CVE-2025-30642
📋 TL;DR
A link following vulnerability in Trend Micro Deep Security 20.0 agents allows local attackers to create denial of service conditions. This affects systems running vulnerable versions of Deep Security agents where an attacker has already gained low-privileged code execution. The vulnerability requires local access to exploit.
💻 Affected Systems
- Trend Micro Deep Security Agent
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability requiring agent restart or system reboot, potentially disrupting security monitoring and protection.
Likely Case
Temporary service disruption of Deep Security agent functionality, requiring agent restart to restore normal operation.
If Mitigated
Minimal impact with proper access controls preventing low-privileged code execution and agent restart procedures in place.
🎯 Exploit Status
Requires local access and ability to execute low-privileged code; link following vulnerability typically involves manipulating file paths or symbolic links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest Deep Security agent version (check vendor advisory)
Vendor Advisory: https://success.trendmicro.com/en-US/solution/KA-0019344
Restart Required: Yes
Instructions:
1. Review vendor advisory KA-0019344. 2. Update Deep Security agents to latest version via Deep Security Manager or manual installation. 3. Restart affected agents after update.
🔧 Temporary Workarounds
Restrict local user privileges
allImplement least privilege access controls to prevent low-privileged code execution
Monitor agent health
allImplement monitoring to detect and automatically restart failed Deep Security agents
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local code execution
- Monitor agent processes and implement automated restart procedures for failed agents
🔍 How to Verify
Check if Vulnerable:
Check Deep Security agent version via Deep Security Manager or agent console; version 20.0 is vulnerable.Check Version:
On Windows: Check agent version in Control Panel > Programs. On Linux: Check agent version via package manager or agent status command.Verify Fix Applied:
Verify agent version is updated beyond 20.0 and agent services are running normally.📡 Detection & Monitoring
Log Indicators:
- Deep Security agent crash logs
- Unexpected agent service termination
- Permission denied errors in agent logs
Network Indicators:
- Loss of agent-to-manager communication
- Missing heartbeat signals from agents
SIEM Query:
source="deep_security" AND (event_type="agent_crash" OR event_type="service_stopped")