NFS: Use-after-free vulnerability in nfs4_init_client()
Summary
UVI-2021-1000865: NFS: Fix use-after-free in nfs4_init_client(). Affects Kernel versions >= 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da, < c7eab9e2d7b4e983ce280276fb920af649955897. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and processes. The NFS (Network File System) is a distributed file system protocol that allows remote file access over a network. The nfs4_init_client() function is responsible for initializing an NFSv4 client structure. This vulnerability affects the Linux Kernel and specifically impacts the nfs4_init_client() function.
Vulnerability Detail
The vulnerability identified as UVI-2021-1000865 is a use-after-free vulnerability in the nfs4_init_client() function of the Linux Kernel. This vulnerability occurs when the function attempts to access memory that has already been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The vulnerability was introduced in version v4.13 of the Linux Kernel and has been fixed in version v4.14.237.
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 use-after-free vulnerability in the nfs4_init_client() function of the Linux Kernel can potentially lead to arbitrary code execution or denial-of-service. It is crucial to update the Kernel to version v4.14.237 or later to mitigate this vulnerability. For further support or assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition on a system running the affected version of the Linux Kernel.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the playground will provide real-time alerts for open-source vulnerabilities, including this one.
Yes, a patch has been released to fix this vulnerability. It is recommended to update the Linux Kernel to version v4.14.237 or later.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over a network.
There are no known instances of this vulnerability being exploited in the wild at the time of this report.
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