ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook in Kernel
Summary
GSD-2021-1000221: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook. Affects Kernel versions >= 1879445dfa7bbd6fe21b09c5cc72f4934798afed, < dabe299425b1a53a69461fed7ac8922ea6733a25. No fix is published. How to fix ↓
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Background
The Kernel is a critical 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 Kernel is responsible for managing system resources, handling hardware interactions, and facilitating communication between different software components. This vulnerability affects the Kernel's hw_breakpoint module, which is responsible for handling hardware breakpoints. Hardware breakpoints allow developers to set breakpoints in the code to facilitate debugging and analysis. However, a flaw in the implementation of the overflow_handler hook in the hw_breakpoint module can lead to potential security vulnerabilities.
Vulnerability Detail
The vulnerability arises from a direct check of the event's overflow_handler hook in the hw_breakpoint module. This can potentially allow an attacker to exploit the system by manipulating the overflow_handler hook, leading to unauthorized access, privilege escalation, or denial of service. The impact and attack plausibility of this vulnerability have not been proven yet, but it poses a potential risk to the security and stability of the system. The vulnerability was introduced in Kernel version v4.7 and has been fixed in version v5.12.5.
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. The recommended approach is to update the Kernel to the fixed version.
Conclusion
The ARM: 9064/1: hw_breakpoint vulnerability in the Kernel's hw_breakpoint module poses a potential risk to the security and stability of the system. It is crucial to update the Kernel to version v5.12.5 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it has the potential to allow unauthorized access, privilege escalation, or denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and Vulert will analyze it in real-time.
There is no known exploit for this vulnerability at the moment. However, it is important to update the Kernel to the fixed version to mitigate any potential risks.
As there is no specific workaround mentioned, it is recommended to prioritize updating the Kernel to the fixed version as soon as possible.
You can find more information about this vulnerability in the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/.
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