CVE-2023-6138
📋 TL;DR
A BIOS vulnerability in certain HP Workstation PCs could allow attackers with physical or local access to execute arbitrary code, escalate privileges, or cause denial of service. This affects specific HP workstation models with vulnerable BIOS versions. Attackers need local or physical access to exploit this vulnerability.
💻 Affected Systems
- HP Z2 Mini G9 Workstation
- HP Z2 Small Form Factor G9 Workstation
- HP Z2 Tower G9 Workstation
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with persistent BIOS-level malware that survives OS reinstallation, allowing attackers to maintain control even after security measures are applied.
Likely Case
Local privilege escalation allowing attackers to bypass security controls and gain administrative access to the system.
If Mitigated
Limited impact with proper physical security controls and BIOS password protection in place.
🎯 Exploit Status
Exploitation requires local access to the system. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BIOS version 02.07.10 Rev.A or later
Vendor Advisory: https://support.hp.com/us-en/document/ish_10167884-10167908-16/hpsbhf03915
Restart Required: Yes
Instructions:
1. Download BIOS update from HP Support site. 2. Run the BIOS update executable. 3. Follow on-screen instructions. 4. System will restart automatically to complete update.
🔧 Temporary Workarounds
Enable BIOS Password
allSet a BIOS administrator password to prevent unauthorized BIOS modifications
Access BIOS setup during boot (typically F10), navigate to Security settings, set Administrator Password
Physical Security Controls
allImplement physical security measures to prevent unauthorized physical access to workstations
🧯 If You Can't Patch
- Implement strict physical security controls for affected workstations
- Enable BIOS password protection and restrict BIOS access to authorized personnel only
🔍 How to Verify
Check if Vulnerable:
Check BIOS version in System Information (Windows: msinfo32, Linux: dmidecode -t bios) and compare with vulnerable versionsCheck Version:
Windows: wmic bios get smbiosbiosversion | Linux: sudo dmidecode -s bios-versionVerify Fix Applied:
Verify BIOS version is 02.07.10 Rev.A or later using same methods📡 Detection & Monitoring
Log Indicators:
- Unexpected BIOS update attempts
- Failed BIOS password attempts
- System boot logs showing BIOS modifications
Network Indicators:
- Not applicable - local exploit only
SIEM Query:
EventID=12 OR EventID=13 (System boot events) combined with suspicious user activity patterns