CVE-2021-0481 Explained : Impact and Mitigation

A vulnerability in Android allows unauthorized access to files, potentially leading to local privilege escalation. This CVE impacts Android versions 8.1, 9, 10, and 11, requiring user interaction for exploitation.

Understanding CVE-2021-0481

This section delves into the nature of the vulnerability and its impact.

What is CVE-2021-0481?

The vulnerability exists in the onActivityResult function of EditUserPhotoController.java in Android. It enables attackers to access unauthorized files through an unexpected URI handler, facilitating local privilege escalation without needing additional permissions.

The Impact of CVE-2021-0481

The security flaw poses a risk of local elevation of privilege on affected Android devices, potentially compromising user data and system integrity.

Technical Details of CVE-2021-0481

Explore the technical aspects of the CVE and its implications.

Vulnerability Description

The vulnerability arises from improper handling of URIs in the EditUserPhotoController.java file, allowing unauthorized file access by attackers.

Affected Systems and Versions

Android versions 8.1, 9, 10, and 11 are affected by this CVE.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction to manipulate the unexpected URI handler and gain unauthorized access to files.

Mitigation and Prevention

Discover the measures to mitigate the risk and prevent exploitation of this vulnerability.

Immediate Steps to Take

Users are advised to be cautious while interacting with unexpected URIs and to avoid granting unnecessary permissions to applications.

Long-Term Security Practices

Implementing a strict app permission policy and staying updated with security bulletins can enhance the security posture of Android devices.

Patching and Updates

Regularly updating Android devices to the latest security patches and versions is crucial for safeguarding against CVE-2021-0481.