CVE-2024-33580
📋 TL;DR
A DLL hijack vulnerability in Lenovo Personal Cloud allows a local attacker 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 Personal Cloud software. Attackers could gain SYSTEM-level access on affected systems.
💻 Affected Systems
- Lenovo Personal Cloud
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, allowing installation of persistent malware, data theft, and lateral movement within the network.
Likely Case
Local privilege escalation leading to unauthorized administrative access, data exfiltration, and potential ransomware deployment.
If Mitigated
Limited impact if proper application whitelisting, DLL search path hardening, and least privilege principles are implemented.
🎯 Exploit Status
DLL hijacking is a well-known attack technique. Exploitation requires local access and ability to place malicious DLL in specific directory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in advisory, but Lenovo has released updates
Vendor Advisory: https://iknow.lenovo.com.cn/detail/423563
Restart Required: Yes
Instructions:
1. Visit Lenovo support site. 2. Download latest Lenovo Personal Cloud update. 3. Install update. 4. Restart system.
🔧 Temporary Workarounds
Restrict DLL search paths
windowsUse Windows policies to restrict DLL search order and prevent loading from current directory
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Name "SafeDllSearchMode" -Value 1
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Name "CWDIllegalInDllSearch" -Value 0xffffffff
Remove unnecessary permissions
windowsRemove write permissions from directories where Lenovo Personal Cloud runs
icacls "C:\Program Files\Lenovo\Personal Cloud" /deny Users:(OI)(CI)W
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized DLLs
- Run Lenovo Personal Cloud with least privilege account (not as SYSTEM or Administrator)
🔍 How to Verify
Check if Vulnerable:
Check Lenovo Personal Cloud version against patched versions in advisory. Monitor for DLL loading from insecure paths using Process Monitor.Check Version:
Check application version in Control Panel > Programs and Features or via wmic product where name="Lenovo Personal Cloud" get versionVerify Fix Applied:
Verify Lenovo Personal Cloud has been updated to latest version. Test DLL hijack attempt fails after patch.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing DLL loading from unusual paths (Event ID 7)
- Process creation events for suspicious DLLs from Lenovo Personal Cloud directory
Network Indicators:
- Unusual outbound connections from Lenovo Personal Cloud process post-exploitation
SIEM Query:
source="Windows Security" EventID=4688 ProcessName="*PersonalCloud*" | search CommandLine="*dll*"