CVE-2021-39786 Explained : Impact and Mitigation

This article provides details about CVE-2021-39786, a vulnerability in Android-12L related to NFC that could lead to privilege escalation.

Understanding CVE-2021-39786

This section explores the nature and impact of the CVE-2021-39786 vulnerability.

What is CVE-2021-39786?

CVE-2021-39786 is a vulnerability in Android-12L's NFC that allows for an out of bounds write without the necessary bounds check, potentially enabling local privilege escalation without user interaction.

The Impact of CVE-2021-39786

The vulnerability requires system execution privileges for exploitation, posing a risk of local escalation of privilege.

Technical Details of CVE-2021-39786

In this section, you will find specific technical details regarding CVE-2021-39786.

Vulnerability Description

The vulnerability in NFC of Android-12L allows for an out of bounds write, lacking required bounds checking, which could enable local privilege escalation.

Affected Systems and Versions

Product: Android
Version: Android-12L

Exploitation Mechanism

The vulnerability does not necessitate user interaction for exploitation, requiring only system execution privileges.

Mitigation and Prevention

Here, we present methods to mitigate and prevent the exploitation of CVE-2021-39786.

Immediate Steps to Take

Patch systems to address the vulnerability promptly.
Monitor and restrict system privileges to limit the impact of potential attacks.
Stay informed about security updates from the vendor.

Long-Term Security Practices

Implement robust security policies and access controls.
Conduct regular security audits and assessments to identify vulnerabilities proactively.

Patching and Updates

Regularly apply security patches and updates provided by Android to ensure protection against known vulnerabilities.