Vulnerability in comedi: dt9812 package - Fix for DMA buffers on stack
Summary
UVI-2021-1001948: comedi: dt9812: fix DMA buffers on stack. Affects Kernel versions >= 63274cd7d38a3322d90b66a5bc976de1fb899051, < 365a346cda82f51d835c49136a00a9df8a78c7f2. No fix is published. How to fix ↓
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Background
The comedi package is a Linux kernel driver framework for data acquisition and control systems. It provides a unified interface for various data acquisition hardware devices. One of the supported devices is the dt9812 module. This module allows users to perform data acquisition and control operations. However, a vulnerability has been discovered in the dt9812 module related to the handling of DMA buffers on the stack.
Vulnerability Detail
The vulnerability in the dt9812 module arises from the use of DMA buffers on the stack. DMA (Direct Memory Access) is a mechanism that allows hardware devices to directly access system memory without involving the CPU. In this case, the DMA buffers are allocated on the stack, which can lead to stack-based buffer overflows or other memory corruption issues. An attacker could potentially exploit this vulnerability to execute arbitrary code or crash the system. The vulnerability was introduced in version v2.6.29 of the Linux Kernel and has been fixed in version v4.9.290.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. It is advised to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
The comedi: dt9812 package is vulnerable to a DMA buffer issue on the stack, which can lead to memory corruption and potential code execution or system crashes. It is crucial to update the Linux Kernel to version v4.9.290 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Comedi is a Linux kernel driver framework for data acquisition and control systems. It provides a unified interface for various data acquisition hardware devices.
The dt9812 module is a supported device in the comedi package that allows users to perform data acquisition and control operations.
A DMA buffer is a region of memory that can be accessed by hardware devices directly without involving the CPU. It allows for efficient data transfer between devices and memory.
The vulnerability could potentially allow an attacker to execute arbitrary code or crash the system by exploiting stack-based buffer overflows or other memory corruption issues.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.290 or later, which includes the necessary fix for the dt9812 module.
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