CVE-2023-21340 : What You Need to Know

This CVE record was published on October 30, 2023, by Google Android, with a focus on information disclosure in the Telecomm component of Android version 14. The vulnerability allows unauthorized access to call state information without proper permission checks, potentially leading to local information disclosure without requiring any additional execution privileges.

Understanding CVE-2023-21340

In this section, we will delve into what CVE-2023-21340 entails, its impact, technical details, and mitigation strategies.

What is CVE-2023-21340?

CVE-2023-21340 is a security vulnerability identified in the Telecomm component of Android version 14. It allows for the extraction of call state information due to a missing permission check, leading to potential local information disclosure.

The Impact of CVE-2023-21340

The impact of CVE-2023-21340 revolves around the unauthorized access to call state information, which could compromise user privacy and confidentiality. Attackers could exploit this vulnerability to gather sensitive data without the need for user interaction, posing a significant risk to affected systems.

Technical Details of CVE-2023-21340

Now, let's dive into the technical specifics of CVE-2023-21340, including vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in the Telecomm component of Android version 14 allows malicious actors to extract call state information without the necessary permission checks. This oversight could result in the unauthorized disclosure of sensitive data stored locally on the device.

Affected Systems and Versions

Google Android version 14 is confirmed to be affected by CVE-2023-21340. Users relying on this specific version are at risk of information disclosure through the Telecomm component.

Exploitation Mechanism

The exploitation of CVE-2023-21340 does not require any additional user privileges or interaction. Attackers can exploit this vulnerability to access call state information without the appropriate permissions, potentially exposing sensitive data.

Mitigation and Prevention

To safeguard against the risks posed by CVE-2023-21340, it is crucial to implement effective mitigation and prevention measures promptly.

Immediate Steps to Take

Users should ensure their Android devices are running on the latest security updates provided by Google.
Limit unnecessary permissions granted to applications to minimize the risk of unauthorized access to sensitive information.
Exercise caution when downloading and installing apps from untrusted sources that may exploit vulnerabilities like CVE-2023-21340.

Long-Term Security Practices

Regularly monitor security bulletins and updates released by Google to stay informed about potential vulnerabilities.
Educate users on best practices for data security and privacy protection on their Android devices.
Implement robust access control measures and security protocols to restrict unauthorized access to sensitive data.

Patching and Updates

Google has likely released a security patch or update addressing CVE-2023-21340. Users are strongly advised to promptly install the latest updates to mitigate the risks associated with this vulnerability and ensure the security of their Android devices.