CVE-2021-39777 : Vulnerability Insights and Analysis

This CVE-2021-39777 article provides insights into a security vulnerability affecting Android-12L that could lead to local information disclosure.

Understanding CVE-2021-39777

CVE-2021-39777 is a security vulnerability in Android-12L that allows determining app installations without querying permissions, potentially resulting in local information disclosure.

What is CVE-2021-39777?

The vulnerability in Telephony enables identifying app installations without permission queries.
Exploitation does not require user interaction but can disclose local information.

The Impact of CVE-2021-39777

Local information disclosure can occur without additional execution privileges.
Attackers can exploit the vulnerability without user interaction, raising risks of sensitive data exposure.

Technical Details of CVE-2021-39777

The technical aspects provide insight into the vulnerability's specifics and associated risks.

Vulnerability Description

Lack of permission check in Telephony allows determining installed apps without querying permissions.

Affected Systems and Versions

Product: Android
Version: Android-12L

Exploitation Mechanism

Exploiting the missing permission check in Telephony does not require user interaction.

Mitigation and Prevention

Protecting systems from CVE-2021-39777 involves immediate and long-term security measures.

Immediate Steps to Take

Update affected systems to the patched version promptly.
Monitor app installations and permissions to detect unauthorized activity.

Long-Term Security Practices

Enhance app security by minimizing unnecessary permissions.
Conduct regular security audits and penetration testing to identify vulnerabilities.

Patching and Updates

Apply security patches and updates released by Android for Android-12L to address the vulnerability.