CVE-2024-36923: linux-libc-dev - fs/9p: fix uninitialized values during inode evict
Summary
CVE-2024-36923: In the Linux kernel, the following vulnerability has been resolved: fs/9p: fix uninitialized values during inode evict If an iget fails due to not being able to retrieve information from the server then the inode structu... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
linux-libc-dev is a package that provides the necessary C library headers and symbolic links for compiling against the Linux kernel. It is a crucial component for developers and system administrators who need to build and run applications on Linux systems. This package contains the necessary files to compile C library functions and system calls for the Linux kernel. The vulnerability in this package affects the fs/9p component, which is responsible for handling the 9P protocol file system. The 9P protocol is used for sharing files and other resources between different operating systems. The vulnerability allows uninitialized values to be present in the inode structure during eviction, leading to potential security issues.
Vulnerability Detail
The vulnerability in linux-libc-dev (CVE-2024-36923) arises from a failure to fully initialize the inode structure when an iget operation fails to retrieve information from the server. This partial initialization can result in references to uninitialized structures, such as fscache cookies, being made when the inode is evicted. Attackers could potentially exploit these uninitialized values to gain unauthorized access or execute arbitrary code. The patch for this vulnerability checks for a bad_inode before performing any actions other than clearing the inode from the cache. As the inode is marked as bad, there should be no associated state that needs to be written back. The fix prevents the exploitation of uninitialized values and ensures the security of the affected system.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in linux-libc-dev (CVE-2024-36923) has been addressed with a patch that prevents uninitialized values from being present in the inode structure during eviction. Users are advised to update the linux-libc-dev package to version 6.1.90-1 or later to ensure the security of their systems. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
linux-libc-dev is a package that provides the necessary C library headers and symbolic links for compiling against the Linux kernel. It is essential for developers and system administrators who need to build and run applications on Linux systems.
fs/9p is a component of the Linux kernel responsible for handling the 9P protocol file system. The 9P protocol is used for sharing files and resources between different operating systems.
The vulnerability in linux-libc-dev could allow attackers to exploit uninitialized values in the inode structure, potentially leading to unauthorized access or arbitrary code execution.
To fix the vulnerability, it is recommended to update the linux-libc-dev package to version 6.1.90-1 or later using the package manager's update command.
No specific workaround has been provided for this vulnerability. It is recommended to update the linux-libc-dev package to the patched version.
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