NFS: Potential NULL Dereference in nfs_get_client()
Summary
UVI-2021-1001043: NFS: Fix a potential NULL dereference in nfs_get_client(). Affects Kernel versions >= 31434f496abb9f3410b10f541462fe58613dd3ad, < 58ddf61f10b8f9b7b1341644bfee2f1c6508d4e1. No fix is published. How to fix ↓
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Background
The Kernel package is an essential component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. NFS (Network File System) is a distributed file system protocol that allows remote file access over a network. The nfs_get_client() function is responsible for retrieving the NFS client structure. However, a potential vulnerability exists within this function that could lead to a NULL dereference.
Vulnerability Detail
The vulnerability arises from a potential NULL dereference in the nfs_get_client() function. If this vulnerability is exploited, it could result in a system crash or potentially allow an attacker to execute arbitrary code. The vulnerability was introduced in version v3.17 of the Linux Kernel and has been fixed in version v5.12.11. The impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
In conclusion, the NFS vulnerability in the Kernel package, specifically in the nfs_get_client() function, could potentially lead to a NULL dereference. It is crucial to update the Linux Kernel to version v5.12.11 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The potential impact of this vulnerability includes system crashes and the possibility of arbitrary code execution.
You can use Vulert's 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 provide real-time alerts for open-source vulnerabilities.
No known exploit has been reported for this vulnerability at this time.
The recommended mitigation is to update the Linux Kernel to version v5.12.11 or later.
You can find more information about this vulnerability in the Open Source Vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is UVI-2021-1001043.
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