CVE-2025-21002 in Samsung
Summary
by MITRE • 07/08/2025
Improper access control in LeAudioService prior to SMR Jul-2025 Release 1 allows local attackers to manipulate broadcasting Auracast.
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Analysis
by VulDB Data Team • 07/08/2025
The vulnerability identified as CVE-2025-21002 represents a critical access control flaw within the LeAudioService component of a mobile operating system prior to the SMR Jul-2025 Release 1. This issue affects the Bluetooth Low Energy audio streaming functionality that enables Auracast broadcasting capabilities, which are essential for wireless audio transmission between devices. The vulnerability stems from insufficient authorization checks and validation mechanisms within the service that handles audio streaming operations, creating a pathway for unauthorized manipulation of broadcast parameters. The flaw specifically impacts the local attack surface where an attacker with physical or application-level access to the device can exploit this weakness to alter audio streaming configurations without proper authentication or authorization.
The technical implementation of this vulnerability manifests through inadequate input validation and privilege escalation mechanisms within the LeAudioService framework. Attackers can manipulate broadcast parameters such as audio quality settings, transmission power levels, and network configuration values that control how Auracast streams are transmitted to connected devices. This improper access control allows malicious actors to potentially disrupt audio services, inject unauthorized content, or redirect audio streams to unintended recipients. The vulnerability is classified under CWE-284 which specifically addresses improper access control, and aligns with ATT&CK technique T1068 which covers local privilege escalation. The service lacks proper checks to verify that only authorized applications or system components can modify the broadcast parameters, enabling arbitrary code execution within the audio streaming context.
The operational impact of this vulnerability extends beyond simple audio manipulation to potentially compromise the integrity of wireless audio ecosystems and create security risks for connected devices. Local attackers can exploit this weakness to disrupt audio services, potentially causing audio quality degradation or complete service interruption for legitimate users. More concerning is the possibility of unauthorized content injection where malicious actors could broadcast altered audio streams to other devices within range, creating potential for data exfiltration or service disruption attacks. The vulnerability affects the broader Bluetooth ecosystem by weakening the security boundaries around audio streaming services, which could enable attackers to establish persistent access points for further exploitation. This weakness particularly impacts environments where Auracast is used for professional audio applications, public address systems, or secure communication channels where audio integrity is paramount.
Mitigation strategies for CVE-2025-21002 require immediate implementation of the SMR Jul-2025 Release 1 which contains the necessary patches and access control improvements for the LeAudioService. Organizations should implement comprehensive device management policies that enforce timely security updates and monitor for unauthorized application installations that might exploit this vulnerability. Network administrators should consider implementing additional security controls such as application whitelisting and enhanced monitoring of Bluetooth audio streaming activities to detect anomalous behavior patterns. The vulnerability demonstrates the importance of proper privilege separation and input validation in system services, particularly those handling real-time multimedia streams. Security teams should conduct thorough vulnerability assessments of all Bluetooth-related services and implement principle of least privilege configurations to minimize potential attack surfaces. Additionally, regular security audits of system components should verify that access control mechanisms are properly enforced and that no unauthorized modification paths exist for critical audio streaming functionalities.