CVE-2023-21199 : Exploit Details and Defense Strategies

This CVE record pertains to a vulnerability in Android systems that could potentially lead to local information disclosure with system execution privileges required. The vulnerability was published on June 28, 2023, by Google Android.

Understanding CVE-2023-21199

This section will delve into the details of CVE-2023-21199, providing an understanding of the nature and impact of this vulnerability.

What is CVE-2023-21199?

CVE-2023-21199 specifically occurs in btu_ble_proc_ltk_req of btu_hcif.cc, where a missing bounds check can result in an out-of-bounds read. This could allow for local information disclosure, requiring system execution privileges for exploitation. Notably, user interaction is not necessary for this vulnerability to be exploited.

The Impact of CVE-2023-21199

The impact of this vulnerability is significant as it can potentially lead to local information disclosure on affected Android systems. Given that system execution privileges are required for exploitation, the risk posed by CVE-2023-21199 is notable.

Technical Details of CVE-2023-21199

In this section, we will explore the technical aspects of CVE-2023-21199, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability relates to a missing bounds check in btu_ble_proc_ltk_req of btu_hcif.cc, which can result in an out-of-bounds read. This flaw can be exploited to achieve local information disclosure on the affected Android systems.

Affected Systems and Versions

The impacted system is Android, specifically version Android-13. Systems running Android-13 are susceptible to this vulnerability, as confirmed by Google Android.

Exploitation Mechanism

Exploiting CVE-2023-21199 requires system execution privileges but does not necessitate user interaction, making it a significant concern for affected Android devices.

Mitigation and Prevention

To address CVE-2023-21199, it is crucial to take immediate steps to mitigate the risk and prevent potential exploitation. Here are some recommended actions:

Immediate Steps to Take

Implement security updates provided by Google Android promptly.
Monitor official security bulletins and announcements for patch releases.
Consider restricting system privileges to minimize the impact of potential information disclosure.

Long-Term Security Practices

Regularly update and patch Android devices to address known vulnerabilities.
Conduct regular security assessments and audits to identify and mitigate risks proactively.
Educate users on safe browsing practices and potential security threats to enhance overall system security.

Patching and Updates

It is essential to stay informed about security updates released by Google Android and promptly apply relevant patches to address CVE-2023-21199. Regularly checking for and installing updates is crucial to maintaining the security of Android devices.