CVE-2023-21082 : Vulnerability Insights and Analysis

This CVE record was published on April 19, 2023, by Google Android. The vulnerability involves a possible way to enumerate other users' contact phone numbers in the getNumberFromCallIntent function of NewOutgoingCallIntentBroadcaster.java, leading to local information disclosure. User execution privileges are needed, and no user interaction is required for exploitation. The affected product is Android, specifically versions Android-11, Android-12, Android-12L, and Android-13.

Understanding CVE-2023-21082

In this section, we will delve into the specifics of CVE-2023-21082, including its impact, technical details, affected systems, and potential mitigation strategies.

What is CVE-2023-21082?

CVE-2023-21082 is a vulnerability in the Android operating system that allows for the enumeration of other users' contact phone numbers, potentially resulting in local information disclosure. The exploit can occur in the getNumberFromCallIntent function of NewOutgoingCallIntentBroadcaster.java without requiring user interaction.

The Impact of CVE-2023-21082

The impact of CVE-2023-21082 is significant as it can lead to the exposure of sensitive contact information stored on the device, posing a risk to user privacy and security.

Technical Details of CVE-2023-21082

In this section, we will explore the technical aspects of CVE-2023-21082, including vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in getNumberFromCallIntent allows an attacker to obtain contact phone numbers of other users, exploiting a confused deputy scenario within the Android operating system.

Affected Systems and Versions

The affected systems include Android versions Android-11, Android-12, Android-12L, and Android-13. Users utilizing these versions are at risk of local information disclosure due to this vulnerability.

Exploitation Mechanism

Exploiting CVE-2023-21082 involves leveraging the getNumberFromCallIntent function in NewOutgoingCallIntentBroadcaster.java to enumerate contact phone numbers, without the need for user interaction.

Mitigation and Prevention

To address CVE-2023-21082 and mitigate its impact, certain steps can be taken by users and developers to enhance the security of affected systems.

Immediate Steps to Take

Users are advised to update their Android devices to the latest available security patches provided by Google. Additionally, exercise caution while sharing or storing sensitive contact information on the device.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about security updates from the device manufacturer can help prevent similar vulnerabilities in the future.

Patching and Updates

Google has released security bulletin 2023-04-01 addressing CVE-2023-21082. Users are encouraged to apply the necessary patches and updates to ensure the security of their Android devices.