CVE-2021-0882 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-0882, a vulnerability in the PowerVR kernel driver on Android that could lead to local privilege escalation without the need for additional execution privileges.

Understanding CVE-2021-0882

This section explores what CVE-2021-0882 is and its impact.

What is CVE-2021-0882?

CVE-2021-0882 is a vulnerability found in PVRSRVBridgeRGXKickSync of the PowerVR kernel driver, allowing for potential integer overflow and out-of-bounds heap access, leading to local privilege escalation.

The Impact of CVE-2021-0882

The impact of this vulnerability is significant as it enables attackers to escalate their privileges without requiring further execution permissions, posing a serious risk to affected Android devices.

Technical Details of CVE-2021-0882

This section delves into the technical aspects of CVE-2021-0882, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a missing size check in the PowerVR kernel driver, enabling an integer overflow that could potentially trigger out-of-bounds heap access.

Affected Systems and Versions

The affected system is Android, specifically Android SoC, with the identified version being vulnerable to the exploit.

Exploitation Mechanism

The exploitation of CVE-2021-0882 involves leveraging the integer overflow in PVRSRVBridgeRGXKickSync to achieve out-of-bounds heap access and subsequently escalate privileges on the local device.

Mitigation and Prevention

This section outlines the steps that users and organizations can take to mitigate the risks posed by CVE-2021-0882 and prevent potential exploitation.

Immediate Steps to Take

Immediate actions include applying relevant security patches and updates provided by the vendor to address the vulnerability in the PowerVR kernel driver.

Long-Term Security Practices

Implementing robust security measures, such as regular security assessments, network segmentation, and access control, can enhance overall system security and mitigate similar risks in the future.

Patching and Updates

Regularly monitoring for security updates from Android and promptly applying patches is crucial to safeguarding devices against known vulnerabilities like CVE-2021-0882.