CVE-2024-5560
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Schneider Electric devices that allows attackers to cause denial of service of the web interface by sending specially crafted HTTP requests. The vulnerability affects Schneider Electric products with vulnerable web interfaces, potentially impacting industrial control systems and critical infrastructure.
💻 Affected Systems
- Schneider Electric products with vulnerable web interfaces (specific products not detailed in provided references)
📦 What is this software?
Sage Rtu Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of the device's web management interface, requiring physical access to restore functionality, potentially disrupting industrial operations.
Likely Case
Temporary denial of service of the web interface, requiring device restart to restore web management capabilities.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting HTTP requests to trusted sources only.
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the web interface, which is typically unauthenticated for basic requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to vendor advisory for specific fixed versions
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-163-05&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-163-05.pdf
Restart Required: Yes
Instructions:
1. Download the security patch from Schneider Electric's website. 2. Apply the patch according to vendor instructions. 3. Restart the device to apply changes. 4. Verify the web interface functions normally.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to device web interfaces using firewall rules or network segmentation
Disable Web Interface
allTemporarily disable the web interface if not required for operations
🧯 If You Can't Patch
- Implement strict network access controls to limit HTTP traffic to trusted IP addresses only
- Monitor web interface logs for unusual HTTP request patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check device version against vendor advisory and test with controlled HTTP request patternsCheck Version:
Check device web interface or console for firmware version informationVerify Fix Applied:
Verify device version matches patched version in vendor advisory and test web interface functionality📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP request patterns to web interface
- Web interface crash or restart logs
- Multiple malformed HTTP requests from single source
Network Indicators:
- Spike in HTTP traffic to device web interface
- HTTP requests with unusual headers or parameters
SIEM Query:
source_ip="device_ip" AND (http_request CONTAINS "malformed" OR http_status="500")