Use-after-free vulnerability in net/tls package in Linux Kernel
Summary
UVI-2021-1000765: net/tls: Fix use-after-free after the TLS device goes down and up. Affects Kernel versions >= e8f69799810c32dd40c6724d829eccc70baad07f, < f1d4184f128dede82a59a841658ed40d4e6d3aa2. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system. It provides essential services and functions to enable the proper functioning of the system. The net/tls package in the Linux Kernel is responsible for handling Transport Layer Security (TLS) connections. TLS is a cryptographic protocol used to secure communication over a network. It ensures the confidentiality and integrity of data exchanged between two endpoints. However, a use-after-free vulnerability has been discovered in the net/tls package, which can lead to security issues.
Vulnerability Detail
The use-after-free vulnerability in the net/tls package occurs when the TLS device goes down and then comes back up. This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability is introduced in version v4.18 of the Linux Kernel and is fixed in version v5.10.43. 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 specific workaround mentioned for this vulnerability.
Conclusion
The use-after-free vulnerability in the net/tls package of the Linux Kernel can have serious security implications. It is crucial to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The net/tls package in the Linux Kernel is responsible for handling Transport Layer Security (TLS) connections. It ensures secure communication over a network.
A use-after-free vulnerability occurs when a program or system continues to use a memory address after it has been freed. This can lead to various security issues, including arbitrary code execution or denial-of-service.
The use-after-free vulnerability in the net/tls package can be exploited by an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition. However, the impact and attack plausibility of this vulnerability have not been proven yet.
This vulnerability is introduced in version v4.18 of the Linux Kernel. Versions prior to v4.18 are also likely to be affected.
To protect your system from this vulnerability, it is recommended to update the Linux Kernel to version v5.10.43 or later. This update includes the necessary patch to address the use-after-free issue in the net/tls package.
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