CVE-2023-21195 : What You Need to Know

This CVE record details a vulnerability in Android that could potentially lead to local information disclosure over Bluetooth. The vulnerability requires system execution privileges for exploitation and involves an out-of-bounds read due to an incorrect bounds check.

Understanding CVE-2023-21195

This section will delve into what CVE-2023-21195 entails and its implications.

What is CVE-2023-21195?

CVE-2023-21195, identified in the btm_ble_periodic_adv_sync_tx_rcvd function of btm_ble_gap.cc, is a vulnerability in Android that could result in local information disclosure over Bluetooth. The issue arises from an incorrect bounds check, potentially allowing unauthorized access to sensitive data.

The Impact of CVE-2023-21195

The impact of this vulnerability is significant as it could lead to the exposure of sensitive information over Bluetooth connections. Attackers exploiting this vulnerability could access data that should remain confidential, posing a risk to user privacy and security.

Technical Details of CVE-2023-21195

In this section, we will explore the technical aspects of CVE-2023-21195, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in btm_ble_periodic_adv_sync_tx_rcvd function of btm_ble_gap.cc results from an incorrect bounds check, leading to an out-of-bounds read. This flaw could be exploited to disclose local information over Bluetooth connections, particularly if the firmware is compromised with system execution privileges.

Affected Systems and Versions

The affected product is Android, specifically version Android-13. Systems running Android-13 are vulnerable to this information disclosure issue over Bluetooth connections.

Exploitation Mechanism

To exploit CVE-2023-21195, attackers would need to leverage the vulnerability in the btm_ble_periodic_adv_sync_tx_rcvd function, allowing them to perform an out-of-bounds read and potentially access sensitive data over Bluetooth. System execution privileges are required for successful exploitation, and user interaction is not necessary.

Mitigation and Prevention

In this section, we will outline the steps to mitigate and prevent the exploitation of CVE-2023-21195.

Immediate Steps to Take

Users and organizations are advised to ensure their Android devices are updated to the latest security patches and firmware versions. Additionally, limiting Bluetooth connections to trusted devices can help reduce the risk of unauthorized access to sensitive information.

Long-Term Security Practices

Maintaining regular security updates, staying informed about potential vulnerabilities, and adopting best security practices can enhance overall defense against information disclosure vulnerabilities like CVE-2023-21195.

Patching and Updates

It is crucial for Android users to regularly check for and apply security updates provided by Google to address vulnerabilities like CVE-2023-21195. Timely patching of affected systems is essential to mitigate the risk of exploitation and protect sensitive data from unauthorized access.