CVE-2025-3112
📋 TL;DR
This vulnerability allows an authenticated attacker to cause a denial of service by sending manipulated HTTPS Content-Length headers to the webserver, leading to uncontrolled resource consumption. It affects Schneider Electric products running vulnerable web server software.
💻 Affected Systems
- Schneider Electric products with vulnerable web server components
⚠️ 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 service outage of affected web servers, potentially disrupting critical operations in industrial environments.
Likely Case
Temporary service degradation or unavailability of web interfaces until resource consumption normalizes.
If Mitigated
Minimal impact with proper network segmentation and authentication controls limiting attack surface.
🎯 Exploit Status
Exploitation requires authenticated access but involves simple manipulation of HTTP headers.
🛠️ 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-2025-161-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2025-161-02.pdf
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected products. 2. Download and apply recommended patches from Schneider Electric. 3. Restart affected systems as required. 4. Verify patch application.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to web interfaces to trusted networks only
Authentication Hardening
allImplement strong authentication controls and monitor for suspicious login attempts
🧯 If You Can't Patch
- Implement network access controls to limit web interface access to essential personnel only
- Deploy web application firewall (WAF) rules to block malformed Content-Length headers
🔍 How to Verify
Check if Vulnerable:
Check product version against vendor advisory; test with controlled Content-Length manipulation if authorizedCheck Version:
Product-specific; consult Schneider Electric documentation for version query commandsVerify Fix Applied:
Verify patch version installation and test that malformed Content-Length headers no longer cause resource exhaustion📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by unusual Content-Length values in HTTP logs
- Resource exhaustion alerts from system monitoring
Network Indicators:
- Unusually large Content-Length headers in HTTPS traffic to affected systems
SIEM Query:
source="web_logs" AND (Content-Length > 1000000 OR Content-Length < 0) AND dest_ip IN [affected_systems]