Buffer Overflow Vulnerability in Linux Kernel (Debian:13 and Debian:14)
Summary
DEBIAN-CVE-2024-49869: In the Linux kernel, the following vulnerability has been resolved: btrfs: send: fix buffer overflow detection when copying path to cache entry Starting with commit c0247d289e73 ("btrfs: send: annotate struct name_cache_... Affects linux versions < 6.11.4-1. Fixed in 6.11.4-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It is a critical piece of software that supports various functionalities, including process management, memory management, and device control. The vulnerability identified as CVE-2024-49869 affects the btrfs filesystem, which is a modern filesystem for Linux that provides advanced features such as snapshots and dynamic inode allocation. This vulnerability can lead to buffer overflow issues, potentially compromising system integrity.
Vulnerability Detail
The vulnerability arises from improper handling of the variable length array 'name' in the name_cache_entry structure within the btrfs send functionality. The array's length does not account for the NUL string terminator, leading to incorrect overflow detection by fortified kernels. This can result in a buffer overflow warning, indicating that a write operation exceeds the allocated buffer size. If exploited, this vulnerability could lead to system crashes or arbitrary code execution, posing significant risks to system stability and security.
How To Fix
Minimum fixed version
6.11.4-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate any risks.
Conclusion
The CVE-2024-49869 vulnerability in the Linux kernel poses significant risks due to improper buffer overflow detection in the btrfs filesystem. Users are advised to update their systems to the patched version to ensure security and stability. Regular monitoring for vulnerabilities using platforms like Vulert can help maintain the integrity of your software.
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FAQ
CVE-2024-49869 is a vulnerability in the Linux kernel related to buffer overflow detection in the btrfs filesystem.
This vulnerability can lead to system crashes or arbitrary code execution, compromising system stability and security.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software without requiring access to the code or installation.
While there are no specific workarounds, it is crucial to plan for an update to mitigate the risks associated with this vulnerability.
Detailed information can be found in the official Debian CVE database and the Linux kernel documentation.
References
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