CVE-2024-2105 is a vulnerability identified in the JBL Flip 5 Bluetooth speaker, classified under CWE-1287, which involves improper validation of the specified type of input during the Bluetooth Low Energy (BLE) connection request. Specifically, an unauthorised attacker within Bluetooth range can send malformed or unexpected BLE connection requests that the device fails to properly validate. This improper validation leads to a deadlock condition in the device's firmware or Bluetooth stack, effectively causing the device to become unresponsive or non-functional until it is reset or power-cycled. The vulnerability affects all versions of the JBL Flip 5, indicating a systemic issue in the device's BLE connection handling. The attack vector requires proximity to the device (Bluetooth range), does not require any prior authentication or pairing, and does not need user interaction, making it relatively easy to exploit in accessible environments. The impact is limited to availability, as confidentiality and integrity of data are not affected. The CVSS v3.1 base score is 6.5, reflecting a medium severity level primarily due to the denial of service impact and ease of exploitation. No patches or firmware updates have been published at the time of this report, and no known exploits have been observed in the wild. The vulnerability was reserved in early 2024 and published in December 2025, indicating a recent discovery and disclosure. This issue highlights the risks of improper input validation in embedded Bluetooth devices, which can be exploited to disrupt device operation.

For European organizations, the primary impact of CVE-2024-2105 is the potential denial of service of JBL Flip 5 devices within Bluetooth range of an attacker. While these devices are consumer-grade Bluetooth speakers, they may be used in office environments, meeting rooms, or public spaces. An attacker could disrupt audio services, causing inconvenience or interruption of communications relying on these devices. Although the impact is not critical to core IT infrastructure, in environments where JBL Flip 5 speakers are integrated into conference systems or public announcement setups, this could degrade operational effectiveness. The vulnerability does not compromise sensitive data or device integrity but poses a risk to availability. Organizations with open or poorly controlled Bluetooth environments are more vulnerable. The lack of authentication or user interaction requirements lowers the barrier for exploitation. However, the limited range of Bluetooth and the need for physical proximity constrain the threat scope. No known exploits in the wild reduce immediate risk, but awareness and preventive measures are advisable. The impact is thus moderate but could be significant in specific use cases or high-density device deployments.

Given the absence of a published patch or firmware update from JBL, mitigation focuses on reducing the attack surface and exposure. European organizations should implement strict Bluetooth access controls, including disabling Bluetooth on devices where not needed and enforcing device pairing policies. Physical security measures should limit attacker proximity to vulnerable devices, especially in public or semi-public spaces. Network segmentation and monitoring of Bluetooth traffic can help detect anomalous connection attempts. Where possible, replace or upgrade devices to models with confirmed security patches addressing this vulnerability. Educate users and IT staff about the risks of Bluetooth-based attacks and encourage reporting of device malfunctions. For critical environments, consider using wired audio solutions or Bluetooth devices from vendors with stronger security track records. Monitoring JBL's official channels for firmware updates or advisories is essential to apply patches promptly once available. Additionally, organizations can employ Bluetooth intrusion detection systems to alert on suspicious connection requests.