CVE-2021-39697 : Vulnerability Insights and Analysis

Android 11 and 12 are impacted by a vulnerability in checkFileUriDestination of DownloadProvider.java, potentially allowing a bypass of external storage protection.

Understanding CVE-2021-39697

This CVE involves an elevation of privilege issue on Android devices.

What is CVE-2021-39697?

The vulnerability in DownloadProvider.java may enable attackers to bypass external storage protection, leading to a local privilege escalation without the need for user interaction.

The Impact of CVE-2021-39697

The CVE allows for an elevation of privilege attack on Android devices using Android 11 and 12 versions.

Technical Details of CVE-2021-39697

This section dives into the specifics of the vulnerability.

Vulnerability Description

The issue in checkFileUriDestination of DownloadProvider.java permits a way to bypass external storage private directories protection, risking local privilege escalation.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit this vulnerability without requiring user interaction.

Mitigation and Prevention

Learn how to protect your systems against CVE-2021-39697.

Immediate Steps to Take

Apply security patches promptly to mitigate the risk of exploitation.
Monitor official Android security updates for relevant patches.

Long-Term Security Practices

Implement least privilege access controls to limit potential damage from privilege escalation attacks.
Regularly review and update permission settings on Android devices.

Patching and Updates

Keep your Android devices up to date with the latest security patches provided by Google.