CVE-2020-27098 : Security Advisory and Response

Android 11 has a vulnerability that allows unauthorized access to contacts, potentially leading to local information disclosure without requiring additional privileges.

Understanding CVE-2020-27098

This CVE involves an elevation of privilege vulnerability in Android 11.

What is CVE-2020-27098?

In the checkGrantUriPermission of UriGrantsManagerService.java, a permissions bypass can enable access to contacts, posing a risk of local information exposure without the need for extra execution privileges.

The Impact of CVE-2020-27098

The vulnerability could result in unauthorized access to contacts on Android 11 devices, potentially leading to the disclosure of sensitive local information.

Technical Details of CVE-2020-27098

This section provides technical insights into the vulnerability.

Vulnerability Description

The issue lies in the checkGrantUriPermission function, allowing a potential permissions bypass to access contacts, leading to local information disclosure.

Affected Systems and Versions

Product: Android
Versions Affected: Android 11

Exploitation Mechanism

Exploitation does not require user interaction, making it easier for threat actors to access contacts.

Mitigation and Prevention

Protecting against CVE-2020-27098 is crucial for maintaining the security of Android 11 devices.

Immediate Steps to Take

Apply security patches promptly to address the vulnerability.
Monitor for any unauthorized access to contacts or sensitive information.

Long-Term Security Practices

Regularly update the device's operating system to the latest version.
Implement security best practices to prevent unauthorized access to sensitive data.

Patching and Updates

Stay informed about security bulletins and updates from Android to patch vulnerabilities like CVE-2020-27098.