Vulnerability in comedi: vmk80xx
Summary
GSD-2021-1001930: comedi: vmk80xx: fix transfer-buffer overflows. Affects Kernel versions >= 985cafccbf9b7f862aa1c5ee566801e18b5161fb, < 5229159f1d052821007aff1a1beb7873eacf1a9f. 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. One of the drivers in this package is vmk80xx, which is responsible for handling communication with VMK-80xx series devices. These devices are used for data acquisition and control in industrial applications. The vmk80xx driver allows users to read and write data to these devices through a transfer buffer.
The vulnerability in the vmk80xx driver involves transfer-buffer overflows. When data is transferred to or from the device, the driver does not properly validate the size of the transfer buffer, which can lead to buffer overflows. An attacker could exploit this vulnerability by sending specially crafted data to the device, potentially causing a denial-of-service condition or arbitrary code execution.
Vulnerability Detail
The vulnerability in the comedi: vmk80xx driver is caused by transfer-buffer overflows. These overflows occur when the driver does not properly validate the size of the transfer buffer. An attacker can exploit this vulnerability by sending data that exceeds the buffer size, leading to a buffer overflow. This can result in a variety of consequences, including crashing the system, executing arbitrary code, or gaining elevated privileges.
The vulnerability was introduced in version v2.6.31 of the Linux Kernel by commit 985cafccbf9b7f862aa1c5ee566801e18b5161fb. It has been fixed in version v4.4.292 by commit 5229159f1d052821007aff1a1beb7873eacf1a9f.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to update to the latest version of the Linux Kernel as soon as possible.
Conclusion
The comedi: vmk80xx driver in the Linux Kernel is vulnerable to transfer-buffer overflows. This can be exploited by an attacker to cause a denial-of-service condition or execute arbitrary code. It is crucial to update to the latest version of the Linux Kernel 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 devices.
vmk80xx is a driver in the comedi package that handles communication with VMK-80xx series devices.
A transfer buffer is a temporary storage area used for transferring data between the driver and the device.
The consequences of this vulnerability can include system crashes, arbitrary code execution, or privilege escalation.
To fix this vulnerability, update your Linux Kernel to version v4.4.292 or later.
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