Vulnerability in Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1003965: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < c348b0f8d035fc4bdc040796889beec7218bd1b8. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages communication between hardware and software. It provides essential functionalities and services to enable the proper functioning 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 is not intended behavior. This could be exploited by an attacker to manipulate TCP connections and potentially disrupt network communication or launch further attacks. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v3.7 of the Linux Kernel and has been fixed in version v4.14.283.
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
In conclusion, the vulnerability in Kernel's tcp_rtx_synack() function being callable from process context poses potential security risks. It is crucial to update the Linux Kernel to the fixed version to mitigate these risks. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially lead to network communication disruptions or enable further attacks.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will provide real-time alerts for open-source vulnerabilities.
There is no known exploit for this vulnerability at the moment. However, it is important to apply the recommended fix to mitigate any potential risks.
The remote exploitability of this vulnerability has not been determined yet. Further analysis is required to assess the potential remote attack vectors.
The recommended solution is to update the Linux Kernel to the fixed version. There are no alternative solutions mentioned for this specific vulnerability.
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