Use-after-free vulnerability in usb: f_fs package
Summary
GSD-2022-1000500: usb: f_fs: Fix use-after-free for epfile. Affects Kernel versions >= a9e6f83c2df199187a5248f824f31b6787ae23ae, < 3e078b18753669615301d946297bafd69294ad2c. No fix is published. How to fix ↓
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Background
The usb: f_fs package is a component of the Linux Kernel, which is responsible for handling USB functionality. It provides the necessary drivers and protocols for USB devices to communicate with the operating system. The usb: f_fs package is widely used in Linux-based systems and is critical for proper USB device support.
Vulnerability Detail
The use-after-free vulnerability in the usb: f_fs package allows an attacker to exploit a freed memory region, leading to potential code execution or a system crash. This vulnerability occurs when the epfile (endpoint file) is accessed after it has been freed. An attacker can craft a malicious USB request that triggers this use-after-free condition, potentially leading to arbitrary code execution or denial of service.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable USB functionality or restrict USB device access to trusted sources only. However, this may impact the usability of the system and is not a recommended long-term solution. It is strongly advised to apply the official fix by updating the Linux Kernel.
Conclusion
The use-after-free vulnerability in the usb: f_fs package of the Linux Kernel can be exploited to execute arbitrary code or crash the system. It is crucial to update the Linux Kernel to version v5.16.10 or later to mitigate this vulnerability. Disabling USB functionality or restricting USB device access can serve as a temporary workaround, but it is recommended to apply the official fix. For further support, contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code or crash the system by exploiting the use-after-free condition in the usb: f_fs package.
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 and Vulert will analyze it for any known vulnerabilities.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if an attacker can send a malicious USB request to the affected system. It is important to update the Linux Kernel to the latest version to prevent remote exploitation.
For further support on vulnerability remediation and assistance with updating the Linux Kernel, you can contact info@devnack.com.
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