CVE-2022-42756 Explained : Impact and Mitigation

This article provides detailed information about CVE-2022-42756, a vulnerability identified in Unisoc sensor drivers that could result in local denial of service attacks on the kernel.

Understanding CVE-2022-42756

CVE-2022-42756 is a vulnerability found in sensor drivers of Unisoc devices, potentially leading to local denial of service in the kernel.

What is CVE-2022-42756?

The vulnerability arises from a missing bounds check in the sensor driver code, creating a buffer overflow risk, allowing attackers to trigger denial of service attacks on the kernel.

The Impact of CVE-2022-42756

Exploitation of this vulnerability could enable local attackers to crash the system, causing a denial of service condition and disrupting normal device functionality.

Technical Details of CVE-2022-42756

This section delves into the technical aspects of CVE-2022-42756 to provide a comprehensive understanding of the vulnerability.

Vulnerability Description

The vulnerability is classified as CWE-120 - Classic Buffer Overflow, indicating a common programming flaw where input exceeds the capacity of the allocated buffer, potentially corrupting data and leading to system crashes.

Affected Systems and Versions

Unisoc devices running the SC9863A, SC9832E, SC7731E, T610, T310, T606, T760, T610, T618, T606, T612, T616, T760, T770, T820, and S8000 processors with Android 10, 11, or 12 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit the buffer overflow by sending specially crafted inputs to the vulnerable sensor driver, triggering the overflow and causing a denial of service in the kernel.

Mitigation and Prevention

This section outlines steps to mitigate the risks associated with CVE-2022-42756 and prevent potential exploitation.

Immediate Steps to Take

Apply security patches provided by Unisoc to fix the vulnerability in affected devices.
Monitor for any suspicious activities or crashes that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Implement secure coding practices to prevent buffer overflow vulnerabilities in software development.
Regularly update device firmware and software to address security issues and enhance system resilience.

Patching and Updates

Stay informed about security updates released by Unisoc for the affected devices and ensure prompt installation to protect against potential exploitation of CVE-2022-42756.