CVE-2025-20082
📋 TL;DR
A time-of-check time-of-use race condition vulnerability in the UEFI firmware SmiVariable driver for specific Intel server boards allows a privileged user to escalate privileges via local access. This affects users of Intel Server D50DNP and M50FCP boards with vulnerable firmware. Attackers could gain higher system privileges than intended.
💻 Affected Systems
- Intel Server D50DNP
- Intel Server M50FCP
⚠️ 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
Complete system compromise with attacker gaining firmware-level control, potentially installing persistent malware or bricking the system.
Likely Case
Privileged user escalates to higher system privileges, potentially accessing sensitive data or modifying system configurations.
If Mitigated
Limited impact if proper access controls and monitoring are in place, with attackers unable to reach vulnerable components.
🎯 Exploit Status
Requires local access and privileged user credentials. Race condition exploitation requires precise timing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates specified in Intel-SA-01269
Vendor Advisory: https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01269.html
Restart Required: Yes
Instructions:
1. Download firmware update from Intel support site. 2. Follow Intel's firmware update procedure for affected server boards. 3. Reboot system to apply firmware update.
🔧 Temporary Workarounds
Restrict privileged access
allLimit local administrative access to affected systems to reduce attack surface
Implement strict access controls
allEnforce principle of least privilege and monitor privileged user activities
🧯 If You Can't Patch
- Isolate affected systems in secure network segments
- Implement enhanced monitoring for privileged user activities on affected systems
🔍 How to Verify
Check if Vulnerable:
Check firmware version on Intel Server D50DNP or M50FCP boards against vulnerable versions in Intel advisoryCheck Version:
System-specific firmware check commands (varies by platform) or check in BIOS/UEFI settingsVerify Fix Applied:
Verify firmware version has been updated to patched version specified in Intel advisory📡 Detection & Monitoring
Log Indicators:
- Unusual firmware access attempts
- Privilege escalation events
- Unexpected system reboots or firmware modifications
Network Indicators:
- Local system access patterns consistent with privilege escalation attempts
SIEM Query:
Search for events related to firmware access, privilege escalation, or unauthorized system modifications on affected server models