Use-after-free vulnerability in rtl8712_dl_fw function in Kernel
Summary
GSD-2021-1002139: staging: rtl8712: fix use-after-free in rtl8712_dl_fw. Affects Kernel versions >= 8c213fa59199f9673d66970d6940fa093186642f, < befd23bd3b17f1a3f9c943a8580b47444c7c63ed. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The rtl8712_dl_fw function is part of the staging subsystem in the Kernel and is responsible for downloading firmware for Realtek RTL8712U wireless devices. This function is vulnerable to a use-after-free flaw.
Vulnerability Detail
The use-after-free vulnerability in the rtl8712_dl_fw function allows an attacker to exploit a freed memory region, potentially leading to arbitrary code execution or a system crash. This vulnerability was introduced in version v3.3 of the Linux Kernel by commit 8c213fa59199f9673d66970d6940fa093186642f and was fixed in version v5.14.18 by commit befd23bd3b17f1a3f9c943a8580b47444c7c63ed. 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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Workaround
There is no known workaround for this vulnerability.
Conclusion
The use-after-free vulnerability in the rtl8712_dl_fw function of the Kernel poses a potential security risk. It is recommended to update the Kernel to version v5.14.18 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the attacker's capabilities and the system's configuration. It could potentially lead to arbitrary code execution or a system crash.
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 and the Vulert Playground will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there are no known public exploits for this vulnerability. However, it is always recommended to apply security patches promptly to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the attacker can send malicious packets to a vulnerable system.
There is no evidence of active exploitation of this vulnerability at the time of this report. However, it is important to stay vigilant and apply security patches as soon as they become available.
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