SB2021112340 - Ubuntu update for bluez 

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Main Vulnerability Database SB2021112340

SB2021112340 - Ubuntu update for bluez

Published: November 23, 2021

Security Bulletin ID SB2021112340
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Physical access
Highest impact Data manipulation

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) 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.


2) Memory leak (CVE-ID: CVE-2021-41229)

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in sdp_cstate_alloc_buf() function. A remote attacker can send specially crafted packets to the device and perform denial of service attack.


3) 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.

References