Vulnerability in Linux Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1003528: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < 0a0f7f84148445c9f02f226928803a870139d820. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It is a critical piece of software that enables the functioning of various devices and services. The tcp_rtx_synack() function in the kernel's TCP implementation is susceptible to being called from process context, which can lead to potential security vulnerabilities.
Vulnerability Detail
The vulnerability arises from the fact that tcp_rtx_synack() can be invoked from process context. This means that an attacker with sufficient privileges can potentially exploit this vulnerability to execute arbitrary code or perform other malicious activities. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.10.122 by commit 0a0f7f84148445c9f02f226928803a870139d820. However, it was introduced in version v3.7 by commit 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can consider implementing access controls and privilege separation mechanisms to limit the impact of potential exploitation. Additionally, it is advisable to follow security best practices such as regularly updating the kernel and applying patches as they become available.
Conclusion
In conclusion, the vulnerability in the Linux Kernel's tcp_rtx_synack() function can be exploited from process context, potentially leading to arbitrary code execution or other malicious activities. It is crucial to update the kernel to the fixed version or apply patches as soon as possible to mitigate the risk. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware.
tcp_rtx_synack() is a function in the Linux Kernel's TCP implementation that handles retransmission of SYN-ACK packets in TCP connections.
Process context refers to the execution context of a process, including the resources and privileges associated with it.
If exploited, this vulnerability can allow an attacker to execute arbitrary code or perform other malicious activities with the privileges of the affected process.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.122 or later.
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