CVE-2018-20959 in Jura
Summary
by MITRE
Jura E8 devices lack Bluetooth connection security.
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Analysis
by VulDB Data Team • 11/21/2023
The CVE-2018-20959 vulnerability affects Jura E8 coffee makers and represents a significant security flaw in IoT device Bluetooth connectivity. This vulnerability stems from inadequate implementation of Bluetooth security protocols within the device's wireless communication stack, leaving it susceptible to various attack vectors that could compromise user privacy and device integrity. The vulnerability specifically targets the Bluetooth connection mechanism that allows users to configure and control their coffee makers through mobile applications, creating a persistent security risk that extends beyond simple network access.
The technical flaw manifests in the device's failure to implement proper Bluetooth security measures such as secure authentication protocols, encryption of communication channels, and proper connection validation mechanisms. This weakness allows attackers within proximity range to potentially intercept, manipulate, or gain unauthorized access to the device's control functions through unauthenticated Bluetooth connections. The vulnerability aligns with CWE-311, which addresses the absence of encryption of sensitive data, and represents a failure to implement proper cryptographic controls for wireless communications. Attackers could exploit this weakness to remotely control the coffee maker, potentially accessing user preferences, operational settings, or even causing physical harm through unauthorized operation.
The operational impact of this vulnerability extends beyond simple privacy concerns to encompass potential safety risks and user data exposure. An attacker with physical proximity to the device could potentially manipulate brewing parameters, access user configuration data, or even disrupt the device's normal operation. This vulnerability particularly affects IoT ecosystems where devices lack proper security implementations, creating entry points for broader network compromise. The risk is amplified by the fact that many IoT devices like coffee makers often contain user preferences and operational data that could be valuable to attackers. This weakness also relates to ATT&CK technique T1215 which involves use of remote access tools, and T1046 which covers network service scanning, as attackers could potentially map and exploit multiple devices within the same network.
Mitigation strategies for this vulnerability require immediate implementation of proper Bluetooth security protocols including mandatory encryption of all communication channels, implementation of strong authentication mechanisms, and regular firmware updates to address known security gaps. Device manufacturers should implement secure Bluetooth pairing processes that require user verification before establishing connections, and ensure that all wireless communication is encrypted using industry-standard protocols such as AES-256. Organizations should conduct regular security assessments of their IoT device fleets and implement network segmentation to isolate potentially vulnerable devices from critical systems. The vulnerability highlights the importance of secure-by-design principles in IoT development and underscores the need for comprehensive security testing throughout the device lifecycle, particularly focusing on wireless communication protocols and their implementation security controls.