CVE-2022-20112 : Vulnerability Insights and Analysis

Android versions 10, 11, 12, and 12L are affected by CVE-2022-20112, allowing a guest user to change private DNS settings through a permissions bypass. This could result in a local privilege escalation without requiring additional execution privileges.

Understanding CVE-2022-20112

This CVE impacts Android devices running versions 10, 11, 12, and 12L, potentially enabling unauthorized changes in private DNS settings.

What is CVE-2022-20112?

The vulnerability in PrivateDnsPreferenceController.java allows guest users to manipulate private DNS settings, leading to a local escalation of privileges.

The Impact of CVE-2022-20112

Exploitation of this vulnerability could result in a local elevation of privileges, posing a risk of unauthorized access to sensitive data and functionalities on the affected Android devices.

Technical Details of CVE-2022-20112

This section provides further insights into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

In the getAvailabilityStatus of PrivateDnsPreferenceController.java, the vulnerability allows a guest user to alter private DNS settings, bypassing permissions.

Affected Systems and Versions

Android versions 10, 11, 12, and 12L are affected by this vulnerability, making devices running these versions susceptible to unauthorized changes in private DNS configurations.

Exploitation Mechanism

The vulnerability is exploited by leveraging the permissions bypass in PrivateDnsPreferenceController.java to modify private DNS settings, facilitating local privilege escalation.

Mitigation and Prevention

To safeguard devices from the CVE-2022-20112 vulnerability, immediate action and long-term security practices are essential.

Immediate Steps to Take

Users are advised to apply security patches and updates released by Android to mitigate the risk of exploitation through this vulnerability.

Long-Term Security Practices

Implementing robust security measures, such as regular software updates, monitoring for unauthorized changes, and restricting guest user privileges, can help prevent similar vulnerabilities.

Patching and Updates

Staying vigilant about security advisories and promptly applying patches provided by Android is crucial for addressing security vulnerabilities like CVE-2022-20112.