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CVE-2019-8922

Status Candidate

Overview

A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on whether there is enough space in the destination buffer. The function simply appends all data passed to it. The values of all attributes that are requested are appended to the output buffer. There are no size checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by process_request (in sdpd-request.c), which also allocates the response buffer.

Related Files

Ubuntu Security Notice USN-5183-1
Posted Dec 9, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5183-1 - Julian Rauchberger discovered that BlueZ incorrectly handled memory when processing SDP attribute requests. A remote attacker could use this issue to cause BlueZ to crash, leading to a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-8922
SHA-256 | 5a8ba523bfe5ef5ece8e5ae5b5396645cd2be1a63fcac8710507aac26ec9ff87
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