Vulnerability in Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1004049: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < 3db889f883e65bbd3b1401279bfc1e9ed255c481. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that provides core functionality and acts as a bridge between hardware and software. It manages system resources, facilitates communication between processes, and handles various low-level tasks. The tcp_rtx_synack() function within the Kernel is responsible for retransmitting SYN-ACK packets during TCP connection establishment. However, a vulnerability has been discovered where this function can be called from process context, potentially leading to security issues.
Vulnerability Detail
The tcp_rtx_synack() function in the Kernel can be invoked from process context, which is not intended behavior. This vulnerability can be exploited by an attacker to execute arbitrary code or perform other malicious activities within the Kernel. The impact and attack plausibility of this vulnerability have not been proven yet, but it poses a potential risk to the security and stability of the system. The vulnerability was introduced in Kernel version v3.7 and has been fixed in version v4.9.318.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can apply the patch provided in the commit 3db889f883e65bbd3b1401279bfc1e9ed255c481. This patch modifies the tcp_rtx_synack() function to prevent it from being called from process context. Users can manually apply this patch to their Kernel source code and recompile it to address the vulnerability.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel where the tcp_rtx_synack() function can be called from process context. This vulnerability can potentially be exploited by attackers to compromise the security and stability of the system. It is crucial to update the Kernel to the latest version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionality and acts as a bridge between hardware and software.
The tcp_rtx_synack() function in the Kernel is responsible for retransmitting SYN-ACK packets during TCP connection establishment.
This vulnerability can be exploited by an attacker to execute arbitrary code or perform other malicious activities within the Kernel.
The impact and attack plausibility of this vulnerability have not been proven yet, but it poses a potential risk to the security and stability of the system.
To fix this vulnerability, it is recommended to update the Kernel to version v4.9.318 or later.
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