Data-races around sysctl_tcp_fastopen in Kernel
Summary
GSD-2022-1004775: tcp: Fix data-races around sysctl_tcp_fastopen. Affects Kernel versions >= 2100c8d2d9db23c0a09901a782bb4e3b21bee298, < 03da610696a32578fc4f986479341ce9d430df08. No fix is published. How to fix ↓
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Background
The Kernel is a crucial 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 sysctl_tcp_fastopen feature in the Kernel allows for faster TCP connection establishment by sending data in the initial SYN packet. However, this feature is vulnerable to data-races, which can lead to unpredictable behavior and potential security risks.
Vulnerability Detail
The data-races around sysctl_tcp_fastopen in the Kernel can result in concurrent access to shared resources without proper synchronization. This can lead to race conditions, where the outcome of the execution depends on the relative timing of events. Attackers may exploit these race conditions to manipulate the state of the system, potentially leading to information disclosure, privilege escalation, or denial of service. The vulnerability was introduced in version v3.6 of the Kernel and has been fixed in version v4.19.254.
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. However, users can mitigate the risk by ensuring they have the latest version of the Kernel installed and by following best practices for system security.
Conclusion
The data-races around sysctl_tcp_fastopen vulnerability in the Kernel can pose significant security risks if left unaddressed. It is crucial to update to the fixed version of the Kernel (v4.19.254 or later) and follow best practices for system security. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The data-races vulnerability can potentially be exploited by attackers to manipulate the state of the system, leading to various security risks such as information disclosure, privilege escalation, or denial of service.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
Yes, the data-races around sysctl_tcp_fastopen vulnerability has been fixed in version v4.19.254 of the Linux Kernel. It is recommended to update to this version or a later version to mitigate the risk.
At the time of this report, there are no known public exploits targeting the data-races around sysctl_tcp_fastopen vulnerability. However, it is important to apply the necessary updates and follow best practices for system security to minimize the risk.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1004xxx/GSD-2022-1004775.json) for more information about the data-races around sysctl_tcp_fastopen vulnerability.
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