Data Races in proc_douintvec_minmax() in Kernel
Summary
GSD-2022-1004404: sysctl: Fix data races in proc_douintvec_minmax(). Affects Kernel versions >= 61d9b56a89208d8cccd0b4cfec7e6959717e16e3, < 40e0477a7371d101c55b69d9c32a7a1ed82ab5ea. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The proc_douintvec_minmax() function is a part of the sysctl subsystem in the Kernel, which allows users to configure and monitor various system parameters. This vulnerability in proc_douintvec_minmax() introduces data races, which can lead to unpredictable behavior and potential security risks.
Vulnerability Detail
The data races in proc_douintvec_minmax() can occur when multiple threads or processes access and modify the same shared data concurrently without proper synchronization. This can result in inconsistent or corrupted data, leading to various issues such as crashes, incorrect system behavior, or even potential security vulnerabilities. Attackers may exploit these data races to manipulate system parameters or gain unauthorized access to sensitive information. The vulnerability was introduced in version v4.13 of the Kernel and has been fixed in version v5.15.56.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can mitigate the risk of data races by avoiding concurrent access to the affected system parameters. This can be achieved by ensuring that only one thread or process modifies the parameters at a time, using synchronization mechanisms such as locks or atomic operations. However, this workaround may not provide complete protection and should be considered temporary until the Kernel is updated.
Conclusion
The data races in proc_douintvec_minmax() pose a potential security risk in the Kernel. It is crucial to update the Linux Kernel to version v5.15.56 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground (https://vulert.com/scanner) to check if their system is affected and obtain real-time alerts for open-source vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Data races can lead to unpredictable system behavior, crashes, and potential security vulnerabilities. Attackers may exploit these races to manipulate system parameters or gain unauthorized access to sensitive information.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
Yes, the vulnerability has been fixed in Linux Kernel version v5.15.56. It is recommended to update your Kernel to this version or later to mitigate the risk.
As a temporary workaround, you can avoid concurrent access to the affected system parameters by ensuring only one thread or process modifies them at a time. However, this workaround may not provide complete protection and should be considered temporary until the Kernel is updated.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1004xxx/GSD-2022-1004404.json) for more information about this vulnerability, including its impact and fix.
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