SB2021112924 - Multiple vulnerabilities in BlueZ

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2019-8922)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within bluetoothd. A remote attacker on the local network can send specially crafted data to the system, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Out-of-bounds read (CVE-ID: CVE-2019-8921)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing verification checks when handling consecutive SVC_ATTR_REQ requests within the service_attr_req() function in sdpd-request.c in bluetoothd . A remote attacker on the local network can send specially crafted CSTATE data to the system and trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data.

Remediation

Install update from vendor's website.

References

• https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-overflow/
• https://security.netapp.com/advisory/ntap-20211203-0002/
• https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html