Heap-based Buffer Overflow in BlueZ Bluetooth Stack by Linux Vendor

CVE-2019-8922

What is CVE-2019-8922?

A heap-based buffer overflow has been identified in the BlueZ Bluetooth stack, specifically affecting versions up to 5.48. The vulnerability arises from the lack of sufficient validation on the size of the destination buffer when handling requests. The affected function simply appends requested attributes to the output buffer without performing any size checks. As a result, an attacker capable of crafting a request with a large enough response can trigger a heap overflow, potentially leading to unauthorized access or system instability. This issue highlights the importance of robust input validation and memory management in software design.

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