CVE-2024-7576: Telerik UI for WPF RCE Vulnerability

CVE-2024-7576 Overview

CVE-2024-7576 is a critical insecure deserialization vulnerability affecting Progress Telerik UI for WPF versions prior to 2024 Q3 (2024.3.924). This vulnerability allows attackers to achieve remote code execution by exploiting unsafe deserialization of untrusted data within the application framework. Telerik UI for WPF is a widely-used UI component library for building Windows Presentation Foundation applications, making this vulnerability particularly concerning for enterprise environments.

Critical Impact

Successful exploitation enables attackers to execute arbitrary code on systems running vulnerable versions of Telerik UI for WPF, potentially leading to complete system compromise, data theft, and lateral movement within networks.

Affected Products

• Telerik UI for WPF versions prior to 2024.3.924 (2024 Q3)
• All applications built using vulnerable Telerik UI for WPF components
• Windows-based systems running affected WPF applications

Discovery Timeline

• 2024-09-25 - CVE-2024-7576 published to NVD
• 2024-10-03 - Last updated in NVD database

Technical Details for CVE-2024-7576

Vulnerability Analysis

This vulnerability is classified as CWE-502 (Deserialization of Untrusted Data). Insecure deserialization occurs when an application deserializes data from an untrusted source without proper validation, allowing attackers to manipulate serialized objects to execute malicious code. In the context of Telerik UI for WPF, the framework processes serialized data in a manner that does not adequately validate the integrity or origin of the data before deserialization.

The vulnerability is accessible over the network without requiring any privileges or user interaction, which significantly increases the risk profile. Successful exploitation can result in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of CVE-2024-7576 lies in the improper handling of serialized objects within Telerik UI for WPF. The framework does not implement sufficient type validation or input sanitization before deserializing incoming data. This allows an attacker to craft malicious serialized payloads that, when processed by the vulnerable component, instantiate dangerous object types that execute attacker-controlled code.

Deserialization vulnerabilities in .NET frameworks often exploit gadget chains—sequences of existing code within the application or its dependencies that can be chained together to achieve code execution when triggered by a maliciously crafted serialized object.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker can exploit this vulnerability by sending specially crafted serialized data to an application using the vulnerable Telerik UI for WPF components. The attack does not require authentication or user interaction, making it particularly dangerous for exposed applications.

The exploitation process typically involves:

1. Identifying an application using vulnerable Telerik UI for WPF versions
2. Crafting a malicious serialized payload containing a gadget chain
3. Sending the payload to an endpoint that processes serialized data
4. The vulnerable component deserializes the payload, triggering code execution

Due to the nature of this vulnerability, exploitation techniques are well-documented in the security community. Attackers may leverage existing .NET deserialization tools such as ysoserial.net to generate appropriate payloads targeting the vulnerable components.

Detection Methods for CVE-2024-7576

Indicators of Compromise

• Unusual network traffic patterns to WPF-based applications containing serialized .NET object data
• Unexpected process spawning from applications using Telerik UI for WPF
• Anomalous PowerShell, cmd.exe, or other shell process execution originating from WPF application processes
• Evidence of gadget chain usage patterns in network payloads or memory analysis

Detection Strategies

• Deploy application-layer intrusion detection to identify serialized .NET payloads in network traffic
• Monitor application logs for deserialization errors or exceptions that may indicate exploitation attempts
• Use endpoint detection and response (EDR) solutions to detect suspicious child process creation from WPF applications
• Implement file integrity monitoring on application directories to detect unauthorized modifications

Monitoring Recommendations

• Enable detailed logging for applications using Telerik UI for WPF components
• Configure alerts for unusual process creation patterns from .NET applications
• Monitor for network connections to known malicious infrastructure from WPF application processes
• Review application error logs for serialization-related exceptions that could indicate attack attempts

How to Mitigate CVE-2024-7576

Immediate Actions Required

• Upgrade Telerik UI for WPF to version 2024.3.924 (2024 Q3) or later immediately
• Conduct an inventory of all applications using Telerik UI for WPF to identify vulnerable deployments
• Apply network segmentation to limit exposure of applications using vulnerable components
• Enable enhanced monitoring and logging for affected applications until patching is complete

Patch Information

Progress has released Telerik UI for WPF version 2024.3.924 (2024 Q3) which addresses this vulnerability. Organizations should update to this version or later as soon as possible. For detailed patching guidance and technical information, refer to the Telerik Unsafe Deserialization Advisory.

Workarounds

• If immediate patching is not possible, implement strict input validation on all data processed by the application
• Consider temporarily disabling or restricting access to functionality that processes external serialized data
• Deploy web application firewalls (WAF) or network filters to block known malicious serialization patterns
• Implement network access controls to limit who can reach applications using vulnerable components