netfilter: nf_tables: initialize registers in nft_do_chain()
Summary
GSD-2022-1002287: netfilter: nf_tables: initialize registers in nft_do_chain(). Affects Kernel versions >= 96518518cc417bb0a8c80b9fb736202e28acdf96, < 06f0ff82c70241a766a811ae1acf07d6e2734dcb. 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 software to interact with hardware. The specific vulnerability is related to the nf_tables module, which is responsible for packet filtering and manipulation in netfilter. The nf_tables module is used by various firewall and network management tools. The vulnerability allows uninitialized registers in the nft_do_chain() function, potentially leading to security issues.
Vulnerability Detail
The vulnerability in nf_tables arises from uninitialized registers in the nft_do_chain() function. This can result in unpredictable behavior and potential security vulnerabilities. Attackers may be able to exploit this vulnerability to bypass firewall rules, manipulate network traffic, or gain unauthorized access to systems. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in Linux Kernel version v3.13 and is fixed in version v5.4.188 by commit 06f0ff82c70241a766a811ae1acf07d6e2734dcb.
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 Kernel package can lead to potential security issues due to uninitialized registers in the nft_do_chain() function. It is recommended to update the Linux Kernel to version v5.4.188 or later to fix the 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 attackers to bypass firewall rules, manipulate network traffic, or gain unauthorized access to systems.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. It does not require any signup and uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities.
Yes, the vulnerability is fixed in Linux Kernel version v5.4.188. It is recommended to update the Kernel to this version or later to mitigate the vulnerability.
The remote exploitability of this vulnerability is not yet proven. However, it is always recommended to apply security patches and updates to mitigate potential risks.
There are no known instances of this vulnerability being exploited at the moment. However, it is important to stay updated with security patches and follow best practices to minimize the risk of exploitation.
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