Data-races in tcp: Fix data-races around sysctl_tcp_max_reordering
Summary
GSD-2022-1004103: tcp: Fix data-races around sysctl_tcp_max_reordering. Affects Kernel versions >= dca145ffaa8d39ea1904491ac81b92b7049372c0, < 46deb91ac8a790286ad6d24cf92e7ab0ab2582bb. No fix is published. How to fix ↓
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Background
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel. It provides the core functionality for various Linux distributions. The tcp module in the Linux Kernel handles the Transmission Control Protocol (TCP) networking protocol, which is responsible for establishing and maintaining network connections. The sysctl_tcp_max_reordering parameter controls the maximum number of packets that can be reordered in a TCP stream. This vulnerability in the tcp module introduces data-races around sysctl_tcp_max_reordering, which can lead to potential security issues.
Vulnerability Detail
The data-races in the tcp module around sysctl_tcp_max_reordering can result in unpredictable behavior and race conditions. Attackers may be able to exploit these data-races to manipulate network connections, potentially leading to denial-of-service attacks or unauthorized access to sensitive information. The vulnerability was introduced in Linux Kernel version v3.19 and is fixed in version v5.18.15 by commit 46deb91ac8a790286ad6d24cf92e7ab0ab2582bb.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The data-races in the tcp module around sysctl_tcp_max_reordering vulnerability in the Linux Kernel can have serious security implications. It is crucial to update the Kernel to the fixed version or apply the provided patch to mitigate the risk. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability can potentially be exploited by attackers to manipulate network connections, leading to denial-of-service attacks or 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, a patch is available in Linux Kernel version v5.18.15. It is recommended to update to this version or later to fix the vulnerability.
The recommended approach is to update the Linux Kernel to the fixed version. However, if updating is not immediately possible, you can consider implementing additional network security measures, such as firewall rules, to mitigate the risk to some extent.
There are no known instances of this vulnerability being exploited in the wild. However, it is always recommended to apply security patches promptly to minimize the risk of exploitation.
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