Vulnerability in comedi: dt9812 package - Fix DMA buffers on stack
Summary
GSD-2021-1001993: comedi: dt9812: fix DMA buffers on stack. Affects Kernel versions >= 63274cd7d38a3322d90b66a5bc976de1fb899051, < 39ea61037ae78f14fa121228dd962ea3280eacf3. No fix is published. How to fix ↓
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Background
The comedi package is a Linux kernel driver framework that provides a unified interface for various data acquisition and control devices. It allows user-space applications to interact with these devices through a consistent API. The dt9812 driver is a specific driver within the comedi package that supports the DT9812 USB data acquisition device. This device is commonly used in industrial and scientific applications for data acquisition and control tasks.
Vulnerability Detail
The vulnerability in the dt9812 driver involves the use of DMA (Direct Memory Access) buffers on the stack. DMA is a technique used to transfer data between devices and memory without involving the CPU. In this case, the driver incorrectly allocates DMA buffers on the stack, which can lead to stack overflow vulnerabilities. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition on the affected system. The vulnerability was introduced in version v2.6.29 of the Linux Kernel and has been fixed in version v4.19.217.
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.
Conclusion
The vulnerability in the comedi dt9812 driver that allowed for DMA buffers on the stack has been fixed in the Linux Kernel version v4.19.217. It is crucial to update the kernel to ensure the security and stability of the system. 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 devices.
The dt9812 driver is a specific driver within the comedi package that supports the DT9812 USB data acquisition device.
DMA (Direct Memory Access) is a technique used to transfer data between devices and memory without involving the CPU.
A stack overflow vulnerability occurs when a program allocates more data on the stack than it can handle, leading to a memory corruption issue.
To update the Linux Kernel, you can download the latest stable version from the official repository and follow the installation instructions provided.
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