Bluetooth cmtp File Refcount Vulnerability in Linux Kernel
Summary
GSD-2021-1000603: Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails. Affects Kernel versions < 1b364f8ede200e79e25df0df588fcedc322518fb. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. The Bluetooth subsystem in the Linux Kernel enables communication between devices using Bluetooth technology. The cmtp module within the Bluetooth subsystem is responsible for handling the Cable Replacement Protocol (CMTP) used for file transfer over Bluetooth connections.
Vulnerability Detail
The Bluetooth cmtp module in the Linux Kernel is affected by a vulnerability that can lead to a file reference count issue. When the cmtp_attach_device function fails, it fails to properly handle the file reference count, leading to a potential use-after-free vulnerability. An attacker could exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround available for this vulnerability.
Conclusion
The Bluetooth cmtp file refcount vulnerability in the Linux Kernel can potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition. It is crucial to update the Linux Kernel to version v5.10.42 or later to mitigate this vulnerability. If you need further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
You can use the Vulert Playground at Vulert Scanner to check if your Linux Kernel version is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
No known exploit for this vulnerability has been reported at this time.
Unfortunately, there are no known workarounds or mitigations available for this vulnerability. It is highly recommended to update the Linux Kernel as soon as possible to address this issue.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000603.json
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