Vulnerability in btrfs Package: Return Whole Extents in fiemap
Summary
GSD-2021-1000624: btrfs: return whole extents in fiemap. Affects Kernel versions < 55575c08502f291cdeff09428189b84084ffa91b. No fix is published. How to fix ↓
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Background
The btrfs package is a component of the Linux Kernel ecosystem. It provides support for the B-tree file system, offering advanced features such as snapshots, subvolumes, and data compression. The package is widely used in Linux distributions and is responsible for managing file systems on storage devices. However, a vulnerability has been discovered in the btrfs package that allows for the return of whole extents in fiemap.
Vulnerability Detail
The vulnerability in the btrfs package allows an attacker to obtain whole extents in fiemap. This can potentially lead to unauthorized access to sensitive data or the ability to manipulate file system structures. The vulnerability was introduced in an unknown version and has been fixed in Linux Kernel version v5.4.124 by commit 55575c08502f291cdeff09428189b84084ffa91b. The impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
The vulnerability in the btrfs package that allows for the return of whole extents in fiemap has been identified and fixed in Linux Kernel version v5.4.124. It is recommended to update the Linux Kernel to the latest stable version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The btrfs package is a component of the Linux Kernel ecosystem that provides support for the B-tree file system.
fiemap is a file system ioctl that allows applications to map the extents of a file.
This vulnerability could potentially lead to unauthorized access to sensitive data or the ability to manipulate file system structures.
There is no information available regarding exploitation of this vulnerability in the wild.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the playground will provide real-time alerts for open-source vulnerabilities.
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