CVE-2021-39671 Explained : Impact and Mitigation

This article provides details about CVE-2021-39671, a vulnerability in Android-12 that could lead to information disclosure.

Understanding CVE-2021-39671

CVE-2021-39671 is a vulnerability in Android-12 that may allow an attacker to obtain sensitive information without requiring additional execution privileges or user interaction.

What is CVE-2021-39671?

The vulnerability exists in the code generated by aidl_const_expressions.cpp, where uninitialized data could result in an out-of-bounds read. This flaw has the potential to lead to information disclosure.

The Impact of CVE-2021-39671

The vulnerability could result in an elevation of privilege, enabling an attacker to gain access to sensitive data without the need for extra permissions or user interaction.

Technical Details of CVE-2021-39671

Vulnerability Description

The issue arises from uninitialized data in code generated by aidl_const_expressions.cpp, potentially leading to an out-of-bounds read and information disclosure.

Affected Systems and Versions

Product: Android
Version: Android-12

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to read sensitive information without requiring extra privileges or user interaction.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Android for CVE-2021-39671.
Monitor for any unusual activities indicating exploitation of the vulnerability.

Long-Term Security Practices

Regularly update Android devices to the latest software versions to address known vulnerabilities.
Implement strong access controls and permissions to limit potential attack surfaces.

Patching and Updates

Ensure that all affected systems running Android-12 are updated with the latest security patches from Android to mitigate the risk of exploitation.