Deadlock Vulnerability in sa1100_set_termios() in Linux Kernel
Summary
GSD-2022-1003681: drivers: tty: serial: Fix deadlock in sa1100_set_termios(). Affects Kernel versions < 09a5958a2452ad22d0cb638711ef34ea1863a829. 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 software to interact with the hardware. The sa1100_set_termios() function is part of the serial driver subsystem in the kernel, specifically designed for the StrongARM SA-1100 processor. This function is responsible for setting the terminal I/O attributes for the SA-1100 serial port. However, a deadlock vulnerability has been identified in this function, which could 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, a deadlock can occur, causing the system to become unresponsive. This vulnerability could be exploited by an attacker to disrupt the normal operation of the affected system. The impact of this vulnerability may vary depending on the specific use case and system configuration. It is important to note that the actual attack plausibility and impact have not been proven at this time.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Linux Kernel is not immediately feasible, a potential workaround for this vulnerability is to avoid using the affected serial port or disable the serial driver altogether. This can be achieved by modifying the kernel configuration or blacklisting the serial driver module. However, it is important to note that this workaround may impact the functionality of the system if the serial port is required for specific operations.
Conclusion
In conclusion, the sa1100_set_termios() function in the Linux Kernel is vulnerable to a deadlock issue, which could result in system instability and potential denial-of-service attacks. It is crucial to update the kernel to version v5.4.198 or later to mitigate this vulnerability. If immediate updating is not possible, alternative measures such as avoiding the use of the affected serial port or disabling the serial driver can be considered. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability may vary depending on the specific use case and system configuration. It could potentially lead to system instability and denial-of-service attacks.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any open-source vulnerabilities, including this specific issue.
Yes, a patch for this vulnerability is available in Linux Kernel version v5.4.198. Updating to this version or a later one will address the issue.
If updating the Linux Kernel is not immediately feasible, you can consider avoiding the use of the affected serial port or disabling the serial driver. However, this may impact the functionality of the system if the serial port is required for specific operations.
You can find more information about this vulnerability in the GSD-2022-1003681 entry of the GSD database, available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003681.json
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