usbnet: Sanity Check for maxpacket in Linux Kernel
Summary
GSD-2021-1001963: usbnet: sanity check for maxpacket. Affects Kernel versions < 74b3b27cf9fecce00cd8918b7882fd81191d0aa4. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Linux Kernel is the core component of the Linux operating system. It provides essential services and functions for the proper functioning of the system. The usbnet module in the Linux Kernel is responsible for handling USB network devices. It allows devices to communicate over USB as if they were traditional network interfaces. The maxpacket parameter in usbnet is used to specify the maximum packet size that can be sent or received by the device. This vulnerability relates to a missing sanity check for the maxpacket value, which could lead to potential security issues.
Vulnerability Detail
The vulnerability in usbnet arises from the absence of a sanity check for the maxpacket value. Without this check, an attacker could potentially manipulate the maxpacket value to cause buffer overflows or other memory-related vulnerabilities. This could lead to arbitrary code execution, privilege escalation, or denial of service attacks. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v4.14.254 by commit 74b3b27cf9fecce00cd8918b7882fd81191d0aa4.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Conclusion
The usbnet module in the Linux Kernel is vulnerable to a missing sanity check for the maxpacket value. This vulnerability could potentially lead to serious security issues, including arbitrary code execution and privilege escalation. It is crucial to update the Linux Kernel to version v4.14.254 or later to fix this vulnerability. Regularly updating the Kernel is essential to ensure the system is protected against the latest security threats. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The usbnet module in the Linux Kernel allows USB devices to communicate over USB as if they were traditional network interfaces. It enables the use of USB network devices such as USB Ethernet adapters.
The maxpacket parameter in usbnet is used to specify the maximum packet size that can be sent or received by the USB network device. It determines the efficiency and performance of data transfer over the USB connection.
A sanity check is a validation process that ensures the input or configuration values are within expected bounds and do not pose any security risks. It helps prevent potential vulnerabilities and ensures the system operates as intended.
The potential consequences of this vulnerability include arbitrary code execution, privilege escalation, and denial of service attacks. An attacker could exploit this vulnerability to manipulate the maxpacket value and cause buffer overflows or other memory-related vulnerabilities.
Yes, this vulnerability has been fixed in Linux Kernel version v4.14.254 by commit 74b3b27cf9fecce00cd8918b7882fd81191d0aa4. It is recommended to update the Kernel to the fixed version or later to mitigate the risk.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
