SB2022102158 - SUSE update for bluez
Published: October 21, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) 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.
2) 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.
3) Security features bypass (CVE-ID: CVE-2020-26558)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to an impersonation in the Passkey Entry protocol flaw. A remote attacker on the local network can perform a man-in-the-middle (MITM) attack and impersonate the initiating device without any previous knowledge.
Note: This vulnerability affects the following specifications:
- BR/EDR Secure Simple Pairing in Bluetooth Core Specifications 2.1 through 5.2
- BR/EDR Secure Connections Pairing in Bluetooth Core Specifications 4.1 through 5.2
- LE Secure Connections Pairing in Bluetooth Core Specifications 4.2 through 5.2
4) Improper access control (CVE-ID: CVE-2021-0129)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote authenticated attacker on the local network can bypass implemented security restrictions and enable information disclosure
5) Incorrect authorization (CVE-ID: CVE-2021-3658)
The vulnerability allows an attacker to gain access to sensitive information.
The vulnerability exists due to bluetoothd incorrectly saves the adapters' discoverable status
when a device is powered down, and restores it when powered up. An attacker with physical proximity to device can gain access to sensitive information.
6) Use-after-free (CVE-ID: CVE-2021-43400)
The vulnerability allows an attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in gatt-database.c on a gatt server if a client disconnects while a WriteValue call is being processed with D-Bus. An attacker with physical proximity to the system can trigger a use-after-free error and potentially execute arbitrary code.
Remediation
Install update from vendor's website.