NFS: Use-after-free vulnerability in nfs4_init_client()
Summary
GSD-2021-1001044: NFS: Fix use-after-free in nfs4_init_client(). Affects Kernel versions >= 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da, < 72651c6579a25317a90536181d311c663d0329ab. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system, responsible for managing the system's core functionality. It provides essential services such as process management, memory management, and device drivers. 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 in a networked environment.
Vulnerability Detail
The vulnerability identified as GSD-2021-1001044 is a use-after-free vulnerability in the nfs4_init_client() function of the NFS implementation in the Linux Kernel. This vulnerability was introduced in version v4.13 of the Kernel and was fixed in version v5.12.11. A use-after-free vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, leading to potential memory corruption and the possibility of arbitrary code execution. Exploiting this vulnerability could allow an attacker to gain unauthorized access to sensitive information or execute malicious code on the affected system.
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 nfs4_init_client() poses a significant security risk to systems running the affected versions of the Linux Kernel. It is crucial to update the Kernel to version v5.12.11 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could potentially allow an attacker to gain unauthorized access to sensitive information or execute arbitrary code on the affected system.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any known vulnerabilities, including GSD-2021-1001044.
At the time of this report, there are no known public exploits for this vulnerability. However, it is important to apply the recommended fix as soon as possible to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over the network and the necessary conditions are met.
For more details about this vulnerability, including the specific code changes that fix it, you can refer to the source link provided in the vulnerability details section of this report.
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