CVE-2023-29495
📋 TL;DR
This vulnerability in Intel NUC BIOS firmware allows a privileged user with local access to potentially escalate privileges through improper input validation. It affects Intel NUC systems with BIOS firmware versions before IN0048. Attackers could gain higher system privileges than intended.
💻 Affected Systems
- Intel NUC systems
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative control, allowing installation of persistent malware, data theft, or disabling security controls.
Likely Case
Privileged attacker gains higher system privileges to bypass security controls, install unauthorized software, or access restricted data.
If Mitigated
Limited impact with proper access controls and monitoring; attacker may gain some additional privileges but not full system control.
🎯 Exploit Status
Requires local access and existing privileges. No public exploit code available at time of advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IN0048 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01009.html
Restart Required: Yes
Instructions:
1. Download BIOS update IN0048 or later from Intel support site. 2. Run the BIOS update utility. 3. Follow on-screen instructions. 4. System will restart automatically to complete update.
🔧 Temporary Workarounds
Restrict physical access
allLimit physical access to NUC systems to authorized personnel only
Implement least privilege
allEnsure users have only necessary privileges and monitor privileged account usage
🧯 If You Can't Patch
- Isolate affected NUC systems on separate network segments
- Implement strict access controls and monitoring for privileged accounts on these systems
🔍 How to Verify
Check if Vulnerable:
Check BIOS version in system BIOS/UEFI settings or using Intel System Support UtilityCheck Version:
For Windows: wmic bios get smbiosbiosversion. For Linux: sudo dmidecode -s bios-versionVerify Fix Applied:
Verify BIOS version shows IN0048 or later in system BIOS/UEFI settings📡 Detection & Monitoring
Log Indicators:
- Unusual BIOS/UEFI access attempts
- Privilege escalation events
- Unexpected system restarts
Network Indicators:
- Unusual outbound connections from NUC systems after local access
SIEM Query:
EventID=6005 (System startup) OR EventID=4624 (Successful logon) with privileged accounts on NUC systems