netfilter: nf_tables: disallow non-stateful expression in sets earlier
Summary
GSD-2022-1003192: netfilter: nf_tables: disallow non-stateful expression in sets earlier. Affects Kernel versions >= 0b2d8a7b638b5034d2d68f6add8af94daaa1d4cd, < d8db0465bcc4d4b54ecfb67b820ed26eb1440da7. 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 the 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 bypass stateful packet inspection and potentially lead to unauthorized access or malicious activities. This vulnerability was introduced in version v4.1 of the Linux Kernel and has been fixed in version v5.17.13. 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
In conclusion, the nf_tables vulnerability in the Linux Kernel allows non-stateful expressions to be used in sets, potentially bypassing stateful packet inspection. It is recommended to update the Kernel to version v5.17.13 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially allow unauthorized access or malicious activities.
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 and it will provide real-time alerts for open-source vulnerabilities.
Yes, a patch is available in version v5.17.13 of the Linux Kernel. It is recommended to update to this version or later to fix the vulnerability.
There are no known exploits for this vulnerability at the moment.
You can find more information about this vulnerability in the GSD-2022-1003192.json file in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003192.json).
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