CVE-2024-22041
📋 TL;DR
A memory buffer handling vulnerability in the network communication library of Siemens Cerberus and related fire safety systems allows unauthenticated remote attackers to crash network services by sending specially crafted X.509 certificates. This affects multiple fire panels, engineering tools, and cloud distribution systems across Siemens' fire safety product lines. The vulnerability could disrupt critical fire safety monitoring and control functions.
💻 Affected Systems
- Cerberus PRO EN Engineering Tool
- Cerberus PRO EN Fire Panel FC72x IP6
- Cerberus PRO EN Fire Panel FC72x IP7
- Cerberus PRO EN Fire Panel FC72x IP8
- Cerberus PRO EN X200 Cloud Distribution IP7
- Cerberus PRO EN X200 Cloud Distribution IP8
- Cerberus PRO EN X300 Cloud Distribution IP7
- Cerberus PRO EN X300 Cloud Distribution IP8
- Cerberus PRO UL Compact Panel FC922/924
- Cerberus PRO UL Engineering Tool
- Cerberus PRO UL X300 Cloud Distribution
- Desigo Fire Safety UL Compact Panel FC2025/2050
- Desigo Fire Safety UL Engineering Tool
- Desigo Fire Safety UL X300 Cloud Distribution
- Sinteso FS20 EN Engineering Tool
- Sinteso FS20 EN Fire Panel FC20 MP6
- Sinteso FS20 EN Fire Panel FC20 MP7
- Sinteso FS20 EN Fire Panel FC20 MP8
- Sinteso FS20 EN X200 Cloud Distribution MP7
- Sinteso FS20 EN X200 Cloud Distribution MP8
- Sinteso FS20 EN X300 Cloud Distribution MP7
- Sinteso FS20 EN X300 Cloud Distribution MP8
- Sinteso Mobile
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service for fire safety systems, preventing fire detection, alarm notification, and emergency response coordination during an actual fire event.
Likely Case
Service disruption causing temporary loss of monitoring capabilities, requiring manual intervention and system restart.
If Mitigated
Isolated service interruption on non-critical components with redundant systems maintaining overall fire safety functionality.
🎯 Exploit Status
The vulnerability requires network access to affected services but no authentication. Crafting malicious X.509 certificates is relatively straightforward for attackers with basic cryptographic knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by product: IP8 SR4 for FC72x IP8, V4.3.5618 for X200 Cloud Distribution IP8, V4.3.5617 for X300 Cloud Distribution IP8, MP4 for UL Compact Panel and Engineering Tools, V4.3.0001 for UL X300 Cloud Distribution
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-225840.html
Restart Required: Yes
Instructions:
1. Identify affected products and versions. 2. Download appropriate firmware/software updates from Siemens ProductCERT. 3. Apply updates following Siemens installation procedures. 4. Restart affected systems. 5. Verify successful update and functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate fire safety systems from untrusted networks and implement strict network access controls.
Certificate Validation Restriction
allConfigure systems to only accept certificates from trusted Certificate Authorities if supported.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate fire safety systems from all untrusted networks.
- Deploy intrusion detection/prevention systems to monitor for anomalous certificate traffic and block exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check system version against affected versions list in Siemens advisory SSA-225840. Verify if system processes X.509 certificates from network sources.Check Version:
Varies by product - typically accessible through engineering tool interface or system administration menus.Verify Fix Applied:
Confirm system version matches or exceeds patched versions listed in vendor advisory. Test certificate processing functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected service crashes or restarts
- Memory allocation errors in system logs
- Failed certificate parsing attempts
Network Indicators:
- Unusual certificate traffic to fire safety system ports
- Multiple connection attempts with malformed certificates
SIEM Query:
source="fire_safety_system" AND (event_type="crash" OR error_message="memory" OR error_message="certificate")