Vulnerability in Kernel: serial: 8250_aspeed_vuart
Summary
GSD-2022-1003290: serial: 8250_aspeed_vuart: Fix potential NULL dereference in aspeed_vuart_probe. Affects Kernel versions >= 54da3e381c2b55289b220601f403f17df7b20597, < 923d34ce069e8e51a4d003caa6b66a8cd6ecd0ed. 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 with hardware devices. It manages system resources, facilitates communication between software and hardware, and enables the execution of user programs. The serial: 8250_aspeed_vuart module is responsible for handling serial communication on systems utilizing the Aspeed AST2500 or AST2600 BMC (Baseboard Management Controller) chips. It allows for the transmission and reception of data through virtual UART (Universal Asynchronous Receiver-Transmitter) ports. However, a vulnerability has been identified in the aspeed_vuart_probe function of this module.
Vulnerability Detail
The vulnerability in the serial: 8250_aspeed_vuart module arises from a potential NULL dereference in the aspeed_vuart_probe function. This means that under certain conditions, a pointer within the code may be accessed without proper validation, leading to a crash or unexpected behavior. While the exact impact and attack plausibility have not been proven, this vulnerability has the potential to be exploited by malicious actors to disrupt system functionality or gain unauthorized access. It is important to note that this vulnerability has been fixed in the Linux Kernel version v5.15.47, and it was introduced in version v5.14.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the serial: 8250_aspeed_vuart module if it is not essential for their system's operation. This can be achieved by blacklisting the module or removing its corresponding kernel module file. However, it is important to consider the impact of disabling this functionality on the system's overall functionality and requirements.
Conclusion
The vulnerability in the serial: 8250_aspeed_vuart module of the Kernel poses a potential risk to system stability and security. It is crucial to update the Linux Kernel to version v5.15.47 or later to mitigate this vulnerability. Alternatively, users can consider disabling the module if it is not necessary for their system's operation. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The serial: 8250_aspeed_vuart module is a component of the Linux Kernel that handles serial communication using virtual UART ports on systems with Aspeed AST2500 or AST2600 BMC chips.
A NULL dereference vulnerability occurs when a program attempts to access or dereference a memory address that is NULL (i.e., does not point to a valid memory location). This can lead to crashes, unexpected behavior, or potential security vulnerabilities.
The potential consequences of this vulnerability include system crashes, unexpected behavior, and the possibility of exploitation by malicious actors to disrupt system functionality or gain unauthorized access.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it in real-time to identify any open-source vulnerabilities, including this one.
Yes, a workaround for this vulnerability is to disable the serial: 8250_aspeed_vuart module if it is not essential for your system's operation. This can be done by blacklisting the module or removing its corresponding kernel module file.
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