CVE-2021-1052
📋 TL;DR
This vulnerability in NVIDIA GPU Display Driver allows user-mode applications to access privileged kernel APIs through the DxgkDdiEscape or IOCTL handlers. This could lead to denial of service, privilege escalation, or information disclosure. All users of NVIDIA GPU Display Driver on Windows and Linux are affected.
💻 Affected Systems
- NVIDIA GPU Display Driver
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with kernel-level privilege escalation, allowing attackers to execute arbitrary code, steal sensitive data, or cause permanent system damage.
Likely Case
Local privilege escalation allowing attackers to gain administrative privileges on the affected system, potentially leading to lateral movement within networks.
If Mitigated
Limited impact with proper access controls and monitoring, potentially only denial of service if exploitation attempts are detected and blocked.
🎯 Exploit Status
Exploitation requires local access to the system and knowledge of the vulnerable API calls. No public proof-of-concept has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest NVIDIA GPU Display Driver versions as specified in NVIDIA security bulletin
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5142
Restart Required: Yes
Instructions:
1. Download the latest NVIDIA GPU Display Driver from NVIDIA's official website. 2. Uninstall the current driver. 3. Install the updated driver. 4. Restart the system.
🔧 Temporary Workarounds
Restrict User Access
allLimit user access to systems with vulnerable NVIDIA drivers to reduce attack surface
Monitor for Suspicious Activity
allImplement monitoring for unusual driver or kernel activity
🧯 If You Can't Patch
- Implement strict access controls to limit who can access systems with vulnerable drivers
- Deploy additional monitoring and detection for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check NVIDIA driver version against patched versions listed in NVIDIA security bulletinCheck Version:
Windows: nvidia-smi (in command prompt) or check Display Driver version in NVIDIA Control Panel. Linux: nvidia-smi or check /proc/driver/nvidia/versionVerify Fix Applied:
Verify driver version matches or exceeds the patched version specified by NVIDIA📡 Detection & Monitoring
Log Indicators:
- Unusual kernel mode driver activity
- Suspicious DxgkDdiEscape or IOCTL calls
- Privilege escalation attempts
Network Indicators:
- Lateral movement from systems with vulnerable drivers
- Unusual outbound connections after local compromise
SIEM Query:
Search for events related to nvlddmkm.sys driver activity, privilege escalation, or unusual kernel API calls