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CVE-2019-18935

Status Candidate

Overview

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)

Related Files

Telerik UI ASP.NET AJAX RadAsyncUpload Deserialization
Posted Oct 20, 2020
Authored by Spencer McIntyre, Oleksandr Mirosh, Markus Wulftange, Alvaro Munoz, Paul Taylor, Caleb Gross, straightblast | Site metasploit.com

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).

tags | exploit, asp
advisories | CVE-2017-11317, CVE-2019-18935
SHA-256 | 2f6a8f760339d2c83d483651740d009b85c87d1a8e03ca388c1ef83409e65051
Telerik UI Remote Code Execution
Posted Dec 18, 2019
Authored by Markus Wulftange, Paul Taylor, Bishop Fox | Site know.bishopfox.com

The Telerik UI for ASP.NET AJAX insecurely deserializes JSON objects in a manner that results in arbitrary remote code execution on the software's underlying host.

tags | exploit, remote, arbitrary, code execution, asp
advisories | CVE-2019-18935
SHA-256 | 4aab62684a4cdf73f2ac375b58ade0ea344753c8d22b1fdf5f8a4e944c3eee54
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