Vulnerability in Kernel: Staging: vchiq_core: Handle NULL Result of find_service_by_handle
Summary
GSD-2022-1001035: staging: vchiq_core: handle NULL result of find_service_by_handle. Affects Kernel versions < 3b424f6586a870b8d657c5e5419465bbe0e7b61f. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities, such as device drivers, memory management, and process scheduling. The vchiq_core module is part of the staging area in the Kernel, which contains drivers that are still under development or not fully supported. The vchiq_core module is responsible for managing communication between the host and VideoCore processors on Raspberry Pi devices. Unfortunately, a vulnerability has been discovered in the vchiq_core module that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the vchiq_core module arises from a failure to handle a NULL result when attempting to find a service by its handle. This could lead to a NULL pointer dereference, resulting in a kernel crash or potentially allowing an attacker to execute arbitrary code with kernel privileges. The impact and attack plausibility of this vulnerability have not been proven yet, but it is essential 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
As a temporary workaround, users can disable the vchiq_core module if it is not required for their system. This can be done by blacklisting the module or removing it from the Kernel configuration. However, this workaround should only be considered if the module is not essential for the system's functionality.
Conclusion
The vulnerability in the vchiq_core module of the Kernel poses a potential risk to the security and stability of the system. It is recommended to update the Kernel to the latest version to fix the vulnerability. In the meantime, if the vchiq_core module is not necessary, it can be temporarily disabled as a workaround. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could range from a kernel crash to potential execution of arbitrary code with kernel privileges.
You can use tools like Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert Playground allows you to analyze your manifest file, such as package-lock.json, without requiring access to the code or installation.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to address it promptly to mitigate any potential risks.
As a temporary workaround, you can disable the vchiq_core module if it is not necessary for your system. However, updating the Kernel to the latest version is the recommended solution.
You can refer to the Linux Kernel's official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) for more details about the fix and the vulnerability. Additionally, the vulnerability details can be found in the GSD Database maintained by the Cloud Security Alliance (https://github.com/cloudsecurityalliance/gsd-database).
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