module

Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization

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Disclosed
12/09/2019
Created
10/21/2020

Description

This 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').

Authors

Spencer McIntyrePaul TaylorMarkus WulftangeCaleb GrossAlvaro MuñozOleksandr Miroshstraightblast

Platform

Windows

Architectures

x86, x64

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:

    msf > use exploit/windows/http/telerik_rau_deserialization
    msf /(n) > show actions
        ...actions...
    msf /(n) > set ACTION < action-name >
    msf /(n) > show options
        ...show and set options...
    msf /(n) > run
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