CVE-2021-0603 : Security Advisory and Response

Android users need to be aware of a vulnerability in the ContactSelectionActivity.java file that could potentially allow unauthorized access to contacts through a tapjacking attack. This could result in a local privilege escalation, requiring user interaction for exploitation.

Understanding CVE-2021-0603

This CVE identifies a vulnerability in Android devices that could lead to an elevation of privilege if exploited.

What is CVE-2021-0603?

The vulnerability lies in the onCreate function of ContactSelectionActivity.java, posing a risk of contact access without permission through a tapjacking/overlay attack.

The Impact of CVE-2021-0603

If successfully exploited, this vulnerability could result in a local escalation of privilege on Android devices, with the attacker needing user interaction for the exploit.

Technical Details of CVE-2021-0603

This section dives deeper into the specifics of the CVE.

Vulnerability Description

The vulnerability allows unauthorized access to contacts on Android-11 devices, potentially leading to a local privilege escalation.

Affected Systems and Versions

Android devices running Android-11 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability through a tapjacking/overlay attack, gaining unauthorized access to contacts.

Mitigation and Prevention

Protecting Android devices from CVE-2021-0603 requires immediate action and long-term security practices.

Immediate Steps to Take

Android users are advised to be cautious about granting permissions and interacting with suspicious overlays to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update devices, be cautious when granting permissions, and avoid interacting with unknown overlays to enhance security.

Patching and Updates

Stay informed about security bulletins and promptly install security patches to safeguard against CVE-2021-0603.