CVE-2017-11317 in UI for ASP.NET AJAX
Summary
by MITRE
Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
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Analysis
by VulDB Data Team • 09/09/2024
The vulnerability identified as CVE-2017-11317 affects Progress Telerik UI for ASP.NET AJAX components, specifically targeting the RadAsyncUpload functionality that enables asynchronous file uploads in web applications. This issue impacts versions prior to R1 2017 and R2 before R2 2017 SP2, representing a critical security flaw that undermines the integrity of file upload mechanisms within affected applications. The vulnerability stems from the implementation of weak encryption algorithms within the RadAsyncUpload component, which fails to provide adequate protection for uploaded files during transmission and storage processes.
The technical flaw manifests through insufficient cryptographic protection of file upload operations, allowing malicious actors to exploit the weak encryption mechanisms to manipulate or bypass security controls. Attackers can leverage this vulnerability to perform arbitrary file uploads, potentially uploading malicious executables or scripts that can be executed on the target server. This weakness creates a pathway for remote code execution, as the system fails to properly validate or encrypt the file transfer process, enabling attackers to gain unauthorized access to server resources. The vulnerability directly relates to CWE-327, which addresses the use of weak cryptographic algorithms, and CWE-20, which covers improper input validation in software applications.
The operational impact of this vulnerability extends beyond simple unauthorized file uploads, as it creates a complete compromise of server security infrastructure. Organizations utilizing affected Telerik components face significant risks including data breaches, system infiltration, and potential complete server takeover. The vulnerability can be exploited remotely without requiring authentication, making it particularly dangerous for web applications that handle sensitive user data or business-critical information. Attackers can leverage this weakness to establish persistent access, deploy malware, or use the compromised system as a launch point for further attacks within the network infrastructure.
Mitigation strategies for CVE-2017-11317 require immediate implementation of version updates to the affected Telerik UI for ASP.NET AJAX components, specifically upgrading to R1 2017 or R2 2017 SP2 and later releases. Organizations should also implement additional security controls including strict file type validation, mandatory file extension filtering, and enhanced server-side verification of uploaded content. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense against exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all instances of the affected components within their infrastructure and implement proper monitoring for suspicious upload activities. The remediation process must also include thorough testing of updated components to ensure that security improvements do not introduce compatibility issues with existing applications. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application and T1059 - Command and Scripting Interpreter, demonstrating the multi-stage attack vector that security professionals must address through layered defensive measures.