CVE-2023-40067
📋 TL;DR
This vulnerability in Intel CSME firmware allows an attacker with physical access to potentially escalate privileges by exploiting an unchecked return value. It affects systems with vulnerable Intel Converged Security and Management Engine firmware. The attack requires physical access to the device.
💻 Affected Systems
- Intel Converged Security and Management Engine (CSME)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
An attacker with physical access could gain elevated system privileges, potentially compromising the entire system's security and accessing protected data.
Likely Case
Limited to attackers with physical device access who could gain higher privileges than intended, but full system compromise depends on other factors.
If Mitigated
With proper physical security controls, the risk is minimal as physical access is required for exploitation.
🎯 Exploit Status
Exploitation requires physical access and knowledge of the vulnerability; no public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Intel SA-00999 for specific patched firmware versions
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00999.html
Restart Required: Yes
Instructions:
1. Check Intel SA-00999 advisory for affected systems. 2. Obtain updated firmware from system manufacturer or Intel. 3. Apply firmware update following manufacturer instructions. 4. Reboot system to activate patched firmware.
🔧 Temporary Workarounds
Physical Security Controls
allImplement strict physical access controls to prevent unauthorized physical access to devices.
Device Encryption
allEnable full disk encryption to protect data even if physical access is obtained.
🧯 If You Can't Patch
- Enhance physical security measures to restrict device access
- Implement device tracking and remote wipe capabilities for mobile devices
🔍 How to Verify
Check if Vulnerable:
Check system BIOS/UEFI firmware version against Intel's advisory or use Intel's detection tools if available.Check Version:
On Windows: wmic bios get smbiosbiosversion
On Linux: dmidecode -t biosVerify Fix Applied:
Verify firmware version has been updated to patched version listed in Intel SA-00999.📡 Detection & Monitoring
Log Indicators:
- Unusual physical access events
- Firmware modification attempts in system logs
Network Indicators:
- None - not network exploitable
SIEM Query:
Search for firmware update events or unauthorized physical access alerts