CVE-2023-39537
📋 TL;DR
This vulnerability in AMI AptioV BIOS allows attackers on the local network to exploit improper input validation, potentially compromising system confidentiality, integrity, and availability. It affects systems using vulnerable AMI BIOS firmware versions. Attackers could gain unauthorized access or disrupt system operations.
💻 Affected Systems
- AMI AptioV BIOS
📦 What is this 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
Complete system compromise allowing attacker to execute arbitrary code at BIOS level, potentially persisting across reboots and OS reinstalls, leading to data theft, system destruction, or establishing persistent foothold.
Likely Case
Attacker gains elevated privileges or executes code in BIOS context, potentially bypassing OS security controls, accessing sensitive firmware data, or disrupting system boot process.
If Mitigated
With proper network segmentation and access controls, risk is limited to authorized internal users; impact reduced to denial of service or limited information disclosure.
🎯 Exploit Status
Exploitation requires local network access but no authentication; specific exploit details not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with system/OEM vendor for specific BIOS updates
Vendor Advisory: https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/AMI-SA-2023008.pdf
Restart Required: Yes
Instructions:
1. Contact system/OEM manufacturer for BIOS update 2. Download appropriate BIOS firmware 3. Follow manufacturer's flashing instructions 4. Reboot system to apply update
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to BIOS management interfaces to trusted management networks only
Access Control Lists
allImplement network ACLs to limit which systems can communicate with BIOS management interfaces
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BIOS management interfaces
- Monitor network traffic to/from BIOS management interfaces for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check BIOS version against vendor's vulnerability list; run 'wmic bios get smbiosbiosversion' on Windows or 'dmidecode -t bios' on LinuxCheck Version:
Windows: wmic bios get smbiosbiosversion | Linux: dmidecode -t bios | grep VersionVerify Fix Applied:
Verify BIOS version has been updated to patched version; check vendor documentation for fixed versions📡 Detection & Monitoring
Log Indicators:
- Unusual BIOS/UEFI access attempts
- Failed BIOS update attempts
- Unexpected system reboots
Network Indicators:
- Unusual traffic to BIOS management ports
- Network scans targeting BIOS interfaces
SIEM Query:
source="bios_logs" AND (event_type="access_denied" OR event_type="update_attempt")