CVE-2022-25754
📋 TL;DR
This is a Cross-Site Request Forgery (CSRF) vulnerability in Siemens SCALANCE industrial network switches. Attackers can trick authenticated users into executing unauthorized actions on the device's web interface. All listed SCALANCE X300 and XR300 series switches with active web sessions are affected.
💻 Affected Systems
- SCALANCE X302-7 EEC
- SCALANCE X304-2FE
- SCALANCE X306-1LD FE
- SCALANCE X307-2 EEC
- SCALANCE X307-3
- SCALANCE X307-3LD
- SCALANCE X308-2
- SCALANCE X308-2LD
- SCALANCE X308-2LH
- SCALANCE X308-2LH+
- SCALANCE X308-2M
- SCALANCE X308-2M PoE
- SCALANCE X308-2M TS
- SCALANCE X310
- SCALANCE X310FE
- SCALANCE X320-1 FE
- SCALANCE X320-1-2LD FE
- SCALANCE X408-2
- SCALANCE XR324-12M
- SCALANCE XR324-12M TS
- SCALANCE XR324-4M EEC
- SCALANCE XR324-4M PoE
- SIPLUS NET SCALANCE X308-2
📦 What is this software?
Scalance Xr324 4m Poe Ts Firmware by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to reconfigure network settings, disrupt industrial operations, or use the device as an entry point to other systems.
Likely Case
Unauthorized configuration changes leading to network disruption, data interception, or denial of service in industrial environments.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and CSRF protections are implemented.
🎯 Exploit Status
CSRF attacks are well-understood and easy to implement. Requires victim to have active session and visit malicious site.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Siemens advisory for specific firmware versions
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-836527.pdf
Restart Required: Yes
Instructions:
1. Download latest firmware from Siemens Industrial Security. 2. Backup current configuration. 3. Upload firmware via web interface or TFTP. 4. Reboot device. 5. Verify firmware version and restore configuration if needed.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd anti-CSRF tokens to web interface requests
Not applicable - requires code changes
Network Segmentation
allIsolate SCALANCE devices in separate VLANs with strict firewall rules
Not applicable - network configuration required
🧯 If You Can't Patch
- Restrict web interface access to trusted IP addresses only
- Implement strict session timeouts and require re-authentication for sensitive actions
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface: System > Device Information > Firmware VersionCheck Version:
Not applicable - use web interface or SNMPVerify Fix Applied:
Verify firmware version matches patched version from Siemens advisory📡 Detection & Monitoring
Log Indicators:
- Multiple configuration changes from same session
- Unexpected configuration modifications
- Failed authentication attempts followed by successful requests
Network Indicators:
- HTTP requests to device web interface from unexpected sources
- Patterns of requests matching CSRF attack structures
SIEM Query:
source_ip=external AND dest_ip=scalance_device AND http_method=POST AND NOT user_agent=expected_browser