External risk intelligence

Telerik UI for ASP.NET AJAX File Upload and Code Execution Vulnerability

CVE advisoryKnown Exploit

CVE-2017-11317

A weakness in Telerik UI for ASP.NET AJAX's file upload encryption allows attackers to upload files or execute code. This affects organizations using specific versions of the component, posing risks to systems and data.

4Halo Surface Signal

Telerik Ui For Asp Net Ajax

2016.3.1027 and earlier2017.2.5032017.2.621

External exposure likelihood

Halo Surface Signal score for CVE-2017-11317

This vulnerability affects a widely used UI framework for ASP.NET web applications. Components such as file upload controls are frequently exposed to the public internet as part of the standard functionality of web-based forms, portals, and application interfaces.

Horizon Alert

Summary of the vulnerability and why it matters

The Progress Telerik UI for ASP.NET AJAX component has a weakness in its encryption for file uploads. This flaw can permit remote attackers to upload unauthorized files or run malicious code on affected systems. The potential impact includes unauthorized data access, system compromise, and disruption of business operations.

  • Vulnerable file upload component
  • Weak encryption allows file manipulation
  • Arbitrary file upload or code execution

Attack Path

How an attacker could exploit the issue

This vulnerability impacts organizations using specific versions of Telerik UI for ASP.NET AJAX. Attackers can exploit weak encryption in the RadAsyncUpload component. This allows for unauthorized file uploads or arbitrary code execution, posing a significant risk to affected systems and data.

  • Exposure condition: Weak encryption in upload component.
  • Attacker starting point: Publicly accessible web application.
  • Trigger and result: Arbitrary file upload or code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a critical risk due to the potential for attackers to upload arbitrary files or execute arbitrary code remotely. The attack requires no special privileges or conditions, making it broadly accessible to threat actors. Its inclusion on the known exploited vulnerabilities catalog indicates a history of real-world exploitation and suggests organizations should treat it with high urgency.

  • Attackers require no special skill.
  • No special access or conditions needed.
  • High business risk and urgency.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Telerik UI for ASP.NET AJAX could allow attackers to upload arbitrary files or execute arbitrary code on affected systems. This poses a significant risk to organizational data and operations. The weak encryption in the RadAsyncUpload component is the primary concern.

  • Identify systems using Telerik UI for ASP.NET AJAX.
  • Restrict network access to vulnerable components.
  • Update to vendor-provided fixes and confirm resolution.

Frequently asked questions

What is Telerik UI for ASP.NET AJAX and what does it do?

Telerik UI for ASP.NET AJAX is a suite of user interface components that developers use to build dynamic and interactive web applications. It provides a wide range of tools for creating rich user experiences, including features for data management, navigation, and user input.

What specific weakness does CVE-2017-11317 describe?

CVE-2017-11317 describes a weakness classified as CWE-326, which refers to the use of weak encryption. In this instance, the encryption used in Telerik's RadAsyncUpload component is insufficient, potentially allowing attackers to bypass security controls.

How can attackers exploit the Telerik UI vulnerability?

Attackers can exploit this vulnerability by leveraging the weak encryption within the RadAsyncUpload component. This could enable them to upload arbitrary files to the server or, in some cases, execute arbitrary code, leading to potential system compromise.

What is the relevance of CVE-2017-11317 to organizations?

This vulnerability is relevant because it affects a widely used component for web applications and carries a critical severity score. Its presence on the Known Exploited Vulnerabilities (KEV) catalog indicates it has been actively exploited, posing a significant risk to organizations that use the affected Telerik UI versions.

What steps should be taken to address this Telerik UI vulnerability?

Organizations should first identify all systems utilizing Telerik UI for ASP.NET AJAX and determine if they are running vulnerable versions. Applying the latest updates or patches provided by Telerik is the primary remediation step, followed by verifying that the fix has been successfully implemented.

References