CVE-2020-7569
📋 TL;DR
This vulnerability allows authenticated remote attackers to upload arbitrary files to EcoStruxure Building Operation WebReports servers, potentially leading to remote code execution. It affects versions 1.9 through 3.1 of the software. Organizations using these versions for building management systems are at risk.
💻 Affected Systems
- EcoStruxure Building Operation WebReports
📦 What is this software?
Webreports by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary code, steal sensitive building control data, pivot to other systems, or disrupt building operations.
Likely Case
Attackers upload malicious files to gain persistent access, install backdoors, or exfiltrate building management data.
If Mitigated
With proper authentication controls and network segmentation, impact limited to the WebReports application instance.
🎯 Exploit Status
Exploitation requires valid credentials but is straightforward once authenticated. File upload vulnerabilities are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.2 and later
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2020-315-04/
Restart Required: Yes
Instructions:
1. Download and install EcoStruxure Building Operation WebReports version 3.2 or later from Schneider Electric's official portal. 2. Apply the update to all affected servers. 3. Restart the WebReports service and verify functionality.
🔧 Temporary Workarounds
Restrict File Upload Types
windowsConfigure the application to only accept specific safe file extensions if the application allows such configuration.
Network Segmentation
allIsolate WebReports servers from critical building control networks and restrict access to authenticated users only.
🧯 If You Can't Patch
- Implement strict access controls and multi-factor authentication for all WebReports users.
- Deploy web application firewalls (WAF) with file upload filtering rules and monitor for suspicious upload attempts.
🔍 How to Verify
Check if Vulnerable:
Check the WebReports version in the application interface or configuration files. Versions between 1.9 and 3.1 inclusive are vulnerable.Check Version:
Check the application's admin interface or review installation logs for version information.Verify Fix Applied:
Confirm the installed version is 3.2 or later and test that file upload functionality properly validates file types.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to WebReports directories
- Execution of unexpected files from WebReports paths
- Authentication logs showing successful logins followed by file upload activities
Network Indicators:
- HTTP POST requests with file uploads to WebReports endpoints containing unusual file extensions
- Outbound connections from WebReports servers to unknown external IPs
SIEM Query:
source="web_reports_logs" AND (event="file_upload" AND file_extension NOT IN ("pdf","csv","xlsx")) OR process_execution FROM "C:\Program Files\EcoStruxure\WebReports\"