Data-races around sysctl_tcp_slow_start_after_idle in Kernel
Summary
GSD-2022-1004663: tcp: Fix data-races around sysctl_tcp_slow_start_after_idle. Affects Kernel versions >= 35089bb203f44e33b6bbb6c4de0b0708f9a48921, < 369d99c2b89f54473adcf9acdf40ea562b5a6e0e. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities, such as process management, memory management, and device drivers. The vulnerability in question revolves around the sysctl_tcp_slow_start_after_idle feature in the TCP implementation of the Kernel.
Vulnerability Detail
The vulnerability arises due to data-races in the sysctl_tcp_slow_start_after_idle feature of the Kernel's TCP implementation. Data-races can lead to unpredictable behavior and potential security vulnerabilities. Although the exact impact and attack plausibility have not been proven, it is crucial to address this issue to ensure the stability and security of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the sysctl_tcp_slow_start_after_idle feature. However, this may impact the performance of TCP connections. To disable the feature, modify the relevant sysctl parameter. For example, in the sysctl.conf file, set 'net.ipv4.tcp_slow_start_after_idle' to '0'.
Conclusion
In conclusion, the data-races around sysctl_tcp_slow_start_after_idle in the Kernel's TCP implementation pose a potential security vulnerability. It is crucial to update the Kernel to the recommended version or apply the provided workaround to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides essential functionalities and acts as a bridge between the hardware and software layers.
sysctl_tcp_slow_start_after_idle is a feature in the TCP implementation of the Kernel that controls the behavior of TCP connections after an idle period.
Data-races occur when multiple threads or processes access shared data concurrently without proper synchronization, leading to unpredictable behavior and potential security vulnerabilities.
The exact impact and attack plausibility of this vulnerability have not been proven. However, data-races can introduce instability and potential security risks to the system.
To fix this vulnerability, update the Linux Kernel to version v5.4.208 or later, which resolves the data-races around sysctl_tcp_slow_start_after_idle.
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