UAF in tlan_remove_one in Kernel
Summary
GSD-2021-1001471: net: ti: fix UAF in tlan_remove_one. Affects Kernel versions >= 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, < a18a8d9cfbb112ad72e625372849adc3986fd6bf. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core functionalities and manages system resources. It acts as an interface between the hardware and software layers, allowing applications to communicate with the underlying hardware. The tlan_remove_one function in the Kernel's networking subsystem is responsible for removing a network device. However, a use-after-free (UAF) vulnerability exists in this function, which can lead to potential security risks.
Vulnerability Detail
The UAF vulnerability in tlan_remove_one arises from improper handling of network device removal. An attacker could exploit this vulnerability by triggering the removal of a network device while it is still in use, leading to a use-after-free condition. This could potentially allow the attacker to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability was introduced in version v3.10 of the Linux Kernel and has been fixed in version v4.4.277.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround available for this vulnerability. However, as a general security best practice, it is recommended to follow proper network device management procedures and ensure that devices are not removed while still in use.
Conclusion
The UAF vulnerability in tlan_remove_one in the Kernel can pose significant security risks, allowing an attacker to execute arbitrary code or cause a DoS condition. It is crucial to update the Linux Kernel to version v4.4.277 or later to mitigate this vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The UAF vulnerability in tlan_remove_one can potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
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Yes, the UAF vulnerability in tlan_remove_one has been fixed in version v4.4.277 of the Linux Kernel. It is recommended to update to this version or later to mitigate the vulnerability.
At the time of this report, there are no known public exploits specifically targeting this UAF vulnerability in tlan_remove_one. However, it is important to apply the necessary security updates to protect against potential future exploits.
You can find more information about this vulnerability, including the specific commits that fix it, in the vulnerability database entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001471.json.
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