UAF in tlan_remove_one in Kernel
Summary
GSD-2021-1001321: net: ti: fix UAF in tlan_remove_one. Affects Kernel versions >= 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, < b7e5563f2a7862a9e4796abb9908b092f677e3c1. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The tlan_remove_one function in the Kernel's network subsystem is responsible for removing a network device. However, a use-after-free (UAF) vulnerability has been discovered in tlan_remove_one, which could potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
Vulnerability Detail
The UAF vulnerability in tlan_remove_one arises from improper handling of network device removal. When a network device is removed, the tlan_remove_one function fails to properly release the corresponding resources, leading to a use-after-free condition. An attacker could exploit this vulnerability by triggering the removal of a network device and then manipulating the freed memory to execute arbitrary code or disrupt the system's normal operation. The impact and attack plausibility of this vulnerability have not been proven, but it is crucial to address it to ensure the security and stability of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. It is advised to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
The UAF vulnerability in tlan_remove_one in the Kernel poses a potential risk of arbitrary code execution or DoS attacks. It is recommended to update the Linux Kernel to version v5.4.135 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 could potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the Vulert Playground will provide real-time alerts for open-source vulnerabilities, including this one.
There is no known exploit for this vulnerability at the moment. However, it is important to apply the recommended fix to mitigate the risk.
The remote exploitability of this vulnerability has not been proven. However, it is still crucial to address it to ensure the security and stability of the system.
The specific prerequisites for exploiting this vulnerability have not been disclosed. However, it is always recommended to keep software and systems up to date to minimize the risk of exploitation.
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