CVE-2019-18935: Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability

CVE-2019-18935 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

Progress Telerik UI for ASP.NET AJAX contains a .NET deserialization vulnerability in the RadAsyncUpload function. When encryption keys are known, an unauthenticated attacker can achieve remote code execution on the server.

Technologies: Progress Telerik Ui For Asp.Net Ajax. Vendors: Progress.

Quick answers

Is CVE-2019-18935 exploited in the wild?
Yes. CVE-2019-18935 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2019-18935?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Telerik UI for ASP.NET AJAX through 2019.3.1023.
Is there a fix for CVE-2019-18935?
A patch was published on 2020-01-14: Fixed in version 2020.1.114 where a default setting prevents the exploit Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2019-18935 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2019-18935?
Check whether you run Progress Telerik Ui For Asp.Net Ajax. 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

  • Telerik UI for ASP.NET AJAX through 2019.3.1023

Timeline

  • 2019-12-17: disclosed: Initial public disclosure via Packet Storm
  • 2020-01-14: patched: Fixed in version 2020.1.114 where a default setting prevents the exploit
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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