CVE-2024-10930
📋 TL;DR
This vulnerability allows attackers to perform DLL hijacking by placing a malicious DLL in a location searched by the affected software before legitimate system directories. This could lead to arbitrary code execution with escalated privileges. Affected systems include specific Carrier building automation products.
💻 Affected Systems
- Carrier CCN, i-Vu, and other building automation controllers
📦 What is this software?
Block Load by Carrier
Block Load by Carrier
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative privileges, enabling persistent access, data theft, and lateral movement across networks.
Likely Case
Local privilege escalation leading to unauthorized control of building automation systems, potential disruption of HVAC/security systems.
If Mitigated
Limited impact with proper application whitelisting and DLL search path restrictions in place.
🎯 Exploit Status
DLL hijacking is a well-known technique requiring local access or ability to place files on target system.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Carrier advisory for specific product versions
Vendor Advisory: https://www.corporate.carrier.com/product-security/advisories-resources/
Restart Required: Yes
Instructions:
1. Review Carrier advisory ICSA-25-063-01. 2. Identify affected products and versions. 3. Download and apply vendor-provided patches. 4. Restart affected systems. 5. Verify patch installation.
🔧 Temporary Workarounds
Restrict DLL Search Path
windowsConfigure system to search system directories first before application directories
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Name "SafeDllSearchMode" -Value 1
Application Whitelisting
windowsImplement application control policies to prevent unauthorized DLL loading
🧯 If You Can't Patch
- Implement strict file system permissions to prevent unauthorized DLL placement
- Use application control solutions to restrict which DLLs can be loaded
🔍 How to Verify
Check if Vulnerable:
Check installed Carrier software versions against advisory, look for DLL search path vulnerabilities in application configurationCheck Version:
Check software version through Carrier management interface or Windows Programs and FeaturesVerify Fix Applied:
Verify patch version installation, test DLL loading behavior with controlled test files📡 Detection & Monitoring
Log Indicators:
- Unexpected DLL loading from non-system directories
- Process execution with unexpected parent processes
- File creation events in application directories
Network Indicators:
- Unusual outbound connections from building automation systems
- Anomalous authentication attempts
SIEM Query:
source="windows-security" EventID=4688 AND (ProcessName="*carrier*" OR ProcessName="*ccn*") AND CommandLine="*dll*"