Use After Free Vulnerability in net: macb
Summary
GSD-2021-1001544: net: macb: fix use after free on rmmod. Affects Kernel versions < a7d521cc726f30b8e679a6f36d04b18a8ab3c536. No fix is published. How to fix ↓
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Background
The net: macb package is a network driver for the MACB Ethernet controller. It is a part of the Linux Kernel, which is responsible for managing the core functionality of the operating system. The MACB Ethernet controller is commonly used in embedded systems and provides Ethernet connectivity. The vulnerability in net: macb allows for a use after free scenario when the module is removed from the system.
Vulnerability Detail
The use after free vulnerability in net: macb occurs when the module is unloaded from the system. This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial of service. The vulnerability arises due to improper handling of resources during the removal process, leading to a use after free scenario. An attacker can trigger this vulnerability by unloading the net: macb module, causing the system to access freed memory. This can result in a crash or allow the attacker to execute malicious code.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk of exploitation.
Conclusion
The use after free vulnerability in net: macb can be mitigated by updating the Linux Kernel to the fixed version. It is crucial to apply the recommended fix to ensure the security and stability of the system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
net: macb is a network driver for the MACB Ethernet controller, commonly used in embedded systems.
A use after free vulnerability occurs when a program continues to use a memory resource after it has been freed, leading to potential crashes or the execution of arbitrary code.
An attacker can exploit this vulnerability by unloading the net: macb module, causing the system to access freed memory. This can result in a crash or allow the attacker to execute malicious code.
No, there is no known workaround for this vulnerability. Updating the Linux Kernel to the fixed version is the recommended solution.
To fix this vulnerability, update the Linux Kernel to version v4.14.249 or later, which includes the fix for the use after free vulnerability in net: macb.
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