NFS: Use-after-free vulnerability in nfs4_init_client() in Kernel
Summary
GSD-2021-1000966: NFS: Fix use-after-free in nfs4_init_client(). Affects Kernel versions >= 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da, < c3b6cf64dfe4ef96e7341508d50d6998da7062c7. 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 enables the execution of user programs. The NFS (Network File System) is a distributed file system protocol that allows remote file access over a network. It is commonly used for sharing files between systems. The nfs4_init_client() function in the Kernel is responsible for initializing an NFSv4 client structure. This vulnerability affects the Kernel's implementation of this function.
Vulnerability Detail
The vulnerability identified as GSD-2021-1000966 is a use-after-free vulnerability in the nfs4_init_client() function of the Kernel. A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, leading to potential memory corruption and exploitation. In this case, the vulnerability arises due to improper handling of a client structure during initialization. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
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. Users are advised to apply the fix by updating the Kernel to the recommended version.
Conclusion
The use-after-free vulnerability in the nfs4_init_client() function of the Kernel poses a potential security risk. It is crucial to update the Kernel to the recommended version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices.
NFS (Network File System) is a distributed file system protocol that allows remote file access over a network.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, leading to potential memory corruption and exploitation.
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
To fix this vulnerability, it is recommended to update the Kernel to version v5.10.44 or later.
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