Bluetooth: btmtksdio use-after-free vulnerability in Kernel
Summary
GSD-2022-1002751: Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event. Affects Kernel versions >= 9aebfd4a2200ab8075e44379c758bccefdc589bb, < 01c6a899fa6be4f4cbf60c4f44f0f6691155415f. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functionalities for the proper functioning of the system. The btmtksdio module is responsible for handling Bluetooth communication over the MediaTek SDIO interface. It allows devices to connect and exchange data wirelessly. However, a use-after-free vulnerability has been discovered in the btmtksdio_recv_event function, which can lead to potential security issues.
Vulnerability Detail
The use-after-free vulnerability in the btmtksdio_recv_event function of the btmtksdio module can be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. This vulnerability occurs when the function attempts to access memory that has already been freed. By manipulating the memory layout, an attacker can potentially control the execution flow and execute malicious code. The impact of this vulnerability can range from unauthorized access to sensitive information to system crashes or even remote code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the Bluetooth functionality on their systems until the Kernel is updated. This can be achieved by unloading the btmtksdio module or disabling Bluetooth services. However, it is important to note that this workaround will temporarily disable Bluetooth functionality and may not be suitable for systems that rely heavily on Bluetooth communication.
Conclusion
The use-after-free vulnerability in the btmtksdio module of the Linux Kernel can pose significant security risks, including unauthorized access, system crashes, and potential remote code execution. It is crucial to update the Kernel to version v5.18.3 or later to patch this vulnerability. In the meantime, users can temporarily disable Bluetooth functionality as a workaround. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from unauthorized access to sensitive information to system crashes or even remote code execution.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
Yes, a temporary workaround is to disable the Bluetooth functionality on your system until the Kernel is updated. This can be achieved by unloading the btmtksdio module or disabling Bluetooth services.
To update the Linux Kernel, you can follow the official documentation provided by your Linux distribution. It typically involves using package managers or manually compiling and installing the latest Kernel version.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is always recommended to apply security patches and updates promptly to mitigate any potential risks.
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