Array Index Out-of-Bounds Vulnerability in media: pvrusb2
Summary
GSD-2022-1003091: media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init. Affects Kernel versions >= d855497edbfbf9e19a17f4a1154bca69cb4bd9ba, < f99a8b1ec0eddc2931aeaa4f490277a15b39f511. No fix is published. How to fix ↓
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Background
The media package in the Linux Kernel provides support for various media devices, including video capture cards. One such device is pvrusb2, which is used for capturing video from Pinnacle PCTV USB devices. The pvrusb2 driver in the media package handles the initialization of the I2C subsystem for these devices. However, a vulnerability exists in the pvr2_i2c_core_init function, which can lead to an array index out-of-bounds error.
Vulnerability Detail
The array index out-of-bounds vulnerability in pvr2_i2c_core_init occurs when accessing an array without proper bounds checking. An attacker could exploit this vulnerability by sending specially crafted input to the affected system, potentially leading to memory corruption or arbitrary code execution. The impact of this vulnerability depends on the attacker's ability to trigger the vulnerable code path and the system's overall security posture.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable or unload the pvrusb2 driver if it is not required for their system. This can be done by executing the following command as root:
modprobe -r pvrusb2
However, this workaround should only be considered temporary, as it may impact the functionality of Pinnacle PCTV USB devices.
Conclusion
In conclusion, the media package in the Linux Kernel is vulnerable to an array index out-of-bounds issue in the pvr2_i2c_core_init function. This vulnerability can be mitigated by updating to Linux Kernel version v5.17.14 or later. Users can also consider temporarily disabling the pvrusb2 driver, although this may impact the functionality of Pinnacle PCTV USB devices. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability depends on the attacker's ability to trigger the vulnerable code path and the system's overall security posture. It could potentially lead to memory corruption or arbitrary code execution.
You can use the Vulert Playground at Vulert 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 one.
Yes, a patch for this vulnerability is available in the Linux Kernel version v5.17.14. It is recommended to update to this version or later to fix the vulnerability.
Yes, you can disable or unload the pvrusb2 driver as a temporary workaround. However, this may impact the functionality of Pinnacle PCTV USB devices.
You can obtain the updated Linux Kernel from the official Linux Kernel repository or your respective Linux distribution's package manager. Make sure to update to version v5.17.14 or later.
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