CVE-2021-33071
📋 TL;DR
This vulnerability allows authenticated local users to escalate privileges due to incorrect default permissions in the Intel oneAPI Rendering Toolkit installer. Attackers could gain elevated system access by exploiting weak file permissions. Only users with local authenticated access to systems running affected versions are impacted.
💻 Affected Systems
- Intel oneAPI Rendering Toolkit
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative/root privileges, allowing complete control over the affected system, data theft, and lateral movement.
Likely Case
Local privilege escalation to higher privilege levels, potentially enabling installation of malware, persistence mechanisms, or access to restricted data.
If Mitigated
Limited impact with proper access controls and monitoring; attackers would need to bypass additional security layers to achieve meaningful compromise.
🎯 Exploit Status
Exploitation requires local authenticated access and knowledge of vulnerable file locations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2021.2 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00564.html
Restart Required: No
Instructions:
1. Download Intel oneAPI Rendering Toolkit version 2021.2 or later from Intel's official website. 2. Uninstall previous vulnerable versions. 3. Install the updated version following Intel's installation guide.
🔧 Temporary Workarounds
Manual Permission Correction
allManually adjust file permissions on installed components to restrict write access to authorized users only.
chmod 755 /opt/intel/oneapi/rendering/* (Linux)
icacls "C:\Program Files\Intel\oneAPI\rendering\*" /inheritance:r /grant:r "Administrators:(OI)(CI)F" "Users:(OI)(CI)RX" (Windows)
🧯 If You Can't Patch
- Restrict local user access to systems running vulnerable software
- Implement strict file integrity monitoring on affected directories
🔍 How to Verify
Check if Vulnerable:
Check installed version of Intel oneAPI Rendering Toolkit; versions before 2021.2 are vulnerable.Check Version:
Linux: dpkg -l | grep intel-oneapi-rendering OR rpm -qa | grep intel-oneapi-rendering; Windows: Check Programs and Features or registry at HKEY_LOCAL_MACHINE\SOFTWARE\Intel\oneAPI\RenderingVerify Fix Applied:
Verify version is 2021.2 or later and check file permissions on installation directories.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- File permission changes in oneAPI directories
- Unauthorized access attempts to rendering toolkit files
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
EventID=4688 AND ProcessName LIKE '%oneapi%rendering%' AND NewIntegrityLevel>Medium