CVE-2021-39662 : Vulnerability Insights and Analysis

CVE-2021-39662 is a vulnerability in the Android operating system that allows an attacker to gain unauthorized access to media provider collections. This could lead to a local escalation of privilege without requiring user interaction.

Understanding CVE-2021-39662

CVE-2021-39662 is classified as an elevation of privilege vulnerability in the Android system, impacting versions Android-11 and Android-12.

What is CVE-2021-39662?

In the checkUriPermission function of MediaProvider.java, an absence of a permission check enables potential unauthorized access to media provider collections, facilitating a local privilege escalation exploit. The attack can occur without the need for user interaction.

The Impact of CVE-2021-39662

The vulnerability poses a risk of local escalation of privilege, requiring execution privileges from the user, but not their direct involvement in the exploit.

Technical Details of CVE-2021-39662

CVE-2021-39662 involves the following technical aspects:

Vulnerability Description

The flaw originates in the checkUriPermission function of MediaProvider.java, allowing unauthorized access to media provider collections.

Affected Systems and Versions

Product: Android
Versions: Android-11, Android-12

Exploitation Mechanism

The vulnerability can be exploited locally without user interaction, exploiting the missing permission check in MediaProvider.java.

Mitigation and Prevention

To address CVE-2021-39662 and enhance security, consider the following measures:

Immediate Steps to Take

Apply security patches from the official Android Security Bulletin.
Monitor for any unusual activities related to media provider access.

Long-Term Security Practices

Regularly update the Android operating system to the latest version.
Implement strict permission controls for media provider access.

Patching and Updates

Stay informed about security updates and promptly apply patches released by Google for the Android operating system.