CVE-2024-4089
📋 TL;DR
A DLL hijack vulnerability in Lenovo Super File allows local attackers to execute arbitrary code with elevated privileges by placing a malicious DLL in a location where the application searches for it. This affects users running vulnerable versions of Lenovo Super File on Windows systems. Attackers need local access to the system to exploit this vulnerability.
💻 Affected Systems
- Lenovo Super File
📦 What is this software?
Superfile by Lenovo
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative privileges, allowing installation of persistent malware, data theft, and lateral movement across the network.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive files, system configuration changes, and potential persistence mechanisms.
If Mitigated
Limited impact with proper application whitelisting, restricted user permissions, and security monitoring in place.
🎯 Exploit Status
DLL hijacking is a well-known attack technique. Exploitation requires the attacker to place a malicious DLL where the application will load it, typically requiring some level of local access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in reference, but Lenovo has released a fix
Vendor Advisory: https://iknow.lenovo.com.cn/detail/423563
Restart Required: Yes
Instructions:
1. Visit the Lenovo advisory URL. 2. Download the latest version of Lenovo Super File. 3. Install the update. 4. Restart the system to ensure changes take effect.
🔧 Temporary Workarounds
Remove or restrict Lenovo Super File
windowsUninstall Lenovo Super File if not needed, or restrict its execution to prevent DLL hijacking.
Uninstall via Control Panel > Programs and Features
Apply DLL search path hardening
windowsUse application control policies to restrict DLL loading from untrusted directories.
🧯 If You Can't Patch
- Implement strict application whitelisting to prevent unauthorized execution of Lenovo Super File
- Restrict user permissions to prevent local users from placing files in directories where Lenovo Super File searches for DLLs
🔍 How to Verify
Check if Vulnerable:
Check the version of Lenovo Super File installed. If it's not the latest patched version, assume vulnerability.Check Version:
Check program version in Control Panel > Programs and Features or via the application's About dialogVerify Fix Applied:
Verify that Lenovo Super File has been updated to the latest version and test that DLL hijacking attempts are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation by Lenovo Super File
- DLL loading from unexpected directories
- Failed DLL load attempts from secure locations
Network Indicators:
- Outbound connections from Lenovo Super File to unexpected destinations
SIEM Query:
Process Creation where Image contains 'Super File' AND Parent Process is not expected