CVE-2021-39695 : What You Need to Know

This article discusses CVE-2021-39695, a vulnerability in Android-11 that could allow a local escalation of privilege without user interaction.

Understanding CVE-2021-39695

CVE-2021-39695 relates to a possible permission bypass in the BasePermission.java file, potentially leading to an elevation of privilege.

What is CVE-2021-39695?

The vulnerability involves a logic error in the code, allowing for a local escalation of privilege in Android-11 without requiring user interaction.

The Impact of CVE-2021-39695

Attackers could exploit this vulnerability to gain elevated privileges on the affected Android-11 systems.

Technical Details of CVE-2021-39695

This section provides more specific technical details about the vulnerability.

Vulnerability Description

The issue lies in the createOrUpdate function of BasePermission.java, which fails to properly enforce permission checks, leading to a potential bypass.

Affected Systems and Versions

Product: Android
Versions Affected: Android-11

Exploitation Mechanism

Attackers can exploit the logic error in BasePermission.java to bypass permission checks and escalate privileges locally on Android-11.

Mitigation and Prevention

Learn how to protect your systems from CVE-2021-39695.

Immediate Steps to Take

Monitor security bulletins and updates from Android for patches related to CVE-2021-39695.
Consider restricting access privileges until a patch is available.

Long-Term Security Practices

Regularly update your Android devices to the latest secure versions.
Implement strict permission control policies to prevent privilege escalation.
Use security tools to detect and mitigate similar vulnerabilities.

Patching and Updates

Apply patches released by Android promptly to address CVE-2021-39695 and enhance the system's security.