Remote code execution in Progress Telerik UI for ASP.NET AJAX

1) Deserialization of Untrusted Data

EUVDB-ID: #VU47861

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-18935

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes

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

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

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?

No. We are not aware of malware exploiting this vulnerability.