CVE-2023-51596: 
Alma Linux vulnerability analysis and mitigation

CVE-2023-51596 is a heap-based buffer overflow vulnerability in BlueZ's Phone Book Access Profile. The vulnerability was discovered and reported by Lucas Leong of Trend Micro Zero Day Initiative, with initial disclosure on December 21, 2023. This security flaw affects BlueZ installations and requires user interaction in the form of connecting to a malicious Bluetooth device (Zero Day Initiative).

The vulnerability stems from improper validation of user-supplied data length before copying it to a fixed-length heap-based buffer within the Phone Book Access profile handling. The issue has been assigned a CVSS v3 base score of 7.1 (High) with the vector string CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H. The vulnerability is classified as CWE-122 (Heap-based Buffer Overflow) (Zero Day Initiative, Red Hat).

If successfully exploited, this vulnerability allows network-adjacent attackers to execute arbitrary code in the context of root on affected BlueZ installations. The high severity rating indicates potential for complete compromise of system confidentiality, integrity, and availability (Zero Day Initiative).

Given the nature of the vulnerability, the primary mitigation strategy is to restrict interaction with the application. Updates have been released through various vendors, including Red Hat, which has addressed this vulnerability in their security advisory RHSA-2024:9413 (Red Hat).