net: Only allow init netns to set default tcp cong to a restricted algo in Kernel
Summary
GSD-2021-1000225: net: Only allow init netns to set default tcp cong to a restricted algo. Affects Kernel versions >= 6670e152447732ba90626f36dfc015a13fbf150e, < e7d7bedd507bb732e600403b7a96f9fe48d0ca31. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
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 processes, and handles various device drivers. The vulnerability in question pertains to the default TCP congestion control algorithm in the networking subsystem of the Kernel.
Vulnerability Detail
The vulnerability allows only the initial network namespace (netns) to set the default TCP congestion control algorithm to a restricted option. This restriction aims to prevent unauthorized changes to the default algorithm, which could potentially lead to performance degradation or security issues. The impact and exploitability of this vulnerability have not been proven yet, but it highlights the importance of maintaining strict control over the default TCP congestion control algorithm.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate potential risks by ensuring that only trusted entities have access to modify the default TCP congestion control algorithm in the network namespace.
Conclusion
The vulnerability in the default TCP congestion control algorithm in the Kernel has been addressed in the latest version. Users are advised to update their Kernel to the latest version to ensure the security and stability of their systems. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as a bridge between hardware and software.
A TCP congestion control algorithm is a mechanism used to regulate the rate at which data is transmitted over a network to avoid congestion and ensure efficient utilization of network resources.
Restricting changes to the default TCP congestion control algorithm helps maintain stability, performance, and security of the network by preventing unauthorized modifications that could lead to suboptimal performance or potential security vulnerabilities.
To update your Kernel to the latest version, you can obtain the updated Kernel source code from the official Linux Kernel repository and compile it according to the provided instructions.
As of now, there is no known exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
