netfilter: nf_tables: disallow non-stateful expression in sets earlier
Summary
GSD-2022-1004024: netfilter: nf_tables: disallow non-stateful expression in sets earlier. Affects Kernel versions >= 0b2d8a7b638b5034d2d68f6add8af94daaa1d4cd, < 5b732a9e8e22395d911b3e6c343cbed0e1cec275. No fix is published. How to fix ↓
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Background
The vulnerability affects the Kernel package in the Linux ecosystem. The Kernel is the core component of the operating system that manages system resources and provides an interface for applications to interact with hardware. It includes various subsystems, including netfilter, which is responsible for packet filtering and network address translation. The nf_tables module within netfilter allows users to define firewall rules and manipulate network packets. However, a vulnerability has been discovered in nf_tables that allows non-stateful expressions to be used in sets, which can lead to potential security issues.
Vulnerability Detail
The vulnerability in nf_tables allows non-stateful expressions to be used in sets, which can have unintended consequences. Non-stateful expressions are those that do not consider the state of the network connection, such as the source or destination IP address. By allowing non-stateful expressions in sets, an attacker could potentially bypass firewall rules or manipulate network packets in unexpected ways. The impact and attack plausibility of this vulnerability have not been proven yet, but it is important to address it to ensure the security of the system.
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 vulnerability in nf_tables that allows non-stateful expressions in sets can have potential security implications. It is recommended 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
nf_tables is a subsystem within netfilter that allows users to define firewall rules and manipulate network packets.
A non-stateful expression is one that does not consider the state of the network connection, such as the source or destination IP address.
Allowing non-stateful expressions in sets can potentially bypass firewall rules or manipulate network packets in unexpected ways.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v4.14.283 or later.
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