Use-after-free vulnerability in aio package
Summary
GSD-2021-1002462: aio: fix use-after-free due to missing POLLFREE handling. Affects Kernel versions >= 2c14fa838cbefc23cf1c73ca167ed85b274b2913, < 4105e6a128e8a98455dfc9e6dbb2ab0c33c4497f. No fix is published. How to fix ↓
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Background
The aio package is a component of the Linux Kernel, which provides support for asynchronous I/O operations. It allows applications to perform I/O operations without blocking the execution of other tasks. The package is an integral part of the Linux Kernel and is widely used in various Linux distributions.
Vulnerability Detail
The identified vulnerability in the aio package is a use-after-free issue caused by missing POLLFREE handling. This vulnerability can be exploited by an attacker to manipulate memory after it has been freed, potentially leading to arbitrary code execution or a system crash. The vulnerability was introduced in version v4.18 of the Linux Kernel and was fixed in version v5.4.165 by commit 4105e6a128e8a98455dfc9e6dbb2ab0c33c4497f.
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 v5.4.165 or later. This can be done by applying the relevant patches or upgrading the Linux Kernel package on the affected system. It is important to ensure that the updated version is compatible with the system and any associated software.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The use-after-free vulnerability in the aio package of the Linux Kernel can pose a significant security risk. It is crucial to update the Linux Kernel to the fixed version to mitigate the vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The use-after-free vulnerability in the aio package can potentially allow an attacker to execute arbitrary code or crash the system.
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 to the playground and it will analyze and alert you if the vulnerability is present.
At the time of this report, there are no known public exploits for this vulnerability. However, it is important to apply the necessary updates to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the affected system is exposed to the internet and the necessary conditions for exploitation are met.
For more details about this vulnerability, you can refer to the source link provided in the vulnerability details section.
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