Vulnerability identifier: #VU47861

Vulnerability risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2019-18935

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
UI for ASP.NET AJAX
Client/Desktop applications / Other client software

Vendor: Progress Telerik

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in the "RadAsyncUpload" function. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

UI for ASP.NET AJAX: 2019.3.1023

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.