CVE-2021-22794
📋 TL;DR
This path traversal vulnerability in StruxureWare Data Center Expert allows attackers to access files outside the intended directory, potentially leading to remote code execution. It affects Data Center Expert versions 7.8.1 and earlier. Organizations using this data center infrastructure management software are at risk.
💻 Affected Systems
- StruxureWare Data Center Expert
📦 What is this software?
Struxureware Data Center Expert by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining administrative control over the Data Center Expert server, potentially accessing sensitive infrastructure data and executing arbitrary commands.
Likely Case
Unauthorized file access leading to information disclosure of configuration files, credentials, or sensitive infrastructure data.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Path traversal vulnerabilities typically have low exploitation complexity. The advisory suggests remote code execution is possible, indicating significant impact potential.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.9.0 or later
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2021-257-03/
Restart Required: Yes
Instructions:
1. Download Data Center Expert version 7.9.0 or later from Schneider Electric portal. 2. Backup current configuration and data. 3. Install the updated version following vendor documentation. 4. Restart the Data Center Expert service.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Data Center Expert server from untrusted networks and internet
Access Control Restrictions
allImplement strict firewall rules to limit access to Data Center Expert web interface
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the Data Center Expert server from untrusted networks
- Deploy web application firewall (WAF) with path traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Check Data Center Expert version in web interface or installation directory. Versions 7.8.1 and earlier are vulnerable.Check Version:
Check web interface login page or application properties file for version informationVerify Fix Applied:
Verify installation of version 7.9.0 or later through the web interface or application properties.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in web server logs
- Multiple failed path traversal attempts
- Access to files outside normal web directory
Network Indicators:
- HTTP requests containing '../' sequences or directory traversal patterns
- Unusual outbound connections from Data Center Expert server
SIEM Query:
web_access_logs AND (url CONTAINS "../" OR url CONTAINS "..\" OR url CONTAINS "%2e%2e%2f")