CVE-2016-2398 in XFINITY Home Security System
Summary
by MITRE
Comcast XFINITY Home Security System does not properly maintain base-station communication, which allows physically proximate attackers to defeat sensor functionality by interfering with ZigBee 2.4 GHz transmissions.
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Analysis
by VulDB Data Team • 10/31/2024
The vulnerability identified as CVE-2016-2398 affects the Comcast XFINITY Home Security System, specifically targeting the base-station communication mechanisms that govern sensor functionality within residential security environments. This weakness represents a significant security flaw in the Internet of Things (IoT) ecosystem where wireless communication protocols fail to adequately protect against physical interference attacks. The issue manifests through the improper handling of ZigBee communication protocols operating in the 2.4 GHz frequency band, which are fundamental to the security system's operational integrity.
The technical flaw stems from inadequate interference resistance mechanisms within the base-station's communication architecture, allowing attackers with physical proximity to disrupt wireless transmissions between security sensors and the central hub. This vulnerability operates at the wireless protocol level where the system fails to implement robust error detection and correction mechanisms necessary to maintain communication integrity. The ZigBee protocol implementation lacks proper signal validation and authentication checks that would normally prevent unauthorized interference, creating a pathway for attackers to manipulate sensor data through simple physical means such as transmitting jamming signals in the same frequency spectrum.
The operational impact of this vulnerability extends beyond mere convenience issues, fundamentally compromising the security posture of residential environments. An attacker positioned within physical proximity can effectively disable security sensors by overwhelming the ZigBee communication channels, potentially allowing unauthorized access to homes without triggering alarms or alerts. This represents a critical failure in the security system's ability to maintain reliable communication pathways, as the system cannot distinguish between legitimate sensor transmissions and interference caused by malicious actors. The vulnerability directly impacts the system's ability to detect and respond to security breaches, creating a false sense of security for users who believe their systems are actively monitoring their premises.
From a cybersecurity perspective, this vulnerability aligns with CWE-310, which addresses cryptographic weaknesses in communication protocols, and demonstrates how physical security considerations intersect with digital security frameworks. The attack vector specifically maps to ATT&CK technique T1046, which covers network service scanning and manipulation, while also relating to T1059 for command and control through physical interference methods. The vulnerability's classification as a communication integrity issue suggests that proper implementation of signal processing algorithms and frequency hopping mechanisms could have prevented the exploitation. Organizations should consider implementing robust wireless communication protocols that include automatic frequency hopping, signal strength monitoring, and anomaly detection systems to prevent similar vulnerabilities in IoT security infrastructures.
Mitigation strategies should focus on enhancing the base-station's ability to detect and respond to interference conditions through improved error correction protocols and signal validation mechanisms. The implementation of frequency agility features that automatically switch between available channels when interference is detected would significantly reduce the exploitability of this vulnerability. Additionally, incorporating authentication mechanisms that verify sensor identities and implementing redundant communication paths could prevent single points of failure in the security system's wireless infrastructure. Organizations should also establish regular security assessments of their IoT devices to identify similar communication protocol weaknesses that could enable physical interference attacks, ensuring that wireless security systems maintain their integrity even when subjected to adversarial conditions in the physical environment.