CVE-2018-11400 in SimpliSafe Original
Summary
by MITRE
In SimpliSafe Original, the Base Station fails to detect tamper attempts: it does not send a notification if a physically proximate attacker removes the battery and external power.
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Analysis
by VulDB Data Team • 02/08/2020
The vulnerability identified as CVE-2018-11400 represents a critical security flaw in SimpliSafe Original Base Station devices that fundamentally undermines the integrity of home security systems. This weakness stems from the device's complete failure to detect and report physical tampering attempts, specifically when an attacker gains physical access to the system and removes both the battery and external power source. The vulnerability exists within the hardware and firmware design of the security system, creating a significant gap in the threat detection capabilities that security professionals and system administrators rely upon for protecting residential properties.
The technical nature of this flaw resides in the absence of proper tamper detection mechanisms within the Base Station's firmware architecture. According to CWE-308, this vulnerability falls under the category of inadequate protection against physical attacks, where the system fails to implement robust mechanisms to detect unauthorized physical access attempts. The device's inability to sense power loss conditions and subsequently trigger security notifications creates a false sense of security for users who believe their systems are actively monitoring for threats. The flaw demonstrates a fundamental failure in the security-by-design principles that should govern all connected security devices, as the system assumes that physical access to the device will not compromise its operational integrity.
Operationally, this vulnerability presents a severe risk to users of SimpliSafe Original systems, as it allows attackers to completely disable the security monitoring capabilities without alerting the system owner or security services. The attack scenario involves a physically proximate threat actor who can remove the battery and external power source, effectively rendering the security system inoperative while maintaining complete silence about the tampering event. This creates a window of opportunity for additional criminal activities such as theft, property damage, or unauthorized access to the premises. The lack of notification mechanisms means that system owners remain unaware of the compromise until they physically inspect the device, potentially allowing extended periods of vulnerability. According to ATT&CK framework category TA0005, this vulnerability enables adversaries to maintain persistence and avoid detection through physical means, which represents a significant operational advantage for attackers.
The mitigation strategies for this vulnerability require both immediate hardware and software interventions. Manufacturers must implement robust power monitoring circuits that can detect sudden power loss and trigger immediate alerts when the system transitions from normal operation to a tampered state. Firmware updates should be deployed to enable tamper detection capabilities that can identify both battery removal and power source disconnection events. Additionally, security professionals should recommend that system owners regularly inspect their devices for physical signs of tampering and implement multiple layers of security monitoring. The vulnerability highlights the critical importance of physical security measures in conjunction with digital security protocols, as the absence of proper tamper detection mechanisms can completely nullify the effectiveness of even the most sophisticated digital security systems. Organizations should also consider implementing regular security audits that include physical inspection procedures to identify potential vulnerabilities in security infrastructure that may not be detectable through digital means alone.