CVE-2023-21035 : What You Need to Know

This CVE record details a security vulnerability identified as CVE-2023-21035, which was published on March 24, 2023, by Google Android. The vulnerability involves the potential for an application to acquire permissions previously granted to another app with the same package name, leading to a permissions bypass in multiple functions of BackupHelper.java. This could result in local escalation of privilege without requiring additional execution privileges, with no user interaction needed for exploitation.

Understanding CVE-2023-21035

This section will delve into the specifics of CVE-2023-21035, including its description, impact, technical details, affected systems and versions, as well as mitigation and prevention methods.

What is CVE-2023-21035?

CVE-2023-21035 pertains to a vulnerability in multiple functions of BackupHelper.java within the Android operating system. It enables an app to obtain permissions previously granted to another app sharing the same package name, thereby bypassing permissions and potentially leading to a local privilege escalation exploit.

The Impact of CVE-2023-21035

The impact of CVE-2023-21035 lies in the ability of malicious apps to elevate their privileges without the need for additional permissions, thereby posing a risk of unauthorized access and control within the Android system.

Technical Details of CVE-2023-21035

This section will provide a detailed overview of the technical aspects related to CVE-2023-21035, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in BackupHelper.java allows an app to access permissions granted to another app with the same package name, potentially leading to a permissions bypass and local privilege escalation within the Android system.

Affected Systems and Versions

The affected product is Android, specifically version Android-13. Users operating on this version are at risk of exploitation due to the permissions bypass vulnerability in BackupHelper.java.

Exploitation Mechanism

Exploiting CVE-2023-21035 involves leveraging the permissions bypass capability in BackupHelper.java to acquire permissions previously granted to another app with the same package name, enabling the unauthorized elevation of privileges.

Mitigation and Prevention

In order to address CVE-2023-21035 and enhance the security of Android systems, it is crucial to implement immediate steps, adopt long-term security practices, and prioritize patching and updates.

Immediate Steps to Take

Users and administrators should exercise caution when downloading and installing apps, verify permissions requested by applications, and regularly monitor for security updates to mitigate the risk of privilege escalation through CVE-2023-21035.

Long-Term Security Practices

Implementing robust security measures, such as app sandboxing, strict permission controls, and regular security audits, can help prevent unauthorized access and privilege escalation within the Android ecosystem.

Patching and Updates

Google Android is likely to release patches and updates to address CVE-2023-21035. Users are advised to promptly apply these patches, stay informed about security advisories, and consistently update their devices to safeguard against potential exploitation of this vulnerability.