CVE-2020-12362
📋 TL;DR
An integer overflow vulnerability in Intel Graphics Drivers for Windows and Linux kernel allows a privileged user to potentially escalate privileges via local access. This affects systems with vulnerable Intel graphics drivers before specific versions. Attackers could gain higher system privileges than intended.
💻 Affected Systems
- Intel Graphics Drivers for Windows
- Linux kernel
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level access, allowing installation of persistent malware, data theft, and disabling security controls.
Likely Case
Privilege escalation from a standard user to administrator/root, enabling lateral movement and persistence establishment.
If Mitigated
Limited impact if proper privilege separation and least privilege principles are enforced, though kernel access remains dangerous.
🎯 Exploit Status
Requires local access and privileged user context. Integer overflow vulnerabilities in kernel/driver space typically require specific conditions to trigger.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Windows: 26.20.100.7212 or later, Linux: kernel 5.5 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00438.html
Restart Required: Yes
Instructions:
1. For Windows: Update Intel Graphics Driver via Windows Update or download from Intel website. 2. For Linux: Update kernel to version 5.5 or later using distribution package manager. 3. Reboot system after update.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote local access to systems with vulnerable drivers
Apply principle of least privilege
allMinimize number of users with administrative/root privileges to reduce attack surface
🧯 If You Can't Patch
- Isolate affected systems from critical networks and data
- Implement strict access controls and monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Intel graphics driver version on Windows via Device Manager or 'dxdiag'. On Linux, check kernel version with 'uname -r'.Check Version:
Windows: 'wmic path win32_pnpentity get caption,driverVersion' | findstr /i intel, Linux: 'uname -r'Verify Fix Applied:
Confirm driver version is 26.20.100.7212 or higher on Windows, or kernel version is 5.5 or higher on Linux.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Driver/kernel module loading anomalies
- System crash dumps related to graphics drivers
Network Indicators:
- None - local exploitation only
SIEM Query:
EventID=4672 (Special privileges assigned) OR kernel/driver crash events from graphics components🔗 References
- https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00438.html
- https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00438.html
