Race Condition Vulnerability in Linux Kernel (CVE-2022-1247)
Summary
CVE-2022-1247: An issue found in linux-kernel that leads to a race condition in rose_connect(). Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for the operating system, including device drivers, process management, memory management, and file system support. The vulnerability identified as CVE-2022-1247 affects the Linux kernel and specifically impacts the rose driver, which is responsible for handling the ROSE (Radio Over IP) protocol. The vulnerability arises due to a race condition in the rose_connect() function, leading to potential issues when deleting rose_routes.
Vulnerability Detail
The race condition vulnerability in the rose_connect() function of the Linux kernel's rose driver can be exploited when attempting to delete a rose_route via the rose_ioctl() function. The vulnerability stems from the improper handling of the rose_neigh->use variable, which represents the number of objects using the rose_neigh. If a user wants to delete a rose_route, the rose driver calls rose_del_node() and removes neighbors only if their 'count' and 'use' values are zero. However, due to the race condition, it is possible for the 'use' value to be modified concurrently, leading to incorrect deletion of neighbors and potential resource leaks. This vulnerability could be exploited by an attacker to cause denial-of-service (DoS) conditions or potentially execute arbitrary code with elevated privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can consider disabling the ROSE protocol or removing the rose module if it is not required for their system. Disabling or removing the module eliminates the potential attack surface for this vulnerability. However, this workaround may not be feasible in scenarios where the ROSE protocol is essential for system functionality.
Conclusion
The race condition vulnerability in the Linux kernel's rose driver poses a potential risk to systems utilizing the ROSE protocol. It is crucial to promptly update the Linux kernel to a version that includes the necessary patches to mitigate this vulnerability. Regularly checking for updates from your Linux distribution provider and following best practices for system security will help ensure the overall security and stability of your system. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
This vulnerability can lead to denial-of-service (DoS) conditions or potential arbitrary code execution with elevated privileges.
The vulnerability affects Linux distributions using the Linux kernel version 5.10.209-2 or earlier. Specifically, Debian 10, 11, 12, and 13 are impacted.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to apply the necessary patches and updates to mitigate the risk.
Disabling the ROSE protocol or removing the rose module can serve as a temporary mitigation until the kernel is updated. However, this may not be feasible in all scenarios.
For more detailed information about this vulnerability, including technical specifics and updates, refer to the CVE-2022-1247 entry in the National Vulnerability Database (NVD) or consult your Linux distribution's security advisories.
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