Advisory Details

December 20th, 2023

BlueZ Phone Book Access Profile Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2023-50229
CVSS SCORE	7.1, AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	BlueZ
AFFECTED PRODUCTS	BlueZ
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of BlueZ. User interaction is required to exploit this vulnerability in that the target must connect to a malicious Bluetooth device. The specific flaw exists within the handling of the Phone Book Access profile. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	BlueZ has issued an update to correct this vulnerability. More details can be found at: https://github.com/bluez/bluez/commit/5ab5352531a9cc7058cce569607f3a6831464443
DISCLOSURE TIMELINE	2023-04-26 - Vulnerability reported to vendor 2023-12-20 - Coordinated public release of advisory
CREDIT	Lucas Leong (@_wmliang_) of Trend Micro Zero Day Initiative

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