CVE-2019-2021 Explained : Impact and Mitigation

Android devices are impacted by a vulnerability in the rw_t3t.cc file, potentially leading to information disclosure without additional privileges.

Understanding CVE-2019-2021

A lack of bounds check in the rw_t3t.cc file's rw_t3t_act_handle_ndef_detect_rsp function may result in an out-of-bound read, allowing the disclosure of local information without extra execution privileges.

What is CVE-2019-2021?

This vulnerability in Android versions 7.0 to 9 could be exploited with user interaction, posing a risk of information disclosure.

The Impact of CVE-2019-2021

The vulnerability could lead to the disclosure of local information without requiring additional execution privileges, potentially compromising user data.

Technical Details of CVE-2019-2021

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The issue arises from a lack of bounds check in the rw_t3t.cc file's rw_t3t_act_handle_ndef_detect_rsp function.

Affected Systems and Versions

Affected systems include Android versions 7.0, 7.1.1, 7.1.2, 8.0, 8.1, and 9.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction, making it crucial to address to prevent potential data breaches.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are essential to mitigate the risks associated with CVE-2019-2021.

Immediate Steps to Take

Update Android devices to the latest available patches.
Exercise caution while interacting with unknown or suspicious content.

Long-Term Security Practices

Regularly update and patch Android devices to address known vulnerabilities.
Educate users on safe browsing habits and potential security risks.

Patching and Updates

Stay informed about security bulletins and updates released by Android to address CVE-2019-2021.