CVE-2021-0436 Explained : Impact and Mitigation

Android has been found to have a vulnerability in CryptoPlugin::decrypt of CryptoPlugin.cpp, leading to a potential out-of-bounds read due to integer overflow. This could result in local information disclosure without requiring additional execution privileges.

Understanding CVE-2021-0436

This vulnerability, identified as CVE-2021-0436, impacts various versions of Android, including Android 8.1, 9, 10, and 11.

What is CVE-2021-0436?

The vulnerability in CryptoPlugin::decrypt of CryptoPlugin.cpp could allow for local information disclosure without the need for user interaction.

The Impact of CVE-2021-0436

If exploited, this vulnerability could potentially lead to local information disclosure without requiring additional permissions or user interaction.

Technical Details of CVE-2021-0436

The technical details of CVE-2021-0436 include:

Vulnerability Description

The vulnerability stems from an out-of-bounds read due to integer overflow in CryptoPlugin::decrypt of CryptoPlugin.cpp.

Affected Systems and Versions

The affected systems include Android versions 8.1, 9, 10, and 11.

Exploitation Mechanism

Exploiting this vulnerability does not require user interaction, making it a concerning issue for Android users.

Mitigation and Prevention

To address CVE-2021-0436, consider the following mitigation strategies:

Immediate Steps to Take

Stay updated with security advisories from Google for Android.
Implement necessary patches and updates provided by the vendor.

Long-Term Security Practices

Regularly monitor for security bulletins and updates related to Android.
Adopt secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Ensure timely installation of security patches released by Android to mitigate the risk associated with CVE-2021-0436.