CVE-2023-21254 : Exploit Details and Defense Strategies

This CVE-2023-21254 was assigned by Google to a vulnerability in the Android operating system on July 12, 2023. The vulnerability allows for local escalation of privilege without requiring additional execution privileges and does not need user interaction for exploitation.

Understanding CVE-2023-21254

This section will delve into what CVE-2023-21254 is about, its impact, technical details, and how to mitigate and prevent exploitation.

What is CVE-2023-21254?

The vulnerability identified as CVE-2023-21254 lies in the getCurrentState function of OneTimePermissionUserManager.java in the Android operating system. It involves a logic error that can allow malicious actors to retain one-time permissions even after the app has been terminated. This flaw could be exploited to achieve local escalation of privilege without requiring any additional execution privileges.

The Impact of CVE-2023-21254

The impact of CVE-2023-21254 is significant as it enables attackers to potentially elevate their privileges locally on the affected device. This could lead to unauthorized access to sensitive information or perform malicious activities without the user's knowledge or consent. The exploitation of this vulnerability poses a serious threat to the security and integrity of the Android operating system.

Technical Details of CVE-2023-21254

To better understand CVE-2023-21254, let's explore the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in getCurrentState of OneTimePermissionUserManager.java allows for the retention of one-time permissions post-app termination due to a logic error. This flaw paves the way for local escalation of privilege without the need for additional execution privileges, presenting a security risk to the Android system.

Affected Systems and Versions

The CVE-2023-21254 vulnerability affects the Android operating system specifically version 13. Users operating on this version are exposed to the risk of local privilege escalation through the exploitation of the identified flaw.

Exploitation Mechanism

Exploiting CVE-2023-21254 does not require user interaction, making it more dangerous. By leveraging the logic error in the code, threat actors can retain one-time permissions even after the associated app has been killed, enabling them to escalate their privileges and potentially carry out malicious activities.

Mitigation and Prevention

Protecting systems from CVE-2023-21254 requires immediate action and the implementation of long-term security practices to safeguard against similar vulnerabilities in the future.

Immediate Steps to Take

Users and administrators are advised to apply relevant patches and updates provided by Google to address the CVE-2023-21254 vulnerability promptly. Additionally, monitoring for any unauthorized activities or privilege escalations on affected systems is crucial to mitigate potential risks.

Long-Term Security Practices

In the long term, ensuring that systems are regularly updated with the latest security patches and fixes is essential to prevent exploitation of known vulnerabilities. Employing robust security measures, such as access controls and monitoring mechanisms, can also help enhance the overall security posture of the Android operating system.

Patching and Updates

Google has released patches and updates to address the CVE-2023-21254 vulnerability. Users are encouraged to apply these updates as soon as possible to mitigate the risk of local privilege escalation and protect their devices from potential security threats.