CVE-2022-26837
📋 TL;DR
This BIOS firmware vulnerability in certain Intel processors allows a privileged attacker with local access to potentially escalate privileges through improper input validation. It affects systems running vulnerable Intel processor BIOS firmware. Exploitation requires existing privileged access on the target system.
💻 Affected Systems
- Intel processors with vulnerable BIOS firmware
📦 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 bypassing of security controls.
Likely Case
Privileged attacker gains higher system privileges, potentially accessing sensitive data or installing backdoors within the same system.
If Mitigated
Limited impact due to existing security controls, with attacker confined to already compromised account scope.
🎯 Exploit Status
Exploitation requires BIOS-level access and deep system knowledge; no public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BIOS updates provided by system manufacturers
Vendor Advisory: http://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00717.html
Restart Required: Yes
Instructions:
1. Check Intel advisory for affected processor models. 2. Contact your system manufacturer for BIOS/UEFI firmware updates. 3. Apply BIOS update following manufacturer instructions. 4. Reboot system to complete installation.
🔧 Temporary Workarounds
Restrict physical and privileged access
allLimit who has physical access to systems and reduce number of privileged accounts
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles
- Monitor for unusual privileged account activity and BIOS/UEFI modifications
🔍 How to Verify
Check if Vulnerable:
Check system BIOS/UEFI version against Intel's affected list in SA-00717 advisoryCheck Version:
Windows: wmic bios get smbiosbiosversion | Linux: dmidecode -s bios-version | macOS: system_profiler SPHardwareDataType | grep "Boot ROM Version"Verify Fix Applied:
Verify BIOS/UEFI version has been updated to manufacturer's patched version📡 Detection & Monitoring
Log Indicators:
- BIOS/UEFI firmware modification events
- Unusual privileged account activity
- Failed BIOS update attempts
Network Indicators:
- Not applicable - local exploit only
SIEM Query:
EventID=12 OR EventID=13 (System events for BIOS/UEFI changes on Windows) OR kernel logs showing firmware access attempts