Use-after-free vulnerability in spi: stm32 package
Summary
GSD-2021-1000391: spi: stm32: Fix use-after-free on unbind. Affects Kernel versions >= 0390f6f1d0bcd36d0ab22367498cc2c4619c05d8, < 05b3f9b0ac32fb3714efa13270700868b3000019. No fix is published. How to fix ↓
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Background
The spi: stm32 package is a component of the Linux Kernel, which is responsible for handling SPI (Serial Peripheral Interface) communication on STM32 microcontrollers. SPI is a synchronous serial communication interface commonly used for connecting microcontrollers to peripheral devices. The spi: stm32 package provides the necessary drivers and functionality for SPI communication on STM32-based systems.
Vulnerability Detail
The use-after-free vulnerability in spi: stm32 occurs when the package fails to properly handle the unbind operation. This can lead to a situation where a reference to a freed memory object is still accessible, potentially allowing an attacker to exploit this situation and execute arbitrary code or cause a denial of service. The vulnerability was introduced in version v5.10.37 of the Linux Kernel and has been fixed in version v5.10.37 by commit 05b3f9b0ac32fb3714efa13270700868b3000019.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid the unbind operation that triggers the use-after-free vulnerability. However, this may not be a feasible solution in all cases, as it may limit the functionality or performance of the spi: stm32 package. It is strongly recommended to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The use-after-free vulnerability in spi: stm32 can pose a significant security risk, potentially allowing attackers to execute arbitrary code or cause a denial of service. It is crucial to update the Linux Kernel to version v5.10.37 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The spi: stm32 package is a component of the Linux Kernel that provides drivers and functionality for SPI communication on STM32 microcontrollers.
A use-after-free vulnerability occurs when a program continues to use a memory object after it has been freed. This can lead to various security issues, including the execution of arbitrary code or denial of service.
You can use Vulert's playground (https://vulert.com/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 use-after-free vulnerability in spi: stm32.
Yes, this vulnerability has been fixed in version v5.10.37 of the Linux Kernel by commit 05b3f9b0ac32fb3714efa13270700868b3000019.
To protect your system, it is recommended to update the Linux Kernel to version v5.10.37 or later, which includes the fix for this vulnerability. Follow the provided steps in the 'how_to_fix' section to update your kernel.
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