Vulnerability in Kernel Package: afs: Fix page leak
Summary
GSD-2021-1001760: afs: Fix page leak. Affects Kernel versions >= e87b03f5830ecd8ca21836d3ee48c74f8d58fa31, < d130b5fdd42254d92948d06347940276140c927e. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as a bridge between the hardware and software layers. The afs (Andrew File System) module within the Kernel package enables distributed file sharing and remote access capabilities. It allows users to access files stored on remote servers as if they were local. However, a vulnerability has been discovered in the afs module that could potentially lead to security breaches and unauthorized access to sensitive data.
Vulnerability Detail
The identified vulnerability in the afs module is related to a page leak issue. When certain operations are performed, the module fails to release allocated memory pages, resulting in a memory leak. This can lead to resource exhaustion and system instability. Attackers may exploit this vulnerability to exhaust system resources, causing denial-of-service (DoS) conditions or potentially executing arbitrary code with elevated privileges. The vulnerability was introduced in version v5.13 of the Linux Kernel and has been fixed in version v5.14.9.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the afs module if it is not essential for their system's functionality. This can be achieved by modifying the Kernel configuration and rebuilding the Kernel without the afs module. However, this workaround may impact the availability of certain file sharing and remote access features provided by afs.
Conclusion
The vulnerability in the afs module of the Kernel package can pose significant risks to system security and stability. It is crucial to update the Linux Kernel to version v5.14.9 or later to mitigate the vulnerability. Additionally, users can temporarily disable the afs module if it is not essential for their system's functionality. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to resource exhaustion, system instability, and potential unauthorized access to sensitive data.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will provide real-time alerts for open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the recommended fix to mitigate the risk.
Besides updating the Kernel, you can temporarily disable the afs module if it is not essential for your system. However, this may impact certain file sharing and remote access features provided by afs.
You can refer to the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ for detailed information about the fix. The vulnerability details are available in the GSD-2021-1001760.json file in the GSD database repository at https://github.com/cloudsecurityalliance/gsd-database.
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