netfilter: nf_tables: initialize registers in nft_do_chain() - Kernel
Summary
GSD-2022-1002458: netfilter: nf_tables: initialize registers in nft_do_chain(). Affects Kernel versions >= 96518518cc417bb0a8c80b9fb736202e28acdf96, < a3cc32863b175168283cb0a5fde08de6a1e27df9. 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. One of its components, nf_tables, provides a framework for configuring firewall rules and network packet processing. However, a vulnerability has been discovered in nf_tables that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in nf_tables arises from the failure to properly initialize registers in the nft_do_chain() function. This could lead to uninitialized memory being used, potentially resulting in information disclosure or arbitrary code execution. An attacker who can send specially crafted network packets to a vulnerable system may be able to exploit this vulnerability to gain unauthorized access, escalate privileges, or launch further attacks. The vulnerability was introduced in Linux Kernel version 3.13 and is fixed in version 4.14.274.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Kernel to the fixed version as soon as possible.
Conclusion
The vulnerability in nf_tables could allow attackers to gain unauthorized access, escalate privileges, or launch further attacks on affected systems. It is crucial to update the Linux Kernel to version 4.14.274 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could allow an attacker to gain unauthorized access, escalate privileges, or launch further attacks on a vulnerable system.
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 Vulert will analyze it for any known vulnerabilities.
At the time of this report, there is no known public exploit for this vulnerability. However, it is still crucial to apply the necessary updates to mitigate the risk.
Yes, this vulnerability can be exploited remotely by sending specially crafted network packets to a vulnerable system.
The only effective mitigation is to update the Kernel to the fixed version. It is recommended to do so as soon as possible.
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