Use-After-Free Vulnerability in BlueZ Bluetooth Stack by BlueZ Vendor
CVE-2021-43400

9.1CRITICAL

Key Information:

Vendor

Bluez

Status
Bluez
Vendor
CVE Published:
4 November 2021

What is CVE-2021-43400?

A use-after-free vulnerability has been identified in the BlueZ Bluetooth stack, specifically in the gatt-database.c file. This issue arises when a client disconnects during the D-Bus processing of a WriteValue call, potentially leading to unsafe memory access. This flaw presents risks of unintended behavior in applications relying on Bluetooth communication.

References

https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit...
https://lists.debian.org/debian-lts-announce/2022/10/msg0...
mailing-list

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2021-43400 : Use-After-Free Vulnerability in BlueZ Bluetooth Stack by BlueZ Vendor