CVE-2006-0374 in P202S
Summary
by MITRE
Advantage Century Telecommunication (ACT) P202S IP Phone 1.01.21 running firmware 1.1.21 has multiple undocumented ports available, which (1) might allow remote attackers to obtain sensitive information, such as memory contents and internal operating-system data, by directly accessing the VxWorks WDB remote debugging ONCRPC (aka wdbrpc) on UDP 17185, (2) reflect network data using echo (TCP 7), or (3) gain access without authentication using rlogin (TCP 513).
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Analysis
by VulDB Data Team • 07/18/2018
The vulnerability identified in CVE-2006-0374 affects the Advantage Century Telecommunication P202S IP Phone running firmware version 1.1.21, presenting a critical security risk through the exposure of multiple undocumented network ports. This device operates with a VxWorks embedded operating system that exposes several service ports without proper authentication mechanisms or access controls, creating an attack surface that adversaries can exploit to gain unauthorized access to sensitive system information. The presence of these undocumented ports represents a fundamental failure in secure system design and network configuration practices.
The technical flaw manifests through three distinct attack vectors that exploit different protocols and services available on the device. The primary concern involves the VxWorks WDB remote debugging ONCRPC service running on UDP port 17185, which allows remote attackers to directly access memory contents and internal operating-system data without proper authentication. This represents a severe information disclosure vulnerability that falls under CWE-200, as it exposes sensitive data that could be leveraged for further attacks. The echo service on TCP port 7 enables reflective network data attacks, while the unauthenticated rlogin service on TCP port 513 provides direct access to the system without requiring credentials.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with multiple pathways to compromise the device and potentially the entire network segment it resides on. Attackers can leverage the WDB remote debugging service to extract sensitive memory contents, which may include system configurations, user credentials, or other confidential information. The unauthenticated rlogin service creates a direct entry point for malicious actors to establish persistent access to the device, while the echo service can be used for network reconnaissance and data reflection attacks. This vulnerability aligns with ATT&CK technique T1046, which involves discovering network services and T1075, which involves using credentials to gain access to systems.
Mitigation strategies for this vulnerability must address the fundamental issue of undocumented service exposure and lack of authentication controls. Network administrators should immediately implement firewall rules to block access to the identified ports 17185, 7, and 513 from external networks, while ensuring that only authorized internal systems can access these services when necessary. The device firmware should be updated to a version that properly configures access controls and removes unnecessary services. Organizations should also implement network segmentation to isolate IP phone devices from critical network segments and deploy intrusion detection systems to monitor for unauthorized access attempts. Additionally, regular network scanning should be conducted to identify any other undocumented services that may be exposed on similar network devices. The vulnerability demonstrates the importance of secure by design principles and proper network service configuration, as outlined in security frameworks that emphasize the need for minimum necessary service exposure and robust authentication mechanisms.