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THREATINT
PUBLISHED

CVE-2025-3885

Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability



Description

Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition on affected installations of Harman Becker MGU21 devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Bluetooth stack of the BCM89359 chipset. The issue results from the lack of proper validation of Bluetooth frames. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-23942.

Reserved 2025-04-22 | Published 2025-05-22 | Updated 2025-05-22 | Assigner zdi


MEDIUM: 5.3CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-20: Improper Input Validation

Product status

Default status
unknown

MGU21_22-07 firmware with BCM89359 wireless chipset; LMP Version: 5.0 (0x9); LMP Subversion: 0x420d
affected

References

www.zerodayinitiative.com/advisories/ZDI-25-251/ (ZDI-25-251)

cve.org (CVE-2025-3885)

nvd.nist.gov (CVE-2025-3885)

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