Deadlock Vulnerability in sa1100_set_termios() in Kernel
Summary
GSD-2022-1003827: drivers: tty: serial: Fix deadlock in sa1100_set_termios(). Affects Kernel versions < 920f0ae7a129ffee98a106e3bbdfd61a2a59e939. 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 functionalities and interfaces between hardware and software. It manages system resources, including memory, processes, and device drivers. The sa1100_set_termios() function is part of the Kernel's tty subsystem and is responsible for setting terminal I/O settings for the SA1100 serial driver. This driver is commonly used for serial communication on ARM-based systems. However, a deadlock vulnerability has been discovered in sa1100_set_termios() that can lead to system instability and potential denial-of-service attacks.
Vulnerability Detail
The vulnerability in sa1100_set_termios() arises from a potential deadlock scenario. When certain conditions are met during the execution of this function, a deadlock can occur, causing the system to become unresponsive. An attacker could exploit this vulnerability by sending specially crafted input to trigger the deadlock, leading to a denial-of-service situation. The impact of this vulnerability can range from temporary system unresponsiveness to a complete system crash, depending on the severity of the deadlock. It is important to note that the actual attack plausibility and impact have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid the vulnerability by disabling the SA1100 serial driver if it is not essential for their system's operation. This can be achieved by removing the relevant kernel module or disabling the driver in the kernel configuration. However, this workaround may not be feasible in cases where the SA1100 serial driver is required for critical functionality.
Conclusion
In conclusion, a deadlock vulnerability has been identified in the sa1100_set_termios() function of the Kernel's tty subsystem. This vulnerability can result in system instability and potential denial-of-service attacks. It is crucial to update the Linux Kernel to the recommended version or apply the provided workaround to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from temporary system unresponsiveness to a complete system crash, depending on the severity of the deadlock.
An attacker can exploit this vulnerability by sending specially crafted input to trigger the deadlock, leading to a denial-of-service situation.
No, the actual attack plausibility and impact have not been proven yet. This vulnerability is an automated ID intended to aid in the discovery of potential security vulnerabilities.
To fix this vulnerability, update the Linux Kernel to version v4.19.247 or later, which includes the necessary patch for sa1100_set_termios().
Yes, a workaround is available by disabling the SA1100 serial driver if it is not essential for the system's operation.
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