CVE-2023-21093 : Security Advisory and Response

This CVE-2023-21093 relates to a vulnerability found in Android operating systems that could potentially allow an attacker to access files in a directory belonging to other applications through a path traversal error, leading to local privilege escalation without requiring additional execution privileges.

Understanding CVE-2023-21093

This section delves into the specifics of CVE-2023-21093 and its implications.

What is CVE-2023-21093?

The vulnerability identified in CVE-2023-21093 resides in the extractRelativePath function of FileUtils.java within the Android operating system. It presents a pathway for threat actors to navigate directories of other applications, potentially compromising the security and integrity of the system.

The Impact of CVE-2023-21093

The exploitation of CVE-2023-21093 could result in local escalation of privileges, granting unauthorized access to sensitive files and information on the affected Android device. This could be exploited without requiring any form of user interaction, posing a significant risk to user data and system confidentiality.

Technical Details of CVE-2023-21093

This section provides an in-depth look into the technical aspects of CVE-2023-21093, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in extractRelativePath of FileUtils.java within Android allows for a path traversal error, enabling unauthorized access to files in directories belonging to other applications.

Affected Systems and Versions

The following Android versions are impacted by CVE-2023-21093: Android-11, Android-12, Android-12L, and Android-13.

Exploitation Mechanism

By leveraging the path traversal error in FileUtils.java, threat actors can maneuver through directories of different applications, potentially leading to the unauthorized access of sensitive files and data.

Mitigation and Prevention

Taking proactive measures to mitigate the risks associated with CVE-2023-21093 is crucial to safeguarding Android devices from potential exploitation.

Immediate Steps to Take

Update: Ensure that the affected Android versions (Android-11, Android-12, Android-12L, Android-13) are promptly updated with the latest security patches provided by the manufacturer.
Restrict Permissions: Review and restrict app permissions to limit access to device resources and sensitive data.

Long-Term Security Practices

Regular Security Audits: Conduct periodic security audits to identify and address vulnerabilities within the Android operating system.
User Education: Educate users on safe browsing habits, app downloads, and security best practices to prevent potential exploitation.

Patching and Updates

Vendors are advised to release security patches and updates to address CVE-2023-21093 promptly. Users should prioritize installing these updates to ensure the security and integrity of their Android devices.