Vulnerability in Kernel: media: ir_toy: free before error exiting
Summary
GSD-2022-1001462: media: ir_toy: free before error exiting. Affects Kernel versions < 382e0f6958ef34eb093127b6d74c12f3b8fd0904. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities and services to ensure the proper functioning of the system. One of the features supported by the Kernel is media, which includes various media devices and drivers. The ir_toy module is a part of the media subsystem and is responsible for handling infrared (IR) communication. It allows users to interact with IR devices, such as remote controls. However, a vulnerability has been discovered in the ir_toy module that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the ir_toy module arises from a memory management issue. Specifically, there is a scenario where memory is freed before properly handling an error condition, leading to a use-after-free vulnerability. An attacker could potentially trigger this vulnerability by sending specially crafted input to the ir_toy module, causing it to free memory prematurely. If successfully exploited, this vulnerability could result in a variety of consequences, including system crashes, privilege escalation, or arbitrary code execution. It is important to note that 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 disable or remove the ir_toy module from their Kernel configuration if it is not required for their system's functionality. This can be achieved by modifying the Kernel configuration file and rebuilding the Kernel without including the ir_toy module. However, it is recommended to apply the official fix by updating the Kernel to a version that includes the fix.
Conclusion
In conclusion, a vulnerability has been identified in the ir_toy module of the Kernel, which could potentially be exploited by attackers. The vulnerability has been fixed in the Linux Kernel version v5.16.19 through commit 382e0f6958ef34eb093127b6d74c12f3b8fd0904. Users are advised to update their Kernel to this version or a later one that includes the fix. Alternatively, users can disable or remove the ir_toy module from their Kernel configuration as a temporary workaround. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can vary and depends on the attacker's capabilities and intentions. Possible consequences include system crashes, privilege escalation, or arbitrary code execution.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
Yes, a patch has been released in the Linux Kernel version v5.16.19. Users should update their Kernel to this version or a later one that includes the fix.
As a temporary workaround, you can disable or remove the ir_toy module from your Kernel configuration if it is not required for your system's functionality. However, it is recommended to apply the official fix by updating the Kernel to a version that includes the fix.
You can refer to the vulnerability details in the Open Source Vulnerability format provided by the Cloud Security Alliance's GSD database. The details include the vulnerability ID, affected package, fix version, and references for further information.
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