CVE-2023-21073 : Security Advisory and Response

This CVE record outlines a vulnerability identified as CVE-2023-21073, which was published on March 24, 2023, by the assigner organization Google Android.

Understanding CVE-2023-21073

The CVE-2023-21073 vulnerability involves a potential out-of-bounds write in the rtt_unpack_xtlv_cbfn of dhd_rtt.c, which could result in a buffer overflow. This vulnerability has the potential to enable local escalation of privilege, requiring System execution privileges without the need for user interaction.

What is CVE-2023-21073?

CVE-2023-21073 is a security vulnerability found in the Android system, specifically within the Android kernel. The vulnerability's nature allows for an out-of-bounds write that could lead to a buffer overflow, potentially enabling an attacker to escalate privilege locally.

The Impact of CVE-2023-21073

The impact of CVE-2023-21073 is significant as it could be leveraged by threat actors to escalate privileges on affected systems without requiring user interaction. This vulnerability poses a risk to the security and integrity of the Android operating system.

Technical Details of CVE-2023-21073

This section delves into the technical aspects of CVE-2023-21073, providing insights into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in question lies within the rtt_unpack_xtlv_cbfn of dhd_rtt.c, where an out-of-bounds write occurs, leading to a buffer overflow. This flaw could be exploited by malicious entities to potentially execute arbitrary code or carry out privilege escalation attacks.

Affected Systems and Versions

The vulnerability impacts the Android system, specifically the Android kernel. Systems running on affected versions of the Android kernel are at risk of exploitation through CVE-2023-21073.

Exploitation Mechanism

The exploitation of CVE-2023-21073 involves triggering the out-of-bounds write within the dhd_rtt.c component of the Android kernel. By crafting a malicious payload, threat actors may achieve local privilege escalation, further compromising the security of the system.

Mitigation and Prevention

Addressing CVE-2023-21073 requires immediate action to secure affected systems and prevent potential exploitation. Here are some recommended steps to mitigate the risks associated with this vulnerability:

Immediate Steps to Take

Apply security patches and updates provided by the Android platform to address the vulnerability promptly.
Monitor for any suspicious activities or unauthorized access attempts on vulnerable systems.
Implement restrictions and access controls to limit the impact of potential privilege escalation attempts.

Long-Term Security Practices

Regularly update and patch software to ensure the latest security fixes are in place.
Conduct security audits and vulnerability assessments to identify and address potential weaknesses within the system.
Educate users and system administrators on best practices for maintaining a secure computing environment.

Patching and Updates

Stay informed about security advisories and bulletins released by the Android platform to apply necessary patches and updates promptly. Regularly checking for security updates can help safeguard against known vulnerabilities like CVE-2023-21073 and enhance the overall security posture of the system.