CVE-2024-6327
📋 TL;DR
This CVE describes a remote code execution vulnerability in Progress Telerik Report Server caused by insecure deserialization. Attackers can exploit this to execute arbitrary code on affected systems. Organizations using Telerik Report Server versions before 2024 Q2 (10.1.24.709) are affected.
💻 Affected Systems
- Progress Telerik Report Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal data, install malware, pivot to other systems, and maintain persistent access.
Likely Case
Attackers gain remote code execution capabilities, potentially leading to data theft, ransomware deployment, or system takeover.
If Mitigated
With proper network segmentation and access controls, impact limited to isolated reporting systems with minimal data exposure.
🎯 Exploit Status
Insecure deserialization vulnerabilities are commonly exploited. While no public PoC exists at time of analysis, similar vulnerabilities in Telerik products have been weaponized quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024 Q2 (10.1.24.709) or later
Vendor Advisory: https://docs.telerik.com/report-server/knowledge-base/deserialization-vulnerability-cve-2024-6327
Restart Required: Yes
Instructions:
1. Download Telerik Report Server 2024 Q2 (10.1.24.709) or later from vendor portal. 2. Backup current configuration and reports. 3. Install the updated version following vendor documentation. 4. Restart the Report Server service.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Telerik Report Server to only trusted IP addresses and networks.
Use firewall rules to limit inbound connections to specific IP ranges
Application Layer Filtering
allImplement WAF rules to detect and block deserialization attacks.
Configure WAF to block requests containing serialized objects or suspicious payloads
🧯 If You Can't Patch
- Isolate the vulnerable system in a separate network segment with strict access controls
- Implement application-level monitoring and alerting for suspicious deserialization activity
🔍 How to Verify
Check if Vulnerable:
Check the Report Server version in the web interface under Settings > About, or examine the installation directory for version files.Check Version:
On Windows: Check registry at HKEY_LOCAL_MACHINE\SOFTWARE\Telerik\Report Server\Version. On Linux: Check /opt/telerik/reportserver/version.txtVerify Fix Applied:
Verify the version is 10.1.24.709 or higher and test that the Report Server functions normally after update.📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors in application logs
- Suspicious process creation from Report Server
- Unexpected network connections from Report Server process
Network Indicators:
- HTTP requests containing serialized objects to Report Server endpoints
- Outbound connections from Report Server to unknown external IPs
SIEM Query:
source="telerik-report-server" AND (error="deserialization" OR error="serialization")