CVE-2020-29020
📋 TL;DR
This vulnerability allows remote attackers to access the Secomea SiteManager web UI from the internet using configured credentials due to improper access control. It affects all SiteManager hardware versions prior to 9.4.620527004, potentially exposing management interfaces to unauthorized external access.
💻 Affected Systems
- Secomea SiteManager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of SiteManager devices allowing attackers to reconfigure industrial networks, disrupt operations, or pivot to internal systems.
Likely Case
Unauthorized access to management interface leading to configuration changes, data exposure, or denial of service.
If Mitigated
Limited impact if proper network segmentation and access controls prevent internet exposure.
🎯 Exploit Status
Exploitation requires knowledge of valid credentials but access control bypass allows internet-based attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.4.620527004
Vendor Advisory: https://www.secomea.com/support/cybersecurity-advisory/#3217
Restart Required: Yes
Instructions:
1. Download firmware version 9.4.620527004 from Secomea support portal. 2. Backup current configuration. 3. Upload and install new firmware via web UI. 4. Reboot device. 5. Restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SiteManager devices from internet access using firewalls or network segmentation.
Access Control Lists
allImplement strict source IP restrictions to limit web UI access to trusted networks only.
🧯 If You Can't Patch
- Implement network-level access controls to block all internet traffic to SiteManager web ports (typically 80/443).
- Change all default credentials and implement strong password policies for all user accounts.
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web UI under System > About. If version is below 9.4.620527004, device is vulnerable.Check Version:
Not applicable - check via web UI or device console.Verify Fix Applied:
Confirm firmware version shows 9.4.620527004 or higher in System > About page.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts from external IPs
- Successful logins from unexpected IP ranges
- Configuration changes from unauthorized sources
Network Indicators:
- External connections to SiteManager web ports (80/443)
- Unusual traffic patterns to industrial control network
SIEM Query:
source_ip IN (external_ips) AND dest_port IN (80,443) AND dest_ip IN (sitemanager_ips)