netfilter: nf_tables: hold mutex on netns pre_exit path
Summary
GSD-2022-1003456: netfilter: nf_tables: hold mutex on netns pre_exit path. Affects Kernel versions >= 767d1216bff82507c945e92fe719dff2083bb2f4, < 9ea55b9f43533d30168aae0dfdc5c230b561ef69. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware and software components. The nf_tables module within the Kernel package is responsible for packet filtering and manipulation. It allows users to define firewall rules and perform network address translation (NAT).
Vulnerability Detail
The vulnerability in nf_tables arises from a failure to hold the mutex on the netns pre_exit path. This can lead to a race condition where concurrent operations on the nf_tables subsystem can result in use-after-free or double-free vulnerabilities. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the nf_tables module if it is not required for their system's functionality. This can be achieved by blacklisting the module or removing it from the kernel configuration. However, this workaround may impact the system's ability to perform packet filtering and NAT operations.
Conclusion
The nf_tables vulnerability in the Kernel package can pose significant security risks, including arbitrary code execution, privilege escalation, and denial-of-service attacks. It is crucial to update the Kernel package to the latest version to mitigate these risks. If you need further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The vulnerability can potentially allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service condition.
You can use the Vulert Playground at Vulert 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 open-source vulnerabilities, including this one.
Yes, a temporary workaround is to disable the nf_tables module if it is not required for your system's functionality. However, this may impact the system's ability to perform packet filtering and NAT operations.
To update the Linux Kernel package, you can either obtain the latest version from the official Linux Kernel repository or use your Linux distribution's package manager to install the available updates.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry with ID GSD-2022-1003456.
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