CVE-2023-39941
📋 TL;DR
An improper access control vulnerability in Intel SUR software allows unauthenticated attackers on the same network segment to potentially cause denial of service. This affects organizations using vulnerable versions of Intel SUR software for system management and monitoring. The vulnerability requires adjacent network access but no authentication.
💻 Affected Systems
- Intel(R) SUR software
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of affected Intel SUR management systems, potentially impacting managed devices and monitoring capabilities across the network.
Likely Case
Temporary service degradation or crashes of Intel SUR software components, requiring system restarts to restore functionality.
If Mitigated
Minimal impact with proper network segmentation and access controls preventing adjacent network access from untrusted sources.
🎯 Exploit Status
No authentication required, but requires network adjacency. Exploit details not publicly disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.10587
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00998.html
Restart Required: Yes
Instructions:
1. Download Intel SUR version 2.4.10587 or later from Intel's official website. 2. Stop all Intel SUR services. 3. Install the updated version. 4. Restart the system to ensure all components are updated.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Intel SUR management systems on separate VLANs or network segments to prevent adjacent access from untrusted devices.
Firewall Restrictions
allImplement firewall rules to restrict access to Intel SUR services only from authorized management systems.
🧯 If You Can't Patch
- Implement strict network access controls to limit which devices can communicate with Intel SUR systems
- Monitor Intel SUR service health and logs for signs of disruption or unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check Intel SUR software version via the application interface or by examining installed programs list. Versions below 2.4.10587 are vulnerable.Check Version:
On Windows: Check Programs and Features. On Linux: Check package manager or run 'intel-sur --version' if available.Verify Fix Applied:
Confirm Intel SUR version is 2.4.10587 or higher and verify services are running normally without crashes.📡 Detection & Monitoring
Log Indicators:
- Unexpected service crashes or restarts of Intel SUR components
- Unauthorized connection attempts to Intel SUR services from adjacent network addresses
Network Indicators:
- Unusual traffic patterns to Intel SUR service ports (default varies by configuration)
- Connection attempts from unexpected internal IP addresses
SIEM Query:
source="intel-sur" AND (event_type="crash" OR event_type="service_stop") OR dest_port IN (Intel_SUR_ports) AND src_ip NOT IN (authorized_management_ips)