Vulnerability in Kernel package: can: mcp251x
Summary
GSD-2021-1000325: can: mcp251x: fix resume from sleep before interface was brought up. Affects Kernel versions >= 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef, < eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21. No fix is published. How to fix ↓
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Background
The Kernel package is an essential component of the Linux operating system, responsible for managing the system's core functionality. It includes various drivers and modules that enable communication between hardware devices and the operating system. One of these modules is 'can: mcp251x,' which provides support for the MCP251x CAN controller. This controller allows devices to communicate over the Controller Area Network (CAN) protocol, commonly used in automotive and industrial applications. Unfortunately, a vulnerability has been discovered in the 'can: mcp251x' module, which could potentially lead to security breaches and system instability.
Vulnerability Detail
The vulnerability in the 'can: mcp251x' module arises from a flaw that allows the system to resume from sleep before the interface is brought up. This issue can be exploited by an attacker to gain unauthorized access to the system or disrupt its normal operation. The vulnerability was introduced in version v5.5 of the Linux Kernel and was fixed in version v5.10.38. The impact and attack plausibility of this vulnerability have not been proven yet, but it is crucial to address it to ensure the security and stability of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel package is not immediately feasible, a temporary workaround can be implemented. Users can disable the 'can: mcp251x' module by blacklisting it. This can be achieved by adding the following line to the '/etc/modprobe.d/blacklist.conf' file:
blacklist mcp251x
After adding the line, save the file and reboot the system. This workaround will prevent the vulnerable module from being loaded and mitigate the risk associated with the vulnerability.
Conclusion
The vulnerability in the 'can: mcp251x' module of the Kernel package poses a potential security risk and system instability. It is recommended to update the Kernel package to version v5.10.38 or later to fix the vulnerability. If immediate update is not possible, users can apply a temporary workaround by blacklisting the 'can: mcp251x' module. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The 'can: mcp251x' module is a part of the Linux Kernel package and provides support for the MCP251x CAN controller. This controller enables devices to communicate over the Controller Area Network (CAN) protocol, commonly used in automotive and industrial applications.
The impact of this vulnerability can vary depending on the specific system and its usage. However, it could potentially allow an attacker to gain unauthorized access to the system or disrupt its normal operation, leading to security breaches and system instability.
To fix this vulnerability, it is recommended to update the Linux Kernel package to version v5.10.38 or later. This update includes the necessary patch to address the flaw in the 'can: mcp251x' module. After updating the Kernel, reboot the system to apply the changes.
Yes, if updating the Kernel package is not immediately feasible, a temporary workaround can be implemented. Users can disable the 'can: mcp251x' module by blacklisting it. This can be achieved by adding the line 'blacklist mcp251x' to the '/etc/modprobe.d/blacklist.conf' file and rebooting the system.
No, at the time of this report, there is no known proof of concept or exploit available for this vulnerability. However, it is crucial to address the vulnerability promptly to mitigate any potential risks.
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