CVE-2023-21194 : Exploit Details and Defense Strategies

This CVE, published on June 28, 2023, by Google Android, highlights a vulnerability in the gatt_dbg_op_name function of gatt_utils.cc, which could potentially lead to local information disclosure in the Bluetooth server of Android-13.

Understanding CVE-2023-21194

This section delves into the details of CVE-2023-21194, discussing what the vulnerability entails and its potential impact.

What is CVE-2023-21194?

The vulnerability in CVE-2023-21194 resides in the gatt_dbg_op_name function of gatt_utils.cc, where a missing bounds check could result in an out-of-bounds read. This flaw could be exploited to achieve local information disclosure in the Bluetooth server. Notably, exploitation requires system execution privileges and does not mandate user interaction.

The Impact of CVE-2023-21194

The impact of CVE-2023-21194 is centered around the potential for local information disclosure within the Bluetooth server on Android-13 devices. Given the prerequisite of system execution privileges, adversaries could exploit this vulnerability to access sensitive information without user interaction.

Technical Details of CVE-2023-21194

In this section, we delve into the technical aspects of CVE-2023-21194, exploring the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from a missing bounds check in the gatt_dbg_op_name function of gatt_utils.cc, paving the way for an out-of-bounds read that could lead to local information disclosure within the Bluetooth server.

Affected Systems and Versions

The affected system identified in CVE-2023-21194 is Android-13. Specifically, devices running Android-13 are at risk of exploitation through this vulnerability.

Exploitation Mechanism

To exploit CVE-2023-21194, attackers would require system execution privileges but do not need user interaction. By leveraging the missing bounds check in the gatt_dbg_op_name function, adversaries could potentially access confidential information within the Bluetooth server.

Mitigation and Prevention

This section outlines the necessary steps to mitigate and prevent the exploitation of CVE-2023-21194, focusing on immediate actions and long-term security practices.

Immediate Steps to Take

To address CVE-2023-21194, it is recommended to apply security patches and updates promptly. Additionally, organizations should monitor for any signs of unauthorized access or information disclosure within the Bluetooth server on Android-13 devices.

Long-Term Security Practices

In the long term, instituting robust security measures, such as regular security assessments, network segmentation, and user access controls, can bolster defenses against similar vulnerabilities. Employing encryption protocols and monitoring tools also contributes to enhancing overall system security.

Patching and Updates

Updating affected Android-13 devices with the latest security patches is essential to mitigate the risk posed by CVE-2023-21194. Staying informed about security advisories from reliable sources, such as Google Android's security bulletin, can aid in timely patch management and proactive vulnerability mitigation.