CVE-2021-0996 Explained : Impact and Mitigation

A detailed analysis of CVE-2021-0996 focusing on the vulnerability, its impact, technical details, and mitigation steps.

Understanding CVE-2021-0996

This section provides insights into the CVE-2021-0996 vulnerability affecting Android-12.

What is CVE-2021-0996?

CVE-2021-0996 involves an out-of-bounds read vulnerability in nfaHciCallback of HciEventManager.cpp in Android-12. The flaw could potentially allow local information disclosure over NFC without requiring user interaction.

The Impact of CVE-2021-0996

The vulnerability could lead to local information disclosure over NFC, posing a risk of exposing sensitive data with system execution privileges.

Technical Details of CVE-2021-0996

Delving into the technical aspects of the CVE-2021-0996 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises due to a missing bounds check in nfaHciCallback of HciEventManager.cpp, leading to a potential out-of-bounds read.

Affected Systems and Versions

The vulnerability affects Android-12 devices, making them susceptible to local information disclosure via NFC.

Exploitation Mechanism

Exploiting CVE-2021-0996 does not require user interaction, as an attacker can leverage the flaw to disclose sensitive data over NFC.

Mitigation and Prevention

Explore the recommended steps to mitigate the risks associated with CVE-2021-0996 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to apply security patches promptly to address the vulnerability and enhance system security.

Long-Term Security Practices

Implementing robust security practices, such as restricting NFC access and monitoring for unusual activities, can bolster long-term security.

Patching and Updates

Regularly updating the Android-12 operating system with the latest security patches from Google is crucial for safeguarding against CVE-2021-0996.