CVE-2019-18935 Information

Description

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.)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html https://github.com/bao7uo/RAU_crypto https://github.com/noperator/CVE-2019-18935 https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-(version-2020-1-114) https://www.telerik.com/support/whats-new/release-history

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8