USB: dwc3: ep0: Fix NULL pointer exception in Linux Kernel
Summary
UVI-2021-1000845: usb: dwc3: ep0: fix NULL pointer exception. Affects Kernel versions < 60156089f07e724e4dc8483702d5e1ede4522749. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system. It provides essential functionality and interfaces for various hardware devices, including USB controllers. The dwc3 driver is responsible for managing USB 3.0 controllers. The ep0 endpoint is the control endpoint used for device initialization and configuration. However, a vulnerability in the dwc3 driver can lead to a NULL pointer exception in the ep0 endpoint, potentially causing system instability or crashes.
Vulnerability Detail
The vulnerability arises due to a NULL pointer exception in the dwc3 driver's ep0 endpoint. This can occur when handling certain USB requests, leading to a crash or system instability. An attacker may be able to exploit this vulnerability to cause a denial-of-service (DoS) condition or potentially execute arbitrary code with kernel-level privileges. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The USB: dwc3: ep0 NULL pointer exception vulnerability in the Linux Kernel can lead to system instability, crashes, or potential execution of arbitrary code with kernel-level privileges. It is crucial to update the Linux Kernel to version v4.9.273 or later to patch this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from system instability to crashes or even potential execution of arbitrary code with kernel-level privileges.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you in real-time if the vulnerability is present.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the latest version to ensure the vulnerability is patched.
The exact attack vector and exploitability of this vulnerability have not been proven yet. However, if an attacker can send malicious USB requests to the affected system, they may be able to trigger the vulnerability remotely.
There is no evidence of active exploits targeting this vulnerability at the moment. However, it is always recommended to apply security patches and updates promptly to mitigate potential risks.
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