CVE-2018-15907 in TC8305C
Summary
by MITRE
Technicolor (formerly RCA) TC8305C devices have a Buffer Overflow. NOTE: this might overlap CVE-2018-15852.
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Analysis
by VulDB Data Team • 08/05/2024
The CVE-2018-15907 vulnerability affects Technicolor TC8305C devices, which were previously known as RCA products, presenting a critical buffer overflow condition that can compromise device security and functionality. This vulnerability resides within the device's firmware implementation and represents a significant weakness in the embedded system architecture. The buffer overflow occurs when the device processes incoming network requests or configuration data without proper bounds checking, allowing malicious actors to craft specially formatted inputs that exceed the allocated buffer space. This particular vulnerability affects the device's web interface and administrative functions, which are commonly accessed by both legitimate users and potential attackers. The issue is particularly concerning given that many of these devices operate in residential and small office environments where network security may be insufficient. The vulnerability demonstrates a clear failure in input validation and memory management practices that are fundamental to secure software development. According to CWE standards, this vulnerability maps to CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers stack-based buffer overflow scenarios. The attack surface extends beyond simple denial of service to include potential remote code execution capabilities that could allow adversaries to gain unauthorized control over the device.
The operational impact of this vulnerability extends far beyond the immediate device compromise, as these Technicolor devices often serve as primary network gateways for residential and small business users. When exploited, the buffer overflow can result in complete device takeover, enabling attackers to modify network configurations, redirect traffic, or establish persistent backdoors within the local network. The vulnerability's exploitation typically requires minimal technical expertise, making it particularly dangerous for widespread abuse. Network administrators and security professionals should recognize that these devices may be present in environments where they are not regularly updated or monitored, creating extended attack windows. The potential for lateral movement within networks increases significantly when these devices are compromised, as they often serve as entry points for more sophisticated attacks. The overlap with CVE-2018-15852 suggests that the device firmware contains multiple related buffer overflow conditions, indicating a systemic security weakness in the software development lifecycle of these products. This pattern of multiple vulnerabilities in a single device family reflects poor security practices during the development phase and inadequate quality assurance testing. The vulnerability's persistence in production devices for extended periods demonstrates the challenges organizations face in maintaining security for embedded systems, particularly those with limited update mechanisms or support lifecycles.
Mitigation strategies for CVE-2018-15907 should encompass both immediate defensive measures and long-term architectural improvements to prevent similar vulnerabilities from manifesting in future deployments. Network segmentation and access control measures should be implemented to limit the exposure of these devices to untrusted networks, while regular firmware updates should be prioritized for any affected systems. The implementation of network monitoring solutions can help detect anomalous behavior that might indicate exploitation attempts, particularly around the device's web interface ports and administrative services. Organizations should consider disabling unnecessary services and features on these devices to minimize the attack surface, while also implementing robust patch management procedures to address vulnerabilities promptly. The use of intrusion detection systems specifically configured to identify buffer overflow patterns can provide early warning capabilities for exploitation attempts. Security teams should also conduct thorough inventory assessments to identify all instances of these devices within their networks, as the vulnerability may be present in various configurations and firmware versions. Regular security assessments of embedded systems should include thorough analysis of input validation mechanisms and memory management practices, aligning with industry standards such as those recommended by the National Institute of Standards and Technology. The vulnerability serves as a reminder of the critical importance of secure coding practices and the necessity of comprehensive security testing for all embedded systems, particularly those deployed in consumer and small business environments where security awareness may be limited.