CVE-2021-1059
📋 TL;DR
This vulnerability in NVIDIA vGPU manager allows attackers to cause integer overflow by providing unvalidated input indexes. Successful exploitation could lead to data tampering, information disclosure, or denial of service. It affects organizations using NVIDIA vGPU virtualization technology with vulnerable versions.
💻 Affected Systems
- NVIDIA vGPU manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the vGPU manager allowing data tampering across virtual machines, sensitive information disclosure, or persistent denial of service affecting all vGPU-enabled VMs.
Likely Case
Denial of service affecting vGPU functionality and potentially crashing the vGPU manager, disrupting virtual desktop infrastructure.
If Mitigated
Limited impact with proper network segmentation and access controls preventing unauthorized access to vGPU management interfaces.
🎯 Exploit Status
Exploitation requires access to vGPU management interface and understanding of vGPU plugin internals.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: vGPU version 8.6 or later, or version 11.3 or later
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5142
Restart Required: Yes
Instructions:
1. Download updated vGPU software from NVIDIA portal. 2. Stop all vGPU-enabled VMs. 3. Update vGPU manager on hypervisor hosts. 4. Restart hypervisor services. 5. Verify vGPU functionality.
🔧 Temporary Workarounds
Network segmentation
allRestrict access to vGPU management interfaces to authorized administrators only
Access controls
allImplement strict authentication and authorization for vGPU management access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vGPU management interfaces
- Monitor vGPU manager logs for unusual activity and implement intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check vGPU version: cat /proc/driver/nvidia/version or nvidia-smi -q | grep 'Driver Version'Check Version:
nvidia-smi -q | grep 'Driver Version'Verify Fix Applied:
Verify version is 8.6+ or 11.3+ and test vGPU functionality with sample workloads📡 Detection & Monitoring
Log Indicators:
- Unusual vGPU plugin access patterns
- vGPU manager crash logs
- Failed vGPU operations
Network Indicators:
- Unusual traffic to vGPU management ports (typically internal)
SIEM Query:
source="vGPU-manager" AND (event="crash" OR event="error" OR event="unexpected_input")