Race Condition Vulnerability in rxrpc_exit_net() in Kernel
Summary
GSD-2022-1002178: rxrpc: fix a race in rxrpc_exit_net(). Affects Kernel versions >= ace45bec6d77bc061c3c3d8ad99e298ea9800c2b, < 7ee84d29f22de6f6c63fad6c54690517659862f1. No fix is published. How to fix ↓
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Background
The Kernel is a key component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The rxrpc module in the Kernel is responsible for handling the Reliable Datagram Sockets (rxrpc) protocol, which enables secure and reliable communication between networked devices.
However, a race condition vulnerability has been identified in the rxrpc_exit_net() function of the Kernel. A race condition occurs when multiple threads or processes access shared resources concurrently, leading to unexpected and potentially harmful behavior. In this case, the vulnerability arises due to improper synchronization during the exit process of the rxrpc module, which can result in memory corruption or other security issues.
Vulnerability Detail
The race condition vulnerability in rxrpc_exit_net() can be exploited by an attacker to manipulate shared resources in an unintended manner. By carefully timing their actions, an attacker can potentially corrupt memory, cause crashes, or execute arbitrary code within the Kernel's context. This could lead to a variety of security consequences, including privilege escalation, information disclosure, or denial of service attacks.
The vulnerability was introduced in version v4.17 of the Kernel and has been present until version v5.4.189. However, it has been fixed in the latest version by commit 7ee84d29f22de6f6c63fad6c54690517659862f1.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the rxrpc module if it is not essential for their system's functionality. This can be achieved by modifying the Kernel configuration and rebuilding it without the rxrpc module. However, this workaround may not be feasible in all scenarios, especially if the rxrpc functionality is required for specific applications or network communication.
Conclusion
The race condition vulnerability in rxrpc_exit_net() poses a significant security risk to systems running affected versions of the Kernel. It is crucial to update to the latest version (v5.4.189 or later) to mitigate this vulnerability and ensure the proper synchronization of shared resources. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
A race condition vulnerability occurs when multiple threads or processes access shared resources concurrently, leading to unexpected and potentially harmful behavior. It can result in memory corruption, crashes, or the execution of arbitrary code.
The vulnerability in rxrpc_exit_net() can be exploited to manipulate shared resources in unintended ways. This could lead to memory corruption, privilege escalation, information disclosure, or denial of service attacks.
To fix this vulnerability, it is recommended to update the Kernel to version v5.4.189 or later. This can be done by obtaining the latest version from the official Linux Kernel repository and following the installation instructions provided.
As a temporary workaround, users can disable the rxrpc module if it is not essential for their system's functionality. This can be achieved by modifying the Kernel configuration and rebuilding it without the rxrpc module.
The vulnerability was introduced in version v4.17 of the Kernel and has been present until version v5.4.189. It has been fixed in the latest version by commit 7ee84d29f22de6f6c63fad6c54690517659862f1.
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