CVE-2024-9876
📋 TL;DR
A Modification of Assumed-Immutable Data (MAID) vulnerability in ABB ANC, ANC-L, and ANC-mini devices allows attackers to modify data that should be protected. This affects all versions through 1.1.4 of these industrial automation controllers. Attackers could potentially manipulate configuration or operational data.
💻 Affected Systems
- ABB ANC
- ABB ANC-L
- ABB ANC-mini
⚠️ 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 compromise of industrial control systems leading to operational disruption, safety hazards, or data manipulation affecting physical processes.
Likely Case
Unauthorized modification of configuration settings leading to operational issues or data integrity problems.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Exploitation requires network access to the device and knowledge of the data structures.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.1.4
Vendor Advisory: https://search.abb.com/library/Download.aspx?DocumentID=2CRT000006&LanguageCode=en&DocumentPartId=PDF&Action=Launch
Restart Required: Yes
Instructions:
1. Download updated firmware from ABB support portal. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Restart device. 5. Restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and limit access to authorized personnel only.
Access Control Lists
allImplement strict network access controls to limit communication with affected devices.
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to isolate devices
- Monitor network traffic to/from affected devices for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If version is 1.1.4 or earlier, device is vulnerable.Check Version:
Check via device web interface or consult device documentation for version query command.Verify Fix Applied:
Verify firmware version is greater than 1.1.4 after applying update.📡 Detection & Monitoring
Log Indicators:
- Unauthorized configuration changes
- Unexpected firmware modification attempts
- Access from unauthorized IP addresses
Network Indicators:
- Unusual data modification traffic to device ports
- Traffic patterns inconsistent with normal operations
SIEM Query:
source_ip NOT IN (authorized_ips) AND dest_ip IN (device_ips) AND (port=80 OR port=443 OR port=502)