Array Index Out-of-Bounds in pvr2_i2c_core_init
Summary
GSD-2022-1003902: media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init. Affects Kernel versions >= d855497edbfbf9e19a17f4a1154bca69cb4bd9ba, < a3660e06675bccec4bf149c7229ea1d491ba10d7. No fix is published. How to fix ↓
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Background
The pvrusb2 driver is a part of the Linux Kernel, which is responsible for supporting Pinnacle PCTV USB devices. It provides functionality for capturing video and audio from these devices. The pvr2_i2c_core_init function is a core initialization function within the pvrusb2 driver that handles the initialization of the I2C subsystem for communication with the PCTV USB devices.
Vulnerability Detail
The vulnerability identified in the pvr2_i2c_core_init function is an array index out-of-bounds issue. This occurs when the function attempts to access an array element beyond its bounds. An attacker can potentially exploit this vulnerability by providing malicious input that triggers the out-of-bounds access, leading to various consequences such as memory corruption, system crashes, or even remote code execution. The vulnerability was introduced in version 2.6.18 of the Linux Kernel and has been fixed in version 4.19.247.
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 pvrusb2 driver if it is not required for their system. This can be done by blacklisting the driver module or removing it from the Kernel configuration. However, this workaround should only be considered if the driver is not essential for system functionality.
Conclusion
The array index out-of-bounds vulnerability in the pvr2_i2c_core_init function of the pvrusb2 driver can potentially lead to memory corruption, system crashes, or remote code execution. It is crucial to update the Linux Kernel to version 4.19.247 or later to mitigate this vulnerability. Alternatively, users can consider disabling or removing the pvrusb2 driver if it is not necessary for their system. For further assistance and support, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific system configuration and the attacker's capabilities. It could potentially lead to memory corruption, system crashes, or remote code execution.
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 application's manifest file, such as package-lock.json, and provides real-time alerts for open-source vulnerabilities.
At the time of this report, there is no known public exploit for this vulnerability. However, it is always recommended to apply security patches and updates to mitigate potential risks.
While updating the Linux Kernel is the recommended approach, you can consider disabling or removing the pvrusb2 driver if it is not essential for your system. However, this should only be done after careful consideration of the impact on system functionality.
You can find more information about this vulnerability in the Linux Kernel security advisories and the associated commit history. Additionally, you can reach out to info@devnack.com for further support on vulnerability remediation.
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