netfilter: nf_tables: disallow non-stateful expression in sets earlier
Summary
GSD-2022-1003814: netfilter: nf_tables: disallow non-stateful expression in sets earlier. Affects Kernel versions >= 0b2d8a7b638b5034d2d68f6add8af94daaa1d4cd, < f36736fbd48491a8d85cd22f4740d542c5a1546e. No fix is published. How to fix ↓
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Background
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel. It provides the core functionality for the Linux operating system. The nf_tables module is a subsystem within the Linux Kernel that provides a packet filtering framework. It allows users to define firewall rules and perform network address translation (NAT). This vulnerability affects the nf_tables module in the Linux Kernel.
Vulnerability Detail
The vulnerability in the nf_tables module allows non-stateful expressions to be used in sets. This can lead to potential security issues as non-stateful expressions can bypass firewall rules and allow unauthorized access to the system. The vulnerability was introduced in version 4.1 of the Linux Kernel and was fixed in version 5.4.198. 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 nf_tables vulnerability in the Linux Kernel can potentially allow unauthorized access to a system by bypassing firewall rules. It is important to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The nf_tables module is a subsystem within the Linux Kernel that provides a packet filtering framework. It allows users to define firewall rules and perform network address translation (NAT).
A non-stateful expression is a type of expression that does not take into account the state of a connection. It can be used to bypass firewall rules and potentially allow unauthorized access to a system.
You can check the version of the Linux Kernel by running the command 'uname -r' in a terminal.
There are no known exploits for this vulnerability at the moment. However, it is important to update the Linux Kernel to the latest version to ensure the system is protected against potential exploits.
You can find more information about the Linux Kernel and its vulnerabilities on the official website of the Linux Kernel and security advisories published by the Linux distribution you are using.
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