialization vulnerability within the RadAsyncUpload (RAU) component of Telerik UI ASP.NET AJAX that is identified as CVE-2019-18935. In order to do so the module must upload a mixed mode .NET assembly DLL which is then loaded through the deserialization flaw. Uploading the file requires knowledge of the cryptographic keys used by RAU. The default values used by this module are related to CVE-2017-11317, which once patched randomizes these keys. It is also necessary to know the version of Telerik UI ASP.NET that is running. This version number is in the format YYYY.#(.###)? where YYYY is the year of the release (e.g. 2020.3.915).
Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization
 

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Thanks for everything Templateism - You should have written the code a little more complicated