netfilter: conntrack: serialize hash resizes and cleanups
Summary
GSD-2021-1001636: netfilter: conntrack: serialize hash resizes and cleanups. Affects Kernel versions < e2d192301a0df8160d1555b66ae8611e8050e424. No fix is published. How to fix ↓
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Background
The netfilter conntrack module is a component of the Linux Kernel that provides connection tracking capabilities for network traffic. It maintains a hash table to store information about active connections, such as source and destination IP addresses, ports, and protocol. This module is crucial for firewall functionality and network security.
Vulnerability Detail
The vulnerability in the netfilter conntrack module allows an attacker to exploit hash resizes and cleanups. This can potentially lead to various security issues, such as denial-of-service attacks, information leaks, or even remote code execution. By manipulating the hash table, an attacker can disrupt the normal operation of the firewall and bypass security measures.
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. However, applying the recommended fix by updating the Linux Kernel is the best course of action to mitigate the risk.
Conclusion
The netfilter conntrack vulnerability related to hash resizes and cleanups poses significant risks to the security and integrity of the network. It is crucial to update the Linux Kernel to version v5.10.71 or later to address this vulnerability. For further support and assistance in vulnerability remediation, you can contact DevNack.com.
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FAQ
This vulnerability can lead to various security issues, including denial-of-service attacks, information leaks, and potential remote code execution. It can compromise the integrity and security of the network.
By manipulating the hash table used by the netfilter conntrack module, an attacker can disrupt the normal operation of the firewall and potentially bypass security measures. This can be done by triggering hash resizes and cleanups in a malicious manner.
At the time of this report, there is no known proof-of-concept or exploit publicly available for this vulnerability. However, it is important to apply the recommended fix to prevent any potential exploitation.
The vulnerability is present in versions of the Linux Kernel prior to v5.10.71. It is recommended to update to this version or later to address the vulnerability.
For more details about this vulnerability, you can refer to the source link provided in the database_specific section of this report.
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