Vulnerability in Kernel: arm64 stackleak
Summary
GSD-2022-1003406: arm64: stackleak: fix current_top_of_stack(). Affects Kernel versions >= 0b3e336601b82c6afa0e9cf21db9cb8793e25399, < e7308391df97c1891b642cfb4b9be8a9a0a4ff26. 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 security and stability of the system. The arm64 architecture is specifically designed for 64-bit ARM processors. The stackleak feature in the Kernel aims to protect the kernel stack from being leaked to user space. However, a vulnerability has been identified in the arm64 stackleak implementation.
Vulnerability Detail
The arm64 stackleak vulnerability, identified as GSD-2022-1003406, allows an attacker to bypass the stackleak protection mechanism and potentially gain unauthorized access to sensitive kernel stack information. This vulnerability was introduced in version v4.19 of the Linux Kernel and has been fixed in version v5.15.46. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, it could lead to the disclosure of sensitive data or facilitate further attacks on the system.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.46 or later. This update includes the necessary patch to address the arm64 stackleak vulnerability. Users can obtain the updated Kernel from the official Linux Kernel repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
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Workaround
No specific workaround has been provided for this vulnerability. It is advised to apply the official patch by updating the Linux Kernel to the recommended version.
Conclusion
The arm64 stackleak vulnerability in the Kernel poses a potential risk of unauthorized access to sensitive kernel stack information. It is crucial to update the Linux Kernel to version v5.15.46 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
If successfully exploited, this vulnerability could allow an attacker to access sensitive kernel stack information, potentially leading to the disclosure of sensitive data or facilitating further attacks on the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including the arm64 stackleak vulnerability.
At the time of this report, no known exploits for this vulnerability have been disclosed. However, it is important to apply the recommended patch to mitigate any potential risks.
The arm64 stackleak vulnerability requires local access to the system to exploit it. Remote exploitation is not possible without prior access to the targeted system.
The recommended solution is to update the Linux Kernel to the fixed version. However, if updating the Kernel is not feasible, it is advised to follow best security practices, such as restricting access to the affected system and implementing additional security measures to mitigate potential risks.
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