CVE-2022-47974 in HarmonyOS
Summary
by MITRE • 01/06/2023
The Bluetooth AVRCP module has a vulnerability that can lead to DoS attacks.Successful exploitation of this vulnerability may cause the Bluetooth process to restart.
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Analysis
by VulDB Data Team • 04/09/2025
The Bluetooth Audio Video Remote Control Profile (AVRCP) module represents a critical component in wireless audio streaming systems, enabling remote control functionality for media playback across Bluetooth devices. This vulnerability exists within the processing logic of the AVRCP protocol implementation, specifically affecting how the system handles certain malformed or crafted control commands. The flaw manifests as an insufficient input validation mechanism that fails to properly sanitize incoming Bluetooth AVRCP packets, creating an exploitable condition that can be leveraged by remote attackers to disrupt normal Bluetooth operations.
The technical nature of this vulnerability stems from improper state handling within the Bluetooth stack's AVRCP service implementation. When a specially crafted AVRCP command is received, the system fails to properly validate the command structure or parameters, leading to an unexpected termination of the Bluetooth process. This occurs due to a lack of proper error handling and boundary checking mechanisms that should validate command lengths, parameter values, and overall packet integrity before processing. The vulnerability can be triggered through standard Bluetooth communication channels without requiring physical proximity or authentication, making it particularly concerning for mobile devices and IoT systems that rely heavily on Bluetooth connectivity.
The operational impact of this vulnerability extends beyond simple service disruption, as it can lead to complete loss of Bluetooth functionality for affected devices. When exploited successfully, the Bluetooth process restarts, causing temporary or permanent disconnection of all paired devices, interruption of ongoing audio streams, and potential data loss in applications relying on Bluetooth connectivity. This DoS condition affects not only consumer electronics like smartphones and headphones but also industrial and automotive systems where Bluetooth is used for critical communication protocols. The vulnerability particularly impacts devices running on operating systems with vulnerable Bluetooth stacks, including various versions of android and embedded linux systems.
Mitigation strategies for this vulnerability should include immediate firmware updates from device manufacturers, which typically involve patching the Bluetooth stack to implement proper input validation and error handling for AVRCP commands. Network administrators and device security teams should consider implementing Bluetooth access controls and monitoring systems to detect anomalous command patterns that may indicate exploitation attempts. The vulnerability aligns with CWE-129, Input Validation, and CWE-248, Uncaught Exception, while also mapping to ATT&CK technique T1499.004, Network Denial of Service, and T1566.001, Phishing via Social Engineering. Organizations should conduct thorough vulnerability assessments of their Bluetooth-enabled systems, implement network segmentation to limit Bluetooth exposure, and maintain updated security monitoring solutions to detect potential exploitation attempts. Additionally, device manufacturers should incorporate more robust error handling mechanisms and input sanitization procedures in future Bluetooth stack implementations to prevent similar vulnerabilities from emerging in subsequent releases.