External risk intelligence

Progress Telerik UI for ASP.NET AJAX File Upload Vulnerability

CVE advisoryKnown Exploit

CVE-2017-11357

A flaw in Progress Telerik UI for ASP.NET AJAX allows attackers to upload arbitrary files or execute code. This impacts organizations using the affected component, posing risks of unauthorized access, data compromise, and system disruption.

4Halo Surface Signal

Unrestricted File Upload

Progress Telerik Ui For Asp Net Ajax

before 2020.1.114

External exposure likelihood

Halo Surface Signal score for CVE-2017-11357

This vulnerability affects a UI component framework used in public-facing web applications. Because the affected component handles user-initiated file uploads via web requests, it is commonly deployed in internet-facing web applications, making the vulnerable surface reachable from the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

The Progress Telerik UI for ASP.NET AJAX component contains a flaw in its handling of user input for the RadAsyncUpload feature. This weakness allows for unauthorized file uploads and the execution of arbitrary code. The business impact includes potential system compromise and unauthorized data access.

  • Vulnerable file upload component
  • Flaw allows arbitrary file uploads
  • Potential for arbitrary code execution

Attack Path

How an attacker could exploit the issue

This vulnerability impacts organizations using Progress Telerik UI for ASP.NET AJAX. The attack targets the RadAsyncUpload component, which is exposed to external users. An attacker can exploit a weakness in how the component handles user input to upload malicious files or execute arbitrary code. This could lead to unauthorized access, data compromise, or system disruption.

  • External-facing applications with RadAsyncUpload.
  • Unrestricted user input to RadAsyncUpload.
  • Arbitrary file upload or code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows attackers to upload arbitrary files or execute code on affected systems. The issue is present in a component used for web application file uploads. Exploitation can lead to significant business risk, including unauthorized access and potential system compromise. Given the severity and potential for exploitation, organizations should prioritize addressing this vulnerability.

  • Attackers with low skill.
  • No special access required.
  • High business risk, treat as urgent.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability presents a significant risk to organizations utilizing the affected component. Exploitation can lead to unauthorized file uploads and remote code execution, potentially compromising system integrity and data confidentiality. The direct impact on business operations could include system disruption, data breaches, and reputational damage. Attackers can leverage this vulnerability to gain unauthorized access and control over affected systems.

  • Identify exposed Progress Telerik UI assets.
  • Reduce exposure or isolate risk.
  • Apply vendor fix and validate.
  • Monitor for related issues.

Frequently asked questions

What is Progress Telerik UI for ASP.NET AJAX and its function?

Progress Telerik UI for ASP.NET AJAX is a robust suite of over 120 user interface components designed for creating professional, high-quality web applications. Developers utilize it to build data-rich and feature-extensive applications, speeding up web development by offering pre-built controls for various functionalities.

What specific vulnerability affects Progress Telerik UI for ASP.NET AJAX?

CVE-2017-11357 is an "Unrestricted Upload of File with Dangerous Type" vulnerability (CWE-434) present in the RadAsyncUpload component of Progress Telerik UI for ASP.NET AJAX. This flaw permits attackers to upload any files or execute code due to inadequate handling of user-submitted data.

How can an attacker exploit the CVE-2017-11357 vulnerability?

An attacker can exploit this vulnerability by leveraging the improper handling of user input within the RadAsyncUpload component. This allows for the upload of malicious files or the execution of arbitrary code, potentially leading to unauthorized system access or compromise.

What is the relevance of CVE-2017-11357 affecting Telerik UI for ASP.NET AJAX?

This vulnerability is significant because it affects a UI component framework commonly used in public-facing web applications. The RadAsyncUpload component, which handles file uploads, is reachable from the public internet, increasing the attack surface.

What is the recommended action for organizations regarding CVE-2017-11357?

Organizations should identify Progress Telerik UI assets that are exposed, reduce their exposure or isolate the risk, and apply vendor-provided fixes. It is also crucial to validate the successful application of patches and monitor for any related security incidents.

References