CVE-2024-36304
📋 TL;DR
A Time-of-Check Time-of-Use (TOCTOU) vulnerability in Trend Micro Apex One and Apex One as a Service agents allows local attackers to escalate privileges on affected systems. Attackers must first have low-privileged code execution capability to exploit this flaw. This affects organizations using Trend Micro's Apex One security products.
💻 Affected Systems
- Trend Micro Apex One
- Trend Micro Apex One as a Service
📦 What is this software?
Apex One by Trendmicro
Apex One by Trendmicro
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains full SYSTEM/root privileges, enabling complete system compromise, data theft, lateral movement, and persistence.
Likely Case
Local attacker escalates from limited user to administrative privileges, allowing installation of malware, disabling security controls, and accessing sensitive data.
If Mitigated
With proper privilege separation and endpoint protection, impact limited to isolated user account compromise.
🎯 Exploit Status
Requires local code execution first; TOCTOU race condition exploitation requires precise timing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://success.trendmicro.com/dcx/s/solution/000298063
Restart Required: Yes
Instructions:
1. Access Trend Micro Apex One management console. 2. Check for available updates. 3. Apply security patch for agent. 4. Restart affected systems to complete installation.
🔧 Temporary Workarounds
Restrict local user privileges
windowsLimit local user accounts to minimum necessary privileges to reduce attack surface.
Enable application control
windowsUse application whitelisting to prevent unauthorized code execution.
🧯 If You Can't Patch
- Isolate affected systems from critical network segments
- Implement strict monitoring for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Apex One agent version against vendor advisory; vulnerable if running unpatched version.Check Version:
Check Apex One console or agent properties for version informationVerify Fix Applied:
Verify agent version matches patched version in vendor advisory and no privilege escalation attempts detected.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation with elevated privileges
- Security software tampering events
- Failed privilege escalation attempts
Network Indicators:
- None - local exploitation only
SIEM Query:
EventID=4688 AND NewProcessName contains suspicious AND ParentProcessName contains apex