CVE-2024-3892
📋 TL;DR
A local code execution vulnerability in Telerik UI for WinForms allows untrusted theme assemblies to execute arbitrary code on Windows systems. This affects applications using Telerik UI for WinForms versions 2021.1.122 through 2024.2.513. Attackers could gain full control of affected systems.
💻 Affected Systems
- Telerik UI for WinForms
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, data theft, ransomware deployment, and lateral movement across the network.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive data and system resources.
If Mitigated
Limited impact with proper application sandboxing and restricted user permissions.
🎯 Exploit Status
Requires local access and ability to load malicious theme assemblies. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2024.2.514 and later
Vendor Advisory: https://docs.telerik.com/devtools/winforms/knowledge-base/local-code-execution-vulnerability-cve-2024-3892
Restart Required: Yes
Instructions:
1. Download Telerik UI for WinForms v2024.2.514 or later from Telerik website
2. Update all affected applications to use the patched version
3. Rebuild and redeploy applications
4. Restart affected systems
🔧 Temporary Workarounds
Restrict Theme Assembly Loading
windowsConfigure applications to only load theme assemblies from trusted sources and locations.
Application Sandboxing
windowsRun affected applications with minimal privileges using Windows AppLocker or similar controls.
🧯 If You Can't Patch
- Implement strict access controls to prevent untrusted users from loading theme assemblies
- Monitor for suspicious theme assembly loading behavior using application logs
🔍 How to Verify
Check if Vulnerable:
Check Telerik UI for WinForms version in application assemblies. Versions between 2021.1.122 and 2024.2.513 are vulnerable.Check Version:
Check Telerik.Windows.Controls.dll or similar assembly version in application directoryVerify Fix Applied:
Verify application uses Telerik UI for WinForms v2024.2.514 or later and test theme loading functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected theme assembly loading events
- Process creation from Telerik UI applications with unusual parameters
Network Indicators:
- None - this is a local execution vulnerability
SIEM Query:
Process Creation where Parent Process contains 'Telerik' AND Command Line contains unusual theme paths