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Discussion Lists, NIST We have identified a security vulnerability affecting UI for ASP.NET AJAX that exists in versions of Telerik.Web.UI.dll assembly prior to 2017.2.621, as well as Sitefinity versions prior to 10.0.6412.0.We have addressed the issue and have notified customers and partners with details on how to fix the vulnerability. Telerik. Disclaimer | Scientific Progress Telerik UI for ASP.NET AJAX up to and including 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. inferences should be drawn on account of other sites being The attack is also targeting old Telerik UI vulnerabilities that have already been patched. Statement | NIST Privacy Program | No Telerik provided fixes to Sitecore as custom updates for assembly versions that are compatible with Sitecore CMS/XP. This script also ensures that each uploaded file has a unique name on disk. Open a Netcat listener to catch the callback: CVE-2017-11317 — Unrestricted File Upload via Weak Encryption, CVE-2019-18935 — Remote Code Execution via Insecure Deserialization, Verify Deserialization Vulnerability with Sleep(), System.Configuration.Install.AssemblyInstaller, Server-Side Spreadsheet Injection - Formula Injection to Remote Code Execution, RMIScout: Safely and Quickly Brute-Force Java RMI Interfaces for Code Execution, GadgetProbe: Exploiting Deserialization to Brute-Force the Remote Classpath. USGCB, US-CERT Security Operations Center Email: soc@us-cert.gov Phone: Please let us know. He noted that rauPostData contains both the serialized configuration object and the object's type. AsyncUploadHandler uses the type specified within rauPostData to prepare .NET's JavaScriptSerializer.Deserialize() method to properly deserialize the object. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. RadAsyncUpload will upload your file to a temporary directory whose location is under your control. - Your app will be safe from the known vulnerabiltieis if the Telerik.Web.UI.dll assembly is released before Q1 2010 (version 2010.1.309) or … Rather than submitting the usual expected Telerik.Web.UI.AsyncUploadConfiguration type within rauPostData, an attacker can submit a file upload POST request specifying the type as an RCE gadget instead. ), Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. No Links to Telerik UI security vulnerablities CVE-2014-2217, CVE-2017-11317 and CVE-2019-18935 were added to References on 12-May-20. All code references in this post are also available in the CVE-2019-18935 GitHub repo. Exploitation can result in remote code execution. Absolute path traversal vulnerability in the RadAsyncUpload control in the RadControls in … NIST does [0-9]*)+ (and make sure you check the "Regex" box). Thanks @mwulftange initially discovered this vulnerability. This vulnerability has been modified since it was last analyzed by the NVD. After covering the context of those two CVEs, we’ll dive deeper into the insecure deserialization vulnerability to learn if it affects your system, how the exploit works, and how you can patch systems against this vulnerability. Invoke the script as follows: If the application pauses for approximately 10 seconds before responding, you've got a working deserialization exploit! (In 2019.3.1023 but not earlier versions, a non-default setting can prevent exploitation.). As such, computer code written using .NET Framework is called "managed code.". This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. ", Last-Modified: Wed, 20 Feb 2013 00:00:00 GMT, VGhpcyBpc24ndCByZWFsIGRhdGEsIGJ1dCB0aGUgQmFzZTY0LWVuY29kZWQgZGF0YSBsb29rcyBqdXN0IGxpa2UgdGhpcy4=, "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat", Sets environment variables to compile both 32- and 64-bit code, The following exploit script leverages the core RadAsyncUpload encryption logic provided by Paul Taylor's, 'Telerik.Web.UI.AsyncUploadConfiguration, Telerik.Web.UI, Version=', ', Culture=neutral, PublicKeyToken=121fae78165ba3d4', 'System.Configuration.Install.AssemblyInstaller, System.Configuration.Install, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The location of the version string isn't consistent, though, so the best method of locating it is to use Burp to search for the regular expression 20[0-9]{2}(\. Let's break these down a bit, starting with a useful description from Wikipedia about how programs execute when developed in .NET: Programs written for .NET Framework execute in a software environment (in contrast to a hardware environment) named the Common Language Runtime (CLR). Since Telerik has just responded to this issue by releasing a security advisory for CVE-2019-18935, we're sharing our knowledge about it here in an effort to raise awareness about the severity of this vulnerability, and to encourage affected users to patch and securely configure this software. RadAsyncUpload introduced in Q1 2010 (version 2010.1.309) offers asynchronous upload capability while maintaining the look of the regular RadUpload control. Integrity Summary | NIST The control addresses the limitation to perform file uploads with plain post backs only, and supports web farm scenarios, as well as internal validation, using its http handler for this purpose. By selecting these links, you will be leaving NIST webspace. python >= 3.6 with pycryptodome (https://www.pycryptodome.org/en/latest/src/installation.html) - installed with pip3 install pycryptodome or pip3 install pycryptodomex 1-888-282-0870, Sponsored by Exploitation can result in remote code execution. It insecurely deserializes JSON objects in a manner that results in arbitrary remote code execution on the software's underlying host. Security vulnerabilities were identified in Sitefinity CMS. Attackers are actively scanning for and attempting to exploit the vulnerability discovered in a number of Telerik products November 2019, which was the subject of a previous ACSC advisory. Information Quality Standards, Business Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code. After using the aforementioned unrestricted file upload vulnerability to upload a malicious mixed mode assembly DLL, an attacker may follow up with a second request to force JavaScriptSerializer to deserialize an object of type System.Configuration.Install.AssemblyInstaller. For more information … Current Description Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a.NET deserialization vulnerability in the RadAsyncUpload function. # One extra input is required for the page to process the request. Note that I use C, rather than C++, because I've encountered rare occasions where I was unable to execute compiled C++ code on a remote server. the new file to the old one. endorse any commercial products that may be mentioned on You can also accomplish this with cURL: If that doesn't work, you can alternatively search for the string