Vulnerability in Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1003861: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < 58bd38cbc961fd799842b7be8c5222310f04b908. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The tcp_rtx_synack() function is part of the TCP/IP networking stack in the Kernel and is responsible for handling retransmission of SYN-ACK packets during TCP connection establishment. However, a vulnerability has been discovered in this function that allows it to be called from process context, potentially leading to security issues.
Vulnerability Detail
The vulnerability arises from the ability to call tcp_rtx_synack() from process context, which was not intended or designed for such usage. This can result in unexpected behavior and potential security risks. While the exact impact and attack vectors have not been proven, it is crucial to address this vulnerability to prevent any potential exploitation. The vulnerability was introduced in Kernel version v3.7 and has been fixed in version v4.19.247 by commit 58bd38cbc961fd799842b7be8c5222310f04b908.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in Kernel's tcp_rtx_synack() function being called from process context can lead to potential security risks. It is crucial to update the Kernel to version v4.19.247 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The exact impact of this vulnerability is not yet proven, but it has the potential to be exploited for malicious purposes. It is important to address this vulnerability to ensure the security and stability of the system.
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.
At the time of this report, no known exploits for this vulnerability have been disclosed. However, it is important to address the vulnerability promptly to mitigate any potential risks.
For more detailed information about this vulnerability, including technical details and the specific commit that fixed it, you can refer to the vulnerability database entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003861.json.
The latest version of the Kernel can be obtained from the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/. Make sure to choose the appropriate version for your Linux distribution.
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