CVE-2023-21105 : What You Need to Know

This CVE record, assigned by Google Android, highlights a vulnerability in multiple functions of ChooserActivity.java that could result in a cross-user media read leading to local information disclosure on Android devices without requiring additional execution privileges.

Understanding CVE-2023-21105

This section delves into the specifics of CVE-2023-21105, shedding light on the nature of the vulnerability and its potential impact on affected systems.

What is CVE-2023-21105?

CVE-2023-21105 is a vulnerability found in multiple functions of ChooserActivity.java on Android devices. The issue stems from a confused deputy scenario, potentially leading to a cross-user media read and subsequent local information disclosure. Importantly, exploitation of this vulnerability does not necessitate user interaction.

The Impact of CVE-2023-21105

The impact of CVE-2023-21105 centers around the risk of local information disclosure on affected Android systems. By exploiting the vulnerability, threat actors could potentially access sensitive media content across different user profiles without the need for additional permissions or user interaction.

Technical Details of CVE-2023-21105

This section provides a more detailed look at the technical aspects of CVE-2023-21105, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in ChooserActivity.java allows for a possible cross-user media read due to a confused deputy scenario. This paves the way for local information disclosure without requiring elevated execution privileges, posing a threat to user data privacy.

Affected Systems and Versions

The affected product in this case is Android, with versions including Android-11, Android-12, Android-12L, and Android-13 all being vulnerable to this issue. It is crucial for users on these versions to be aware of the potential risk posed by CVE-2023-21105.

Exploitation Mechanism

Exploiting CVE-2023-21105 involves leveraging the confused deputy scenario in ChooserActivity.java to perform a cross-user media read, enabling threat actors to access sensitive information locally without the need for any additional execution privileges or user interaction.

Mitigation and Prevention

In order to protect systems from the risks associated with CVE-2023-21105, prompt action is necessary. This section outlines immediate steps to take, long-term security practices, and the significance of timely patching and updates.

Immediate Steps to Take

Users are advised to exercise caution when interacting with media content on Android devices following the disclosure of CVE-2023-21105. Additionally, implementing security best practices and remaining vigilant about potential information disclosure threats is crucial.

Long-Term Security Practices

To enhance overall security posture, long-term security practices such as regular security audits, user awareness training, and secure coding practices should be integrated into the organization's cybersecurity strategy.

Patching and Updates

It is imperative for users of affected Android versions to apply relevant security patches and system updates provided by Google to mitigate the risk of local information disclosure posed by CVE-2023-21105. Stay proactive in ensuring that devices are running on the latest secure software versions.