CVE-2023-53970
📋 TL;DR
This authentication bypass vulnerability in Screen SFT DAB 600/C devices allows attackers to reset device configurations without valid credentials by reusing IP-bound session identifiers. Attackers exploit weak session management in the deviceManagement API endpoint to send crafted POST requests. Organizations using affected firmware versions are at risk of unauthorized device manipulation.
💻 Affected Systems
- Screen SFT DAB 600/C
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover allowing attackers to reset configurations, disrupt broadcast operations, or potentially inject malicious content into broadcast streams.
Likely Case
Unauthorized device configuration changes leading to service disruption, broadcast interference, or loss of device management control.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external attackers from reaching vulnerable endpoints.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB (ID 51459). Attack requires network access to the device's management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Contact vendor for updated firmware or security guidance.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and restrict access to management interfaces.
Access Control Lists
allImplement strict firewall rules to allow only authorized IP addresses to access device management interfaces.
🧯 If You Can't Patch
- Implement network segmentation to isolate affected devices from untrusted networks
- Deploy intrusion detection systems to monitor for exploitation attempts on device management endpoints
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH. If running 1.9.3, device is vulnerable.Check Version:
Check via device web interface or contact vendor for version verification method.Verify Fix Applied:
Verify firmware has been updated to a version later than 1.9.3 or vendor-provided secure version.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to deviceManagement endpoint
- Device configuration reset events from unauthorized IPs
- Multiple failed authentication attempts followed by successful configuration changes
Network Indicators:
- Crafted POST requests to /api/deviceManagement with manipulated session parameters
- Traffic from unexpected sources to device management ports
SIEM Query:
source_ip NOT IN (authorized_ips) AND dest_port=80 AND http_method=POST AND uri_path CONTAINS 'deviceManagement'🔗 References
- https://www.dbbroadcast.com
- https://www.dbbroadcast.com/products/radio/sft-dab-series-compact-air/
- https://www.exploit-db.com/exploits/51459
- https://www.vulncheck.com/advisories/screen-sft-dab-c-firmware-authentication-bypass-reset-board-config
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5775.php
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5775.php
