CVE-2013-4866 in My SATIS Genius Toilet Application
Summary
by MITRE
The LIXIL Corporation My SATIS Genius Toilet application for Android has a hardcoded Bluetooth PIN, which allows physically proximate attackers to trigger physical resource consumption (water or heat) or user discomfort.
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Analysis
by VulDB Data Team • 06/24/2024
The CVE-2013-4866 vulnerability represents a critical security flaw in the LIXIL Corporation My SATIS Genius Toilet Android application that demonstrates poor security practices in IoT device management. This vulnerability specifically targets the Bluetooth communication protocol used by the smart toilet system, where a hardcoded PIN value is embedded within the application code. The presence of such a hardcoded credential creates a fundamental security weakness that directly violates established security principles and best practices for mobile application development. The vulnerability is particularly concerning because it exposes a physical access attack vector that can be exploited by adversaries who are in close physical proximity to the target device.
The technical implementation of this flaw involves the application's hardcoded Bluetooth PIN that remains static across all installations and device deployments. This design choice eliminates any possibility for dynamic credential generation or secure authentication mechanisms, effectively providing attackers with a persistent access method that does not require any additional reconnaissance or exploitation techniques. The vulnerability can be categorized under CWE-259 as a "Use of Hard-coded Password" and aligns with ATT&CK technique T1185 which covers "Man in the Middle" attacks through the exploitation of weak authentication mechanisms. The hardcoded nature of the PIN means that any individual who can obtain a copy of the application or reverse engineer its components can potentially gain unauthorized access to the toilet's physical functions.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential physical harm and resource misuse. Attackers with proximity access can trigger water or heat consumption, potentially leading to waste of resources, system malfunctions, or even safety hazards in the toilet's operation. The vulnerability creates a scenario where malicious actors can cause user discomfort through unintended activation of toilet functions, while also enabling resource consumption that could result in increased utility bills or system strain. This represents a direct violation of user privacy and device security expectations, particularly in residential or commercial settings where such devices are deployed. The physical nature of the attack vector means that traditional network-based security measures cannot protect against this specific threat, as the attack requires only physical proximity rather than network access.
Mitigation strategies for this vulnerability require immediate remediation of the hardcoded credential issue through secure credential management practices. The application must be updated to implement dynamic authentication mechanisms that do not rely on static credentials embedded within the code. Security measures should include proper key management systems, secure credential storage practices, and implementation of secure communication protocols that do not depend on hardcoded values. Organizations should also consider implementing device pairing mechanisms that require user authentication and establish secure communication channels that cannot be easily exploited through reverse engineering. Additionally, the vulnerability highlights the importance of security reviews for IoT applications and adherence to secure development lifecycle practices that prevent such fundamental flaws from being introduced during the initial development phase. The remediation process should also include comprehensive security testing of mobile applications before deployment, particularly focusing on credential management and authentication mechanisms that do not rely on hardcoded values.