Potential NULL dereference in aspeed_vuart_probe in Kernel
Summary
GSD-2022-1002994: serial: 8250_aspeed_vuart: Fix potential NULL dereference in aspeed_vuart_probe. Affects Kernel versions >= 54da3e381c2b55289b220601f403f17df7b20597, < 90a6b6fc52bfdcfe9698454bf5bea26112abbcd1. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. The vulnerability in question affects the Kernel's serial driver, specifically the 8250_aspeed_vuart module. This module is responsible for handling serial communication on ASPEED BMC (Baseboard Management Controller) platforms. The vulnerability may lead to a NULL dereference, which can result in a system crash or potential exploitation by an attacker.
Vulnerability Detail
The vulnerability arises from a potential NULL dereference in the aspeed_vuart_probe function of the 8250_aspeed_vuart module. This function is responsible for initializing the ASPEED virtual UART (vUART) device. If a NULL pointer is encountered during the initialization process, it can lead to a system crash or potential security issues. The impact and attack plausibility of this vulnerability have not been proven yet, but it is essential to address it to ensure system stability and security.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been mentioned for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the latest version.
Conclusion
The potential NULL dereference vulnerability in the aspeed_vuart_probe function of the 8250_aspeed_vuart module in the Kernel can lead to system crashes or potential security issues. It is crucial to update the Linux Kernel to version v5.17.15 or later to address this vulnerability. By doing so, the vulnerable code will be replaced with the patched version, ensuring system stability and security. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can range from a system crash to potential security issues. Exploitation of the NULL dereference could allow an attacker to gain unauthorized access or disrupt the system's normal operation.
You can use tools like Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert Playground allows you to analyze your manifest file, such as package-lock.json, and provides real-time alerts for open-source vulnerabilities.
As of now, there is no known exploit for this vulnerability. However, it is crucial to address it promptly by updating the Linux Kernel to the fixed version to mitigate any potential risks.
The exploitation of this vulnerability requires access to the system and the ability to trigger the vulnerable code path. It is advisable to apply the fix as soon as possible to prevent any potential exploitation.
As there is no specific workaround mentioned for this vulnerability, it is recommended to prioritize updating the Linux Kernel to the fixed version. Applying temporary measures may not provide adequate protection against potential exploitation.
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