CVE-2021-0456 Explained : Impact and Mitigation

Android Citadel chip firmware allows for a potential out-of-bounds write vulnerability, leading to local privilege escalation without the need for user interaction.

Understanding CVE-2021-0456

This CVE affects Android devices due to a missing bounds check in the Citadel chip firmware, potentially allowing local privilege escalation.

What is CVE-2021-0456?

CVE-2021-0456 is an elevation of privilege vulnerability in Android's Citadel chip firmware, which could be exploited for local privilege escalation without user interaction.

The Impact of CVE-2021-0456

The vulnerability poses a significant risk as it could allow attackers to gain system execution privileges on affected Android devices, resulting in a local escalation of privilege.

Technical Details of CVE-2021-0456

This section provides detailed technical information about the vulnerability affecting Android devices.

Vulnerability Description

The vulnerability stems from a missing bounds check in the Citadel chip firmware, enabling an out-of-bounds write that can be leveraged for local privilege escalation on Android devices.

Affected Systems and Versions

The vulnerability affects Android devices running the Android kernel, exposing them to the risk of local privilege escalation.

Exploitation Mechanism

Exploitation of CVE-2021-0456 does not require user interaction, making it a potent threat for adversaries seeking to elevate their privileges on Android devices.

Mitigation and Prevention

Protecting against CVE-2021-0456 requires immediate action combined with long-term security practices to safeguard Android devices.

Immediate Steps to Take

Users are advised to apply security patches promptly and follow recommended mitigation measures to prevent exploitation of this privilege escalation vulnerability.

Long-Term Security Practices

Maintaining up-to-date software, implementing secure coding practices, and regularly monitoring for security advisories are crucial for enhancing the overall security posture of Android devices.

Patching and Updates

Regularly check for security updates from the official Android security bulletin and apply patches as soon as they are available to mitigate the risk of CVE-2021-0456.