CVE-2025-33045
📋 TL;DR
This CVE describes vulnerabilities in APTIOV BIOS firmware where a privileged local user can write arbitrary data to memory locations and access sensitive information. Successful exploitation allows information disclosure and arbitrary data writing, affecting confidentiality, integrity, and availability. Systems using vulnerable APTIOV BIOS firmware are affected.
💻 Affected Systems
- Systems using APTIOV BIOS firmware
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to write to any memory location, disclose sensitive BIOS/firmware data, and potentially achieve persistent firmware-level access.
Likely Case
Privileged local user gains unauthorized access to sensitive BIOS/firmware information and can write to specific memory regions, potentially bypassing security controls.
If Mitigated
With proper access controls and monitoring, impact limited to authorized privileged users who already have significant system access.
🎯 Exploit Status
Requires local privileged access and BIOS/firmware knowledge; write-what-where condition suggests memory corruption vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor BIOS/firmware updates
Vendor Advisory: https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025007.pdf
Restart Required: Yes
Instructions:
1. Download BIOS/firmware update from hardware vendor. 2. Follow vendor-specific BIOS update procedures. 3. Reboot system to apply update.
🔧 Temporary Workarounds
Restrict local privileged access
allLimit number of users with local administrative/root privileges to reduce attack surface
Enable secure boot
allEnsure secure boot is enabled to verify firmware integrity
🧯 If You Can't Patch
- Implement strict access controls to limit local privileged users
- Monitor for unusual BIOS/firmware access attempts and privilege escalation
🔍 How to Verify
Check if Vulnerable:
Check BIOS version against vendor advisory; use manufacturer-specific tools to query BIOS informationCheck Version:
Manufacturer-specific (e.g., dmidecode -t bios on Linux, wmic bios get smbiosbiosversion on Windows)Verify Fix Applied:
Verify BIOS version has been updated to patched version; check vendor documentation for specific version numbers📡 Detection & Monitoring
Log Indicators:
- Unusual BIOS/firmware access attempts
- Privilege escalation events
- BIOS update logs
Network Indicators:
- Not applicable - local access required
SIEM Query:
Search for BIOS/firmware modification events or privilege escalation from standard to administrative accounts