CVE-2024-11999
📋 TL;DR
This vulnerability allows authenticated users to install malicious code on Schneider Electric HMI products through unmaintained third-party components, leading to complete device compromise. It affects organizations using vulnerable Schneider Electric HMI systems with authenticated user access.
💻 Affected Systems
- Schneider Electric HMI products (specific models not detailed in provided reference)
⚠️ 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 device takeover allowing attackers to disrupt industrial processes, steal sensitive data, or pivot to other industrial control systems.
Likely Case
Malicious actors with legitimate credentials install backdoors or malware to maintain persistent access for espionage or future attacks.
If Mitigated
Limited impact if strong authentication controls, network segmentation, and monitoring prevent unauthorized code installation.
🎯 Exploit Status
Exploitation requires authenticated access but appears straightforward once credentials are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-345-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-345-02.pdf
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected products. 2. Download and apply vendor-provided patches. 3. Restart affected HMI devices. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict HMI Access
allLimit network access to HMI devices to only authorized users and systems
Strengthen Authentication
allImplement multi-factor authentication and strong password policies for HMI access
🧯 If You Can't Patch
- Isolate HMI devices in separate network segments with strict firewall rules
- Implement application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against vendor advisory. Review installed third-party components.Check Version:
Check via HMI device interface or vendor-specific management toolsVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory. Test authentication and code installation controls.📡 Detection & Monitoring
Log Indicators:
- Unauthorized code installation attempts
- Unusual authentication patterns
- Unexpected process execution
Network Indicators:
- Unusual outbound connections from HMI devices
- Unexpected file transfers to/from HMI
SIEM Query:
source="hmi_device" AND (event="code_install" OR event="process_execution")