CVE-2021-39748 : Security Advisory and Response

This article provides insights into the CVE-2021-39748 vulnerability affecting Android-12L.

Understanding CVE-2021-39748

CVE-2021-39748 is an information disclosure vulnerability in InputMethodEditor on Android-12L.

What is CVE-2021-39748?

The vulnerability allows access to files accessible to Settings via an unsafe PendingIntent, leading to local information disclosure.
Exploitation does not require user interaction.

The Impact of CVE-2021-39748

Potential local information disclosure without additional execution privileges.

Technical Details of CVE-2021-39748

CVE-2021-39748 has the following technical details:

Vulnerability Description

In InputMethodEditor, an unsafe PendingIntent allows access to sensitive files.

Affected Systems and Versions

Product: Android
Versions Affected: Android-12L

Exploitation Mechanism

Unauthorized access through an insecure PendingIntent leading to information disclosure.

Mitigation and Prevention

Understanding the mitigation strategies for CVE-2021-39748 is crucial.

Immediate Steps to Take

Apply security patches from the Android security bulletin.
Monitor for any unusual file access and review app permissions.

Long-Term Security Practices

Regularly update the device OS to ensure security patches are up to date.
Use reputable security software to detect and prevent vulnerabilities.

Patching and Updates

Keep the Android OS updated to the latest version to mitigate CVE-2021-39748.