Vulnerability in Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1003725: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < d05c2fdf8e10528bb6751bd95243e862d5402a9b. 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 security and stability of the system. The tcp_rtx_synack() function in the Kernel is responsible for handling retransmission of SYN-ACK packets in TCP connections. 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 fact that tcp_rtx_synack() can be invoked from process context, which was not intended. This could potentially allow an attacker to manipulate the TCP retransmission mechanism and disrupt network connections. The impact and attack plausibility of this vulnerability have not been proven yet, but it is important to address it to ensure the security and reliability of the system. The vulnerability was introduced in Kernel version v3.7 and has been fixed in version v5.4.198.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Kernel to version v5.4.198 or later. This can be done by obtaining the latest version of the Kernel source code from the official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it according to the provided instructions. Alternatively, users can wait for their Linux distribution to release an updated package containing the fixed version of the Kernel.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in Kernel's tcp_rtx_synack() function, which allows it to be called from process context, poses potential security risks to network connections and system reliability. It is crucial to update the Kernel to version v5.4.198 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it has the potential to disrupt network connections and compromise the security and reliability 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 it will analyze and alert you in real-time if any open-source vulnerabilities, including this one, are found.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to address it promptly to mitigate any potential risks.
While there is no specific workaround mentioned for this vulnerability, it is recommended to follow general security best practices such as keeping your system up to date with the latest patches and regularly monitoring for any suspicious network activity.
For more detailed information about this vulnerability, you can refer to the source provided by the Cloud Security Alliance's GSD Database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003725.json
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