CVE-2023-23770 in MBTS Site Controller
Summary
by MITRE • 08/29/2023
Motorola MBTS Site Controller accepts hard-coded backdoor password. The Motorola MBTS Site Controller Man Machine Interface (MMI), allowing for service technicians to diagnose and configure the device, accepts a hard-coded backdoor password that cannot be changed or disabled.
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Analysis
by VulDB Data Team • 09/22/2023
The vulnerability identified as CVE-2023-23770 represents a critical security flaw in Motorola's MBTS Site Controller system, specifically within its Man Machine Interface component. This device serves as a crucial interface for service technicians to perform diagnostic and configuration tasks on mobile base station systems, making it a prime target for unauthorized access attempts. The presence of a hard-coded backdoor password fundamentally undermines the security posture of the entire system, as it provides persistent unauthorized access capabilities that remain active regardless of standard security measures or administrative actions.
This technical flaw manifests as a hardcoded authentication credential that persists across system reboots and configuration changes, effectively creating an eternal backdoor for malicious actors. The vulnerability stems from poor security design practices where developers embedded default credentials directly into the firmware without providing mechanisms for modification or removal. This approach violates fundamental security principles and aligns with CWE-798, which specifically addresses the use of hardcoded credentials in software systems. The backdoor password remains unchanged across all versions and deployments, making it an attractive target for attackers who can leverage this persistent access point to gain unauthorized control over critical telecommunications infrastructure.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to perform comprehensive system manipulation including configuration changes, data exfiltration, and potentially disruptive operations that could affect network availability. Service technicians who rely on the MMI interface for legitimate purposes may inadvertently compromise system integrity if they are unaware of the backdoor, while attackers can exploit this weakness to conduct reconnaissance, establish persistent access, or execute more sophisticated attacks. The vulnerability directly maps to ATT&CK technique T1078.004, which covers legitimate credentials obtained through default accounts, and represents a significant risk to network infrastructure security. Organizations using Motorola MBTS Site Controllers face potential exposure to advanced persistent threats that can remain undetected for extended periods due to the persistent nature of the backdoor access.
Mitigation strategies for this vulnerability require immediate action including disabling or removing the affected devices from production environments until proper security patches are available, implementing network segmentation to limit access to these systems, and conducting comprehensive inventory assessments to identify all affected devices. Organizations should also consider deploying network monitoring solutions specifically designed to detect unauthorized access attempts to known default credentials and implement strict access controls for service technician activities. The vulnerability demonstrates the critical importance of secure development practices and proper credential management, as it represents a failure to implement basic security controls that should have been part of the initial design phase. Until official patches are released by Motorola, network administrators should assume that any system with this vulnerability is compromised and take appropriate defensive measures to protect their telecommunications infrastructure.