ACPI: CPPC: Out of Bounds Access Vulnerability in Kernel
Summary
GSD-2022-1002204: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data. Affects Kernel versions >= 337aadff8e4567e39669e07d9a88b789d78458b5, < cb249f8c00f40dba83b7da8207ac14ca46e9ec9e. 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 functions and services to enable the proper functioning of the system. The ACPI (Advanced Configuration and Power Interface) subsystem within the Kernel handles power management and configuration of hardware devices. One of the features of ACPI is CPPC (Collaborative Processor Performance Control), which allows for dynamic adjustment of processor performance based on workload. However, a vulnerability has been identified in the Kernel's ACPI CPPC implementation that could lead to out of bounds access when parsing _CPC data.
Vulnerability Detail
The vulnerability in the ACPI CPPC implementation arises from a flaw in the parsing of _CPC (Collaborative Processor Control) data. When processing this data, the Kernel does not properly validate the input, leading to an out of bounds access issue. An attacker could exploit this vulnerability by crafting a malicious ACPI table, which could result in arbitrary code execution or denial of service attacks. The impact and attack plausibility of this vulnerability have not been proven yet. This vulnerability was introduced in version v4.4 of the Linux Kernel and has been fixed in version v5.4.189.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the official patch or update the Kernel to the fixed version to mitigate the risk of exploitation.
Conclusion
In conclusion, the ACPI CPPC out of bounds access vulnerability in the Linux Kernel could potentially lead to arbitrary code execution or denial of service attacks. It is crucial to update the Kernel to version v5.4.189 or later to mitigate the risk. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could potentially lead to arbitrary code execution or denial of service attacks.
You can use the Vulert Playground (https://vulert.com/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 this one.
As of now, there is no known exploit for this vulnerability. However, it is crucial to apply the necessary updates to mitigate the risk.
Yes, this vulnerability can be exploited remotely if an attacker can send a crafted ACPI table to the target system.
This vulnerability affects all Linux distributions that use the affected versions of the Kernel. It is recommended to update the Kernel to the fixed version on all affected distributions.
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