Integer Overflow Vulnerability in NFSD on 32-bit Systems
Summary
GSD-2022-1001623: NFSD: prevent integer overflow on 32 bit systems. Affects Kernel versions < 79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c. No fix is published. How to fix ↓
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Background
The NFSD (Network File System Daemon) is a component of the Linux Kernel that allows remote clients to access files over a network. It provides file sharing services using the NFS (Network File System) protocol. NFSD is an integral part of the Linux Kernel and is responsible for handling NFS requests and managing file access. However, on 32-bit systems, NFSD is vulnerable to an integer overflow issue.
Vulnerability Detail
The integer overflow vulnerability in NFSD on 32-bit systems allows an attacker to trigger a buffer overflow or other memory corruption issues. By exploiting this vulnerability, an attacker could potentially execute arbitrary code with kernel-level privileges or crash the system. The vulnerability arises due to a lack of proper input validation, which allows an attacker to provide malicious input that triggers the integer overflow. This can lead to unexpected behavior and compromise the security and stability of the 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. It is recommended to apply the fix by updating the Linux Kernel to the latest version.
Conclusion
The integer overflow vulnerability in NFSD on 32-bit systems can be mitigated by updating the Linux Kernel to version v5.16.19 or later. This update includes the necessary patches to prevent the integer overflow and enhance the security and stability of the system. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
NFSD (Network File System Daemon) is a component of the Linux Kernel that allows remote clients to access files over a network using the NFS (Network File System) protocol.
An integer overflow vulnerability occurs when an arithmetic operation results in a value that exceeds the maximum representable value for the data type used to store the result. This can lead to unexpected behavior and potential security vulnerabilities.
The potential consequences of this vulnerability include remote code execution with kernel-level privileges, system crashes, and compromise of system security and stability.
You can use tools like Vulert to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
You can refer to the provided references link for more details about this vulnerability and the fix implemented in the Linux Kernel.
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