CVE-2025-24851
📋 TL;DR
An uncaught exception in Intel E810 100GbE Ethernet controller firmware allows privileged local attackers to cause denial of service. This affects systems using these controllers with firmware before version cvl fw 1.7.8.x running on Bare Metal OS. The vulnerability requires local access and privileged user credentials.
💻 Affected Systems
- Intel Ethernet Controller E810 100GbE
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or unavailability of network services through the affected controller, requiring physical intervention to restore functionality.
Likely Case
Temporary disruption of network connectivity through the affected Ethernet controller, potentially requiring system reboot to restore normal operation.
If Mitigated
Minimal impact if proper access controls limit privileged user access and systems are monitored for unusual activity.
🎯 Exploit Status
Exploitation requires local privileged access. The advisory describes it as low complexity attack that doesn't require special internal knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: cvl fw 1.7.8.x 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's support site. 2. Follow Intel's firmware update procedures for the E810 controller. 3. Reboot the system to load the new firmware.
🔧 Temporary Workarounds
Restrict privileged access
allLimit local administrative access to systems with vulnerable firmware to trusted personnel only.
Network redundancy
allImplement redundant network paths using unaffected controllers to maintain connectivity if one controller fails.
🧯 If You Can't Patch
- Implement strict access controls to limit who has privileged access to affected systems
- Monitor systems for unusual activity and implement network redundancy to mitigate impact
🔍 How to Verify
Check if Vulnerable:
Check current firmware version using Intel's Ethernet diagnostic tools or system management utilities.Check Version:
Use Intel's 'ethtool -i <interface>' or system-specific firmware query toolsVerify Fix Applied:
Verify firmware version shows cvl fw 1.7.8.x or later after update.📡 Detection & Monitoring
Log Indicators:
- Unexpected system crashes
- Network interface failures
- Firmware exception logs
Network Indicators:
- Sudden loss of connectivity on affected interfaces
- Network traffic anomalies
SIEM Query:
Search for: (event_type:system_crash OR event_type:interface_down) AND (device_model:E810 OR firmware_version:<1.7.8)