CVE-2025-27535
📋 TL;DR
An exposed ioctl interface with insufficient access control in Intel Ethernet Connection E825-C firmware allows local attackers with privileged access to potentially cause denial of service. This affects systems using affected firmware versions in bare metal OS environments. Attack complexity is high, requiring privileged local access.
💻 Affected Systems
- Intel(R) Ethernet Connection E825-C
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system denial of service via local privileged attacker, disrupting network connectivity and potentially system stability.
Likely Case
Local administrator or compromised privileged account could disrupt network operations of affected interface.
If Mitigated
With proper access controls and updated firmware, risk is minimal to non-existent.
🎯 Exploit Status
Requires privileged local access and high complexity attack. No public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: NVM firmware version 3.84 or later
Vendor Advisory: https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01171.html
Restart Required: Yes
Instructions:
1. Download updated firmware from Intel support site. 2. Follow Intel firmware update procedures for E825-C. 3. Reboot system after firmware update.
🔧 Temporary Workarounds
Restrict local privileged access
allLimit local administrative access to systems with affected firmware
🧯 If You Can't Patch
- Implement strict access controls to limit local privileged access to affected systems
- Monitor systems for unusual local privileged activity and network disruption events
🔍 How to Verify
Check if Vulnerable:
Check current NVM firmware version using Intel NIC diagnostic tools or system management utilitiesCheck Version:
Platform dependent - use Intel Ethernet diagnostic tools or check system firmware/bios settingsVerify Fix Applied:
Verify firmware version is 3.84 or later using same diagnostic tools📡 Detection & Monitoring
Log Indicators:
- Unusual local privileged access attempts
- Network interface disruption events
- Firmware access logs showing ioctl operations
Network Indicators:
- Sudden loss of network connectivity on affected interface
- Interface reset events
SIEM Query:
Search for: (event_type="privileged_access" OR "local_admin") AND (device="E825-C" OR "Intel_Ethernet")