Vulnerability in Kernel: io_uring - Disallow Modification of rsrc_data during Quiesce
Summary
GSD-2022-1000753: io_uring: disallow modification of rsrc_data during quiesce. Affects Kernel versions < cb87bfcab8f046c167245dd85161a95d8c923e0d. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as a bridge between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The io_uring subsystem in the Kernel is responsible for high-performance I/O operations and provides an interface for asynchronous I/O with low latency. However, a vulnerability has been discovered in the io_uring subsystem that allows unauthorized modification of rsrc_data during the quiesce state.
Vulnerability Detail
The vulnerability in the io_uring subsystem of the Kernel allows an attacker to modify rsrc_data during the quiesce state. This can lead to various security issues, including privilege escalation, denial of service, or information disclosure. During the quiesce state, the system is preparing for a shutdown or transitioning to a different state, and any unauthorized modification of rsrc_data can disrupt the normal operation of the system. The vulnerability has been addressed in the Linux Kernel version v5.16.12 by commit cb87bfcab8f046c167245dd85161a95d8c923e0d.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.16.12 or later. This can be done by obtaining the latest Kernel source code from the official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it for the target system. Alternatively, users can wait for their Linux distribution to provide an updated package containing the fixed Kernel version.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Kernel to the fixed version as soon as possible to mitigate the risk of exploitation.
Conclusion
The vulnerability in the io_uring subsystem of the Kernel, which allows unauthorized modification of rsrc_data during the quiesce state, poses significant security risks. It is crucial to update the Kernel to version v5.16.12 or later to mitigate the vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability allows unauthorized modification of rsrc_data during the quiesce state, which can lead to privilege escalation, denial of service, or information disclosure.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
Yes, the vulnerability has been fixed in the Linux Kernel version v5.16.12 by commit cb87bfcab8f046c167245dd85161a95d8c923e0d. It is recommended to update the Kernel to this version or later.
There is no known workaround for this vulnerability. Updating the Kernel to the fixed version is the recommended solution.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1000xxx/GSD-2022-1000753.json) for more information.
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