Data-races around sysctl_tcp_min_snd_mss in Kernel
Summary
GSD-2022-1004129: tcp: Fix data-races around sysctl_tcp_min_snd_mss. Affects Kernel versions >= 5f3e2bf008c2221478101ee72f5cb4654b9fc363, < 0d8a39feb58910a7f7746b1770ee5578cc551fe6. No fix is published. How to fix ↓
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Background
The Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It includes various subsystems, including the TCP/IP networking stack. The sysctl_tcp_min_snd_mss parameter in the TCP subsystem controls the minimum segment size for outgoing TCP packets. This vulnerability affects the Kernel's handling of data-races around sysctl_tcp_min_snd_mss.
Vulnerability Detail
The data-races around sysctl_tcp_min_snd_mss vulnerability in the Kernel can lead to unpredictable behavior and potential security risks. Data-races occur when multiple threads or processes access shared data concurrently without proper synchronization. In this case, the vulnerability arises due to improper handling of concurrent access to the sysctl_tcp_min_snd_mss parameter. Attackers may exploit this vulnerability to manipulate the value of sysctl_tcp_min_snd_mss, potentially leading to network performance degradation, packet loss, or even remote code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can manually apply the patch provided in the Linux Kernel commit 0d8a39feb58910a7f7746b1770ee5578cc551fe6. The patch addresses the data-races around sysctl_tcp_min_snd_mss vulnerability. Here is an example of how to apply the patch:
cd linux
wget <patch_url>
git apply <patch_file>
make
make install
Conclusion
The data-races around sysctl_tcp_min_snd_mss vulnerability in the Kernel can have significant security implications. It is crucial to update the Linux Kernel to version v5.18.15 or later to mitigate this vulnerability. Users can also apply the provided patch as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The data-races around sysctl_tcp_min_snd_mss vulnerability can result in unpredictable behavior and potential security risks. Attackers may exploit this vulnerability to manipulate network settings, leading to performance degradation, packet loss, or even remote code execution.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json.
Yes, a temporary workaround is to manually apply the patch provided in the Linux Kernel commit 0d8a39feb58910a7f7746b1770ee5578cc551fe6. Instructions for applying the patch can be found in the 'workaround' section of this report.
At the time of this report, there are no known public exploits specifically targeting the data-races around sysctl_tcp_min_snd_mss vulnerability. However, it is always recommended to apply security patches promptly to mitigate potential risks.
You can find more information about this vulnerability in the official Linux Kernel repository. The vulnerability is tracked under the ID GSD-2022-1004129, and the specific commit that fixes the issue is 0d8a39feb58910a7f7746b1770ee5578cc551fe6.
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