CVE-2023-39433
📋 TL;DR
This vulnerability in Intel CST software allows authenticated local users to potentially escalate privileges due to improper access control. It affects systems running vulnerable versions of Intel CST software. The impact is limited to authenticated users with local access to the system.
💻 Affected Systems
- Intel(R) Converged Security and Manageability Engine (CSME) CST software
⚠️ 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 authenticated attacker could gain elevated privileges, potentially compromising the entire system or accessing sensitive data.
Likely Case
An authenticated user with malicious intent could gain administrative privileges on their own workstation.
If Mitigated
With proper access controls and least privilege principles, impact would be limited even if exploited.
🎯 Exploit Status
Requires authenticated local access and knowledge of the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.10300 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01021.html
Restart Required: Yes
Instructions:
1. Download latest Intel CSME firmware update from Intel website. 2. Apply firmware update following manufacturer instructions. 3. Reboot system to complete installation.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local access to systems with vulnerable CST software to trusted users only.
Implement Least Privilege
allEnsure users only have necessary privileges and cannot run arbitrary local processes.
🧯 If You Can't Patch
- Implement strict access controls and monitor for privilege escalation attempts.
- Isolate affected systems from critical network segments and sensitive data.
🔍 How to Verify
Check if Vulnerable:
Check Intel CSME firmware version in system BIOS/UEFI settings or using Intel-provided diagnostic tools.Check Version:
On Windows: wmic csproduct get version (may show CSME version) or use Intel System Support UtilityVerify Fix Applied:
Verify CSME firmware version is 2.1.10300 or later after applying update.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Unauthorized access to system files or processes
Network Indicators:
- None - local vulnerability only
SIEM Query:
EventID=4688 OR EventID=4672 (Windows) showing unexpected privilege changes from local users