usbnet: Sanity Check for maxpacket Vulnerability in Linux Kernel
Summary
GSD-2021-1002121: usbnet: sanity check for maxpacket. Affects Kernel versions < 7e8b6a4f18edee070213cb6a77118e8a412253c5. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. The usbnet module in the Linux Kernel enables USB networking functionality, allowing devices to communicate over USB connections.
The vulnerability identified in the usbnet module relates to a missing sanity check for the maxpacket value. This value represents the maximum packet size that can be sent or received over USB. Without proper validation, an attacker could potentially exploit this vulnerability to cause buffer overflows, leading to arbitrary code execution or denial of service attacks.
Vulnerability Detail
The vulnerability arises from the absence of a sanity check for the maxpacket value in the usbnet module of the Linux Kernel. This oversight allows an attacker to manipulate the maxpacket value, potentially leading to buffer overflows and subsequent arbitrary code execution or denial of service attacks. The impact of this vulnerability depends on the attacker's ability to send specially crafted USB packets to the target system.
It is important to note that the actual impact and attack plausibility of this vulnerability have not yet been proven. However, it is crucial to address this issue to ensure the security and stability of systems running the affected Linux Kernel versions.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The usbnet: Sanity Check for maxpacket vulnerability in the Linux Kernel poses a potential risk of arbitrary code execution or denial of service attacks. It is crucial to update the Linux Kernel to version v5.14.16 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the attacker's ability to send specially crafted USB packets. It could potentially lead to arbitrary code execution or denial of service attacks.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities, including this one.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the latest stable version to address the issue.
Yes, this vulnerability is fixed in Linux Kernel version v5.14.16. Updating to this version or any subsequent version will resolve the issue.
You can find more information about this vulnerability in the GSD-2021-1002121 JSON report available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002121.json.
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