CVE-2022-28699
📋 TL;DR
This vulnerability in Intel NUC BIOS firmware allows a privileged user with local access to potentially escalate privileges through improper input validation. Attackers could gain higher system privileges than intended. This affects systems running vulnerable Intel NUC BIOS firmware versions.
💻 Affected Systems
- Intel NUC systems with vulnerable BIOS firmware
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local privileged access could gain full system control, potentially compromising the entire system and accessing sensitive data.
Likely Case
A malicious insider or compromised privileged account could elevate privileges to gain unauthorized access to system resources.
If Mitigated
With proper access controls and BIOS updates, the risk is significantly reduced to minimal impact.
🎯 Exploit Status
Exploitation requires local privileged access and knowledge of the vulnerability. No public exploit code has been reported.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BIOS updates specified in Intel advisory SA-00777
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00777.html
Restart Required: Yes
Instructions:
1. Identify your Intel NUC model. 2. Visit Intel's support site. 3. Download the BIOS update for your specific model. 4. Follow Intel's BIOS update instructions. 5. Restart the system after update completion.
🔧 Temporary Workarounds
Restrict local privileged access
allLimit the number of users with local administrative privileges to reduce attack surface.
Implement least privilege access controls
allEnsure users only have the minimum necessary privileges for their roles.
🧯 If You Can't Patch
- Isolate affected systems from critical networks and sensitive data
- Implement strict monitoring and logging of privileged user activities
🔍 How to Verify
Check if Vulnerable:
Check BIOS version in system settings or using Intel's system identification tools and compare with affected versions in Intel advisory SA-00777.Check Version:
System-specific: Check BIOS version in UEFI/BIOS setup or use manufacturer-specific toolsVerify Fix Applied:
Verify BIOS version after update matches the patched version specified in Intel's advisory.📡 Detection & Monitoring
Log Indicators:
- Unusual BIOS/UEFI access attempts
- Multiple failed privilege escalation attempts
- Unauthorized changes to system firmware settings
Network Indicators:
- Local system activity patterns suggesting privilege escalation attempts
SIEM Query:
Search for events related to BIOS/UEFI access, privilege escalation attempts, or firmware modification on Intel NUC systems