CVE-2024-35254
📋 TL;DR
This CVE describes an elevation of privilege vulnerability in Azure Monitor Agent that allows authenticated attackers to gain higher privileges on affected systems. It affects Azure Monitor Agent installations on Windows and Linux systems where the agent is configured. Attackers could potentially execute code with SYSTEM/root privileges.
💻 Affected Systems
- Azure Monitor Agent
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with SYSTEM/root privileges, allowing complete control over the affected system, data exfiltration, and lateral movement within the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access sensitive data that would normally be restricted.
If Mitigated
Limited impact due to proper access controls, network segmentation, and monitoring that would detect unusual privilege escalation attempts.
🎯 Exploit Status
Exploitation requires authenticated access to the system. The CWE-59 (Improper Link Resolution Before File Access) suggests path traversal or symlink attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version of Azure Monitor Agent (specific version should be checked in Microsoft advisory)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-35254
Restart Required: Yes
Instructions:
1. Update Azure Monitor Agent to the latest version via Azure Update Management or manually. 2. Restart the agent service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Restrict agent service permissions
allLimit the Azure Monitor Agent service account to minimum required privileges
Implement file system restrictions
allApply strict file system permissions to directories accessible by the agent
🧯 If You Can't Patch
- Implement strict access controls and monitoring for systems running Azure Monitor Agent
- Isolate affected systems using network segmentation and limit lateral movement capabilities
🔍 How to Verify
Check if Vulnerable:
Check Azure Monitor Agent version and compare against patched version in Microsoft advisoryCheck Version:
Windows: Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like '*Azure Monitor Agent*'} | Select-Object Name, Version
Linux: dpkg -l | grep azure-monitor-agent OR rpm -qa | grep azure-monitor-agentVerify Fix Applied:
Verify Azure Monitor Agent version is updated to patched version and monitor for any privilege escalation attempts📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in Windows Event Logs or Linux audit logs
- Azure Monitor Agent service restarting unexpectedly
- File access patterns indicating path traversal attempts
Network Indicators:
- Unusual outbound connections from systems running Azure Monitor Agent
SIEM Query:
source="windows" EventCode=4688 OR source="linux" process="azure-monitor-agent" AND (privilege_escalation OR suspicious_file_access)