CVE-2024-41796
📋 TL;DR
This vulnerability allows unauthenticated attackers to change the login password on SENTRON 7KT PAC1260 Data Manager devices without knowing the current password. When combined with a CSRF attack (CVE-2024-41795), attackers can set passwords to values they control. All versions of this industrial energy management device are affected.
💻 Affected Systems
- SENTRON 7KT PAC1260 Data Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to manipulation of energy monitoring data, disruption of industrial processes, or use as a foothold into industrial control networks.
Likely Case
Unauthorized access to device configuration and energy data, potential for data manipulation or service disruption.
If Mitigated
Limited impact if devices are isolated from untrusted networks and CSRF protections are implemented.
🎯 Exploit Status
Exploitation requires combining with CSRF (CVE-2024-41795) for full impact. Simple HTTP requests can trigger the password change.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Siemens advisory for specific firmware updates
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-187636.html
Restart Required: Yes
Instructions:
1. Check Siemens advisory SSA-187636 for firmware updates. 2. Download appropriate firmware from Siemens support portal. 3. Apply firmware update following device documentation. 4. Restart device to activate changes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SENTRON devices from untrusted networks and internet access
CSRF Protection
allImplement anti-CSRF tokens or same-origin policies for web applications accessing the device
🧯 If You Can't Patch
- Segment devices on isolated VLANs with strict firewall rules
- Implement network monitoring for unauthorized password change attempts
🔍 How to Verify
Check if Vulnerable:
Test if password can be changed via web interface without current password. Check device firmware version against Siemens advisory.Check Version:
Check device web interface or use Siemens configuration tools to query firmware versionVerify Fix Applied:
Verify firmware version matches patched version from Siemens advisory. Test that password change now requires current password.📡 Detection & Monitoring
Log Indicators:
- Unusual password change events
- Failed authentication attempts followed by password changes
- Access from unexpected IP addresses
Network Indicators:
- HTTP POST requests to password change endpoints without authentication
- CSRF-like request patterns to device management interface
SIEM Query:
source="sentron_device" AND (event_type="password_change" OR uri="/password/change")