CVE-2023-23770
📋 TL;DR
Motorola MBTS Site Controller contains a hard-coded backdoor password in its Man Machine Interface (MMI) that cannot be changed or disabled. This allows attackers with network access to authenticate as service technicians and gain administrative control of the device. Organizations using Motorola MBTS Site Controllers for cellular infrastructure are affected.
💻 Affected Systems
- Motorola MBTS Site Controller
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of cellular site controller allowing reconfiguration of radio parameters, disruption of cellular service, or installation of persistent backdoors affecting entire cell sites.
Likely Case
Unauthorized access to diagnostic and configuration interfaces leading to service disruption, data interception, or lateral movement within cellular networks.
If Mitigated
Limited impact if controllers are isolated in secure network segments with strict access controls and monitoring.
🎯 Exploit Status
Exploitation requires only knowledge of the hard-coded password and network access to the controller's MMI interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
No official patch available. Contact Motorola support for firmware updates or mitigation guidance.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Motorola MBTS Site Controllers in secure network segments with strict access controls.
Access Control Lists
allImplement firewall rules to restrict access to MMI interfaces to authorized IP addresses only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate controllers from untrusted networks
- Deploy network monitoring and intrusion detection systems to detect unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to authenticate to the MMI interface using the known hard-coded backdoor password.Check Version:
Check device firmware version through administrative interface or physical labelingVerify Fix Applied:
Verify that the hard-coded password no longer provides access to the MMI interface.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful login with unusual credentials
- Configuration changes from unauthorized IP addresses
Network Indicators:
- Unauthorized access to MMI port (typically 23/telnet or specific service port)
- Traffic patterns indicating configuration changes
SIEM Query:
source_ip NOT IN authorized_ips AND destination_port=MMI_port AND auth_success=true