ARM Kernel: hw_breakpoint Overflow Handler Check Vulnerability
Summary
GSD-2021-1000468: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook. Affects Kernel versions >= 1879445dfa7bbd6fe21b09c5cc72f4934798afed, < ed1f67465327cec4457bb988775245b199da86e6. No fix is published. How to fix ↓
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Background
The ARM Kernel is a component of the Linux operating system that is specifically designed for ARM-based processors. It provides essential functionalities and device drivers for ARM architecture. One of the features of the ARM Kernel is the hw_breakpoint, which allows hardware breakpoints to be set for debugging purposes. These breakpoints can be used to interrupt program execution when specific conditions are met. However, a vulnerability has been discovered in the ARM Kernel's hw_breakpoint implementation that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the ARM Kernel's hw_breakpoint implementation arises from a direct check of the event's overflow_handler hook. This check can be bypassed by an attacker, leading to potential security issues. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, an attacker may be able to execute arbitrary code or gain elevated privileges on a vulnerable system. The vulnerability was introduced in version v4.7 of the Linux Kernel and has been fixed in version v4.14.233.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by following best practices for system security, such as implementing strong access controls, regularly updating the Kernel, and monitoring for any suspicious activities.
Conclusion
The ARM Kernel's hw_breakpoint overflow handler check vulnerability poses a potential security risk to systems running the affected versions of the Linux Kernel. It is crucial to update the Kernel to version v4.14.233 or later to mitigate this vulnerability. Regularly updating the Kernel and following best practices for system security are essential to ensure the overall security of the system. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code or gain elevated privileges on a vulnerable system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file, like package-lock.json, and Vulert will analyze it in real-time.
While there is no specific workaround mentioned for this vulnerability, following best practices for system security can help mitigate the risk.
Yes, this vulnerability has been fixed in version v4.14.233 of the Linux Kernel.
You can obtain the updated version of the Linux Kernel from the official Linux Kernel repository.
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