netfilter: nf_tables: initialize registers in nft_do_chain() - Kernel
Summary
GSD-2022-1001333: netfilter: nf_tables: initialize registers in nft_do_chain(). Affects Kernel versions >= 96518518cc417bb0a8c80b9fb736202e28acdf96, < dd03640529204ef4b8189fbdea08217d8d98271f. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and enforces security policies. The netfilter subsystem within the Kernel is responsible for packet filtering, network address translation, and other network-related operations. nf_tables is a component of netfilter that provides a framework for configuring firewall rules and packet classification. This vulnerability specifically affects the nf_tables module in the Kernel.
Vulnerability Detail
The vulnerability in nf_tables arises from uninitialized registers in the nft_do_chain() function. This can lead to unpredictable behavior and potential security issues. An attacker may be able to exploit this vulnerability to bypass firewall rules, manipulate packet filtering, or cause denial-of-service conditions. The impact and attack plausibility of this vulnerability have not been proven, but it is important to address it to ensure the integrity and 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. The recommended approach is to update the Kernel to the fixed version.
Conclusion
The nf_tables vulnerability in the Kernel can potentially lead to security issues and should be addressed by updating the Linux Kernel to version v5.17.1 or later. This ensures that the uninitialized registers in nft_do_chain() are properly initialized, mitigating the vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially allow attackers to bypass firewall rules, manipulate packet filtering, or cause denial-of-service conditions.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
There is no known exploit for this vulnerability at the moment. However, it is important to address it by updating the Kernel to the fixed version.
The recommended mitigation is to update the Linux Kernel to version v5.17.1 or later, which fixes the vulnerability.
You can refer to the source link provided in the database_specific section of the vulnerability details for more information about this vulnerability.
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