CVE-2024-7250
📋 TL;DR
This vulnerability in Comodo Internet Security Pro allows local attackers to escalate privileges from low-privileged user accounts to SYSTEM level by exploiting a symbolic link handling flaw in the cmdagent executable. Attackers must first gain execution capability on the target system. Only installations of Comodo Internet Security Pro are affected.
💻 Affected Systems
- Comodo Internet Security Pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling arbitrary code execution, persistence mechanisms, credential theft, and lateral movement across the network.
Likely Case
Local privilege escalation leading to installation of malware, backdoors, or credential harvesting tools on the compromised system.
If Mitigated
Limited impact if proper endpoint controls, least privilege principles, and application allowlisting are implemented to prevent initial low-privileged code execution.
🎯 Exploit Status
Requires local access and ability to execute low-privileged code first. Symbolic link manipulation requires specific conditions but is well-understood technique.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-24-955/
Restart Required: Yes
Instructions:
1. Update Comodo Internet Security Pro to latest version. 2. Check vendor advisory for specific patched version. 3. Restart system after update.
🔧 Temporary Workarounds
Restrict symbolic link creation
windowsConfigure Windows security policy to restrict who can create symbolic links
Configure via Group Policy: Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment > Create symbolic links
Disable Comodo cmdagent service
windowsTemporarily disable the vulnerable service if not critically needed
sc stop cmdagent
sc config cmdagent start= disabled
🧯 If You Can't Patch
- Implement strict least privilege principles to limit initial low-privileged code execution opportunities
- Deploy application control/allowlisting to prevent unauthorized executables from running
🔍 How to Verify
Check if Vulnerable:
Check Comodo Internet Security Pro version and compare against vendor's patched version listCheck Version:
Check Comodo interface for version information or examine installed programs in Control PanelVerify Fix Applied:
Verify Comodo is updated to latest version and cmdagent service is running patched version📡 Detection & Monitoring
Log Indicators:
- Unusual symbolic link creation events in Windows security logs
- cmdagent process spawning unexpected child processes
- Privilege escalation attempts from user to SYSTEM context
Network Indicators:
- None - local exploitation only
SIEM Query:
Process creation where parent_process_name contains 'cmdagent' AND (process_name contains 'powershell' OR process_name contains 'cmd' OR process_name contains 'rundll32')