CVE-2024-52285
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to access sensitive data through exposed MQTT URLs without authentication in SiPass integrated access control systems. Affected organizations include those using SiPass integrated AC5102 (ACC-G2) or SiPass integrated ACC-AP devices.
💻 Affected Systems
- SiPass integrated AC5102 (ACC-G2)
- SiPass integrated ACC-AP
⚠️ 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
Attackers could access sensitive access control data, user credentials, device configurations, or manipulate access control systems to gain unauthorized physical access.
Likely Case
Unauthenticated attackers accessing sensitive configuration data, user information, or device status through exposed MQTT endpoints.
If Mitigated
Limited to internal network access with proper segmentation and authentication controls in place.
🎯 Exploit Status
Exploitation requires network access to MQTT endpoints (typically port 1883/8883).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V6.4.8
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-515903.html
Restart Required: Yes
Instructions:
1. Download V6.4.8 firmware from Siemens support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or management console. 4. Verify successful update and restore configuration if needed.
🔧 Temporary Workarounds
Network segmentation
allIsolate affected devices from untrusted networks and internet exposure
Firewall restrictions
linuxBlock external access to MQTT ports (1883/TCP, 8883/TCP)
iptables -A INPUT -p tcp --dport 1883 -j DROP
iptables -A INPUT -p tcp --dport 8883 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit MQTT traffic to authorized management systems only
- Monitor MQTT traffic for unauthorized access attempts and implement intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or console. If version < V6.4.8, device is vulnerable.Check Version:
Check via web interface at http(s)://device-ip/ or console connectionVerify Fix Applied:
Confirm firmware version is V6.4.8 or higher and test MQTT endpoints require authentication.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated MQTT connection attempts
- Access to sensitive MQTT topics from unauthorized sources
Network Indicators:
- Unencrypted MQTT traffic to port 1883 from external sources
- MQTT CONNECT packets without authentication credentials
SIEM Query:
source_port=1883 OR source_port=8883 AND (NOT auth_success=true)