Vulnerability in Kernel: iio: dummy: iio_simple_dummy: check the return value of kstrdup()
Summary
GSD-2022-1003830: iio: dummy: iio_simple_dummy: check the return value of kstrdup(). Affects Kernel versions < 00a3e80fa4aa63ea7672ec7caaf1e9b14ba0a1b7. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities for the proper functioning of the system. The iio_simple_dummy module is part of the Industrial I/O (IIO) subsystem, which enables Linux to interface with various sensors and measurement devices. This module serves as a dummy driver for testing and development purposes.
Vulnerability Detail
The vulnerability in the iio_simple_dummy module arises from a failure to check the return value of the kstrdup() function. This function is used to allocate and copy a string in kernel space. By not verifying the return value, it is possible for an attacker to exploit this vulnerability and cause a NULL pointer dereference, leading to a kernel crash or potential privilege escalation. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid loading the iio_simple_dummy module if it is not required for their system. This can be achieved by blacklisting the module or removing it from the kernel configuration. However, it is recommended to apply the official fix by updating the Kernel.
Conclusion
The vulnerability in the iio_simple_dummy module of the Kernel can lead to a kernel crash or potential privilege escalation. It is crucial to update the Kernel to the latest stable version (v4.19.247 or later) to mitigate this vulnerability. Users can also use Vulert's playground at https://vulert.com/scanner to check if their system is affected by this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The iio_simple_dummy module is a dummy driver in the Linux Kernel's Industrial I/O (IIO) subsystem. It is used for testing and development purposes and does not provide any real sensor functionality.
The impact of this vulnerability can range from a kernel crash to potential privilege escalation. However, the actual impact and attack plausibility have not been proven yet.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
Yes, a workaround is available by avoiding the loading of the iio_simple_dummy module if it is not required for your system. This can be done by blacklisting the module or removing it from the kernel configuration.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.247 or later. This will ensure that the vulnerability is patched.
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