Vulnerability in mt76 Monitor Mode Crash with SDIO Driver in Kernel
Summary
GSD-2022-1001387: mt76: fix monitor mode crash with sdio driver. Affects Kernel versions < c37b4cab3d97ef64b206fca4d9daabd9aff7356e. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between the hardware and software layers. It is responsible for managing system resources, handling device drivers, and facilitating communication between different software components. The mt76 driver is specifically designed for MediaTek MT76x0 and MT76x2 wireless network adapters. It enables these devices to connect to wireless networks and provides various functionalities, including monitor mode for capturing network traffic. However, a vulnerability has been identified in the mt76 driver when used with the SDIO driver, which can lead to a crash in monitor mode.
Vulnerability Detail
The vulnerability in the mt76 driver occurs when it is used in conjunction with the SDIO driver. In certain scenarios, when the mt76 driver is set to monitor mode to capture network traffic, it can trigger a crash in the system. This crash can potentially lead to a denial-of-service (DoS) condition, impacting the availability and stability of the affected system. The vulnerability has been addressed in the Linux Kernel version v5.16.20 through the commit c37b4cab3d97ef64b206fca4d9daabd9aff7356e.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a potential workaround is to avoid using monitor mode with the mt76 driver when it is being used in conjunction with the SDIO driver. By disabling monitor mode or using alternative wireless network adapters, the system can be protected from the crash triggered by this vulnerability.
Conclusion
The vulnerability in the mt76 driver when used with the SDIO driver can lead to a crash in monitor mode, potentially causing a denial-of-service (DoS) condition. It is crucial to update the Linux Kernel to version v5.16.20 or later to address this vulnerability. If immediate Kernel update is not possible, avoiding the use of monitor mode with the mt76 driver in conjunction with the SDIO driver can serve as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a crash in the system when the mt76 driver is used in monitor mode with the SDIO driver. This crash can result in a denial-of-service (DoS) condition, affecting the availability and stability of the affected system.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. It analyzes the manifest file, such as package-lock.json, and provides real-time monitoring and alerts for open-source vulnerabilities.
Yes, the vulnerability has been fixed in the Linux Kernel version v5.16.20 through the commit c37b4cab3d97ef64b206fca4d9daabd9aff7356e. Updating the Kernel to this version or later will address the vulnerability.
If updating the Kernel is not immediately feasible, you can mitigate the vulnerability by avoiding the use of monitor mode with the mt76 driver when it is used in conjunction with the SDIO driver. Disabling monitor mode or using alternative wireless network adapters can help protect the system from the crash triggered by this vulnerability.
You can refer to the vulnerability details in the GSD Database maintained by the Cloud Security Alliance. The specific vulnerability ID is GSD-2022-1001387, and the details can be found at: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1001xxx/GSD-2022-1001387.json
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