Unintentional Stack Access Vulnerability in Kernel
Summary
GSD-2021-1000119: mtd: physmap: physmap-bt1-rom: Fix unintentional stack access. Affects Kernel versions >= b3e79e7682e075326df8041b826b03453acacd0a, < 4e4ebb827bf09311469ffd9d0c14ed40ed9747aa. 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 ensures the stability and security of the system. The vulnerability in focus affects the Kernel's 'physmap-bt1-rom' module, which is responsible for handling memory-mapped devices. This vulnerability allows unintentional access to the stack, potentially leading to unauthorized access, data corruption, or system crashes.
Vulnerability Detail
The vulnerability arises due to a coding error in the 'physmap-bt1-rom' module of the Kernel. It was introduced in version v5.10 and fixed in v5.11.20. An attacker could exploit this vulnerability by crafting malicious input that triggers the unintentional stack access. The impact of this vulnerability includes potential unauthorized access to sensitive data, modification of critical system information, or disruption of system functionality. It is crucial to address this vulnerability promptly to prevent potential security breaches.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can temporarily disable or unload the 'physmap-bt1-rom' module if it is not essential for their system's operation. However, this workaround may result in the loss of certain functionalities or compatibility issues with specific hardware devices. It is advisable to apply the official fix by updating the Kernel to the recommended version.
Conclusion
The unintentional stack access vulnerability in the 'physmap-bt1-rom' module of the Linux Kernel can lead to unauthorized access, data corruption, or system crashes. It is crucial to update the Kernel to version v5.11.20 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows unauthorized access to sensitive data, potential modification of critical system information, or disruption of system functionality.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file, such as package-lock.json, and Vulert will analyze it for any open-source vulnerabilities, including this one.
Yes, you can temporarily disable or unload the 'physmap-bt1-rom' module if it is not essential for your system's operation. However, this may result in the loss of certain functionalities or compatibility issues with specific hardware devices.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.11.20 or later. This update includes the necessary patch to rectify the unintentional stack access issue.
You can find more information about this vulnerability, including technical details and the fix, in the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/.
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