ACPI: CPPC: Avoid out of bounds access when parsing _CPC data in Kernel
Summary
GSD-2022-1002412: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data. Affects Kernel versions >= 337aadff8e4567e39669e07d9a88b789d78458b5, < d208ea44e25b31db5a4d5e8c31df51787a3e9303. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential services, such as device management, memory management, and process scheduling. The ACPI (Advanced Configuration and Power Interface) subsystem within the Kernel handles power management and configuration of hardware devices. One of the ACPI features is CPPC (Collaborative Processor Performance Control), which allows the operating system to communicate with the processor to optimize performance and power consumption. However, a vulnerability exists in the CPPC implementation that can lead to out of bounds access when parsing _CPC (Collaborative Processor Control) data.
Vulnerability Detail
The vulnerability in the ACPI CPPC implementation arises from a lack of proper bounds checking when parsing _CPC data. This can potentially allow an attacker to access memory beyond the intended boundaries, leading to information disclosure or even arbitrary code execution. The vulnerability was introduced in version v4.4 of the Linux Kernel and was fixed in version v4.14.276. The impact and attack plausibility of this vulnerability have not been proven yet.
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.
Conclusion
The ACPI CPPC vulnerability in the Linux Kernel can lead to out of bounds access when parsing _CPC data. It is crucial to update the Kernel to version v4.14.276 or later to mitigate the risk of information disclosure or arbitrary code execution. No specific workaround has been mentioned for this vulnerability. For more information and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could potentially lead to information disclosure or arbitrary code execution.
You can check if your system is affected by this vulnerability by verifying the version of the Linux Kernel installed. If your system is running a version prior to v4.14.276, it is recommended to update to the latest version.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to apply the necessary updates to mitigate the risk.
For more details about this vulnerability, you can refer to the source link provided in the database_specific section of this report.
For further support on vulnerability remediation, you can contact info@devnack.com.
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