CVE-2019-3998 in SS3
Summary
by MITRE
Authentication bypass using an alternate path or channel in SimpliSafe SS3 firmware 1.4 allows a local, unauthenticated attacker to modify the Wi-Fi network the base station connects to.
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Analysis
by VulDB Data Team • 03/31/2024
The vulnerability identified as CVE-2019-3998 represents a critical authentication bypass flaw within the SimpliSafe SS3 security system firmware version 1.4. This issue resides in the wireless network configuration management component of the base station device, creating a pathway for malicious actors to gain unauthorized access to critical system functions. The flaw specifically enables local attackers who are already within physical proximity of the device to circumvent normal authentication mechanisms and manipulate the device's network connectivity settings without requiring valid credentials or authorization.
The technical implementation of this vulnerability stems from improper validation of network configuration changes within the firmware's wireless management interface. When the base station processes requests to modify Wi-Fi network parameters, the authentication checks fail to properly verify the legitimacy of the request source or intent. This weakness allows an attacker with physical access to the device to directly manipulate the network configuration through alternative communication channels or pathways that bypass the standard authentication protocols. The vulnerability essentially creates a backdoor mechanism within the device's normal operational flow, enabling unauthorized network modifications through direct system interaction.
The operational impact of this vulnerability extends beyond simple network configuration changes, as it fundamentally compromises the security posture of the entire SimpliSafe ecosystem. An attacker who successfully exploits this vulnerability can redirect the base station to connect to malicious Wi-Fi networks, potentially enabling man-in-the-middle attacks, network traffic interception, or complete system compromise. This represents a significant risk to the integrity of the security system, as it allows unauthorized modification of the device's communication infrastructure and could lead to complete loss of system control or data exfiltration. The local nature of the attack vector means that physical proximity to the device is sufficient for exploitation, making it particularly concerning for residential and commercial installations.
The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and demonstrates characteristics consistent with attack patterns documented in the MITRE ATT&CK framework under the T1072 technique for "Software Deployment Tools" and T1566 for "Phishing for Information". Organizations should implement immediate mitigation strategies including firmware updates from the vendor, network segmentation to isolate security devices, and physical security measures to prevent unauthorized access to critical infrastructure. Additional protective measures such as network monitoring for unusual connection patterns, regular security audits of IoT devices, and implementation of secure network configuration management protocols can help reduce the risk of exploitation. The incident highlights the importance of robust authentication mechanisms in embedded systems and underscores the need for comprehensive security testing throughout the device lifecycle to prevent similar vulnerabilities from being introduced in future firmware versions.