Vulnerability in Kernel package: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()
Summary
GSD-2022-1003311: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan(). Affects Kernel versions >= 2b42bd58b32155a1be4dd78991845dec05aaef9e, < ac2eab7de458f5e1210ce1237afab40a307075c8. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and interfaces for various hardware devices and software components. The staging subsystem within the Kernel is used for developing and testing new drivers before they are fully integrated. The r8188eu driver is part of the staging subsystem and is responsible for supporting Realtek RTL8188EU wireless devices. This driver includes the rtw_wx_set_scan() function, which is used to set the wireless network scan parameters. However, a vulnerability exists in this function that can lead to a buffer overflow when handling the SSID (Service Set Identifier) parameter.
Vulnerability Detail
The vulnerability in the rtw_wx_set_scan() function of the r8188eu driver allows an attacker to trigger a buffer overflow by providing a specially crafted SSID. This can potentially lead to arbitrary code execution or a denial of service condition. The vulnerability was introduced in version v5.15 of the Linux Kernel and was fixed in version v5.15.46. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.46 or later. This update includes the necessary patch to prevent the buffer overflow in the rtw_wx_set_scan() function. Users can obtain the updated Kernel from the official Linux Kernel repository or through their Linux distribution's package manager.
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Workaround
As a workaround, users can disable the affected wireless device or remove the r8188eu driver from the staging subsystem. This can be done by blacklisting the driver module or modifying the Kernel configuration to exclude the staging subsystem. However, it is strongly advised to apply the official fix by updating the Kernel to ensure the long-term security and stability of the system.
Conclusion
The vulnerability in the rtw_wx_set_scan() function of the r8188eu driver in the Kernel package can lead to a buffer overflow, potentially resulting in arbitrary code execution or a denial of service condition. It is recommended to update the Linux Kernel to version v5.15.46 or later to fix this vulnerability. Users can also use tools like Vulert Playground to check if their system is affected. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from arbitrary code execution to a denial of service condition. However, the actual impact and attack plausibility have not been proven yet.
You can use tools like Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert Playground allows you to analyze your application's manifest file, such as package-lock.json, without requiring access to the code or installation.
Yes, a temporary fix is available by disabling the affected wireless device or removing the r8188eu driver from the staging subsystem. However, it is recommended to apply the official fix by updating the Kernel to ensure long-term security.
You can obtain the updated Linux Kernel from the official Linux Kernel repository or through your Linux distribution's package manager. Make sure to update to version v5.15.46 or later.
As of now, there are no known exploits for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
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