CVE-2016-10372 in D1000 Modem
Summary
by MITRE
The Eir D1000 modem does not properly restrict the TR-064 protocol, which allows remote attackers to execute arbitrary commands via TCP port 7547, as demonstrated by opening WAN access to TCP port 80, retrieving the login password (which defaults to the Wi-Fi password), and using the NewNTPServer feature.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/29/2020
The Eir D1000 modem vulnerability represents a critical security flaw in telecommunications infrastructure that exposes devices to remote command execution attacks through improper protocol restrictions. This vulnerability specifically targets the TR-064 protocol implementation within the modem's firmware, which is designed to provide remote management capabilities for network devices. The flaw allows attackers to bypass normal access controls and execute arbitrary commands on the device through TCP port 7547, creating a significant attack surface that can be exploited without authentication. The vulnerability demonstrates a fundamental failure in the modem's security architecture where legitimate management protocols are not properly constrained, enabling unauthorized access to critical system functions.
The technical implementation of this vulnerability stems from inadequate input validation and access control mechanisms within the TR-064 protocol handler. Attackers can exploit this weakness by sending specially crafted requests to TCP port 7547, which serves as the primary interface for remote management operations. The exploitation process begins with opening WAN access to TCP port 80, which serves as a pivot point for further attacks, followed by retrieving the default login credentials that are typically synchronized with the Wi-Fi password. This credential leakage represents a particularly dangerous aspect of the vulnerability as it provides attackers with legitimate access to the device's management interface. The NewNTPServer feature becomes a critical attack vector because it allows arbitrary command execution through the network time protocol configuration, enabling attackers to modify system settings and execute malicious code.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential network infiltration. Remote attackers can gain persistent access to the modem's management interface, allowing them to modify network configurations, redirect traffic, and establish backdoors for continued access. The default password configuration creates a widespread risk across all affected devices, as many users never change the default credentials. This vulnerability aligns with CWE-284 (Improper Access Control) and CWE-798 (Use of Hard-coded Credentials) categories, demonstrating how improper access control combined with hard-coded credentials creates a dangerous combination. The attack vector also maps to ATT&CK technique T1059 (Command and Scripting Interpreter) and T1021.1 (Remote Services) as attackers can execute commands through the remote management interface and establish persistent access through network services.
Mitigation strategies for this vulnerability require immediate firmware updates from the manufacturer, as well as network-level protections to restrict access to TCP port 7547. Organizations should implement network segmentation to isolate management interfaces from public networks and deploy intrusion detection systems to monitor for suspicious TR-064 protocol traffic. The vulnerability highlights the importance of proper protocol hardening and access control implementation in network infrastructure devices. Security teams should conduct comprehensive network assessments to identify all affected devices and ensure that default credentials are changed immediately. Additionally, implementing network access controls through firewalls and access control lists can prevent unauthorized access to the management ports. The vulnerability demonstrates the critical need for security by design principles in telecommunications equipment, where management protocols should be properly restricted and authenticated before allowing remote access to network infrastructure components.