CVE-2023-21078 : Security Advisory and Response

This CVE-2023-21078 relates to a vulnerability found in the Android operating system that could potentially lead to local escalation of privilege with System execution privileges required. The vulnerability specifically exists in the rtt_unpack_xtlv_cbfn function of dhd_rtt.c, resulting in a possible out-of-bounds write due to a buffer overflow. Notably, user interaction is not necessary for exploitation.

Understanding CVE-2023-21078

This section delves into the details of CVE-2023-21078, highlighting its impact and technical specifics.

What is CVE-2023-21078?

The CVE-2023-21078 vulnerability is situated in the Android operating system, specifically within the rtt_unpack_xtlv_cbfn function of dhd_rtt.c. It opens up the potential for a buffer overflow, leading to an out-of-bounds write. The exploit could enable an attacker to achieve local escalation of privilege, requiring System execution privileges.

The Impact of CVE-2023-21078

The impact of this vulnerability is significant as it could potentially allow an attacker to elevate their privileges locally on the affected Android systems. This could result in unauthorized actions being performed with elevated permissions, posing a serious security risk.

Technical Details of CVE-2023-21078

Understanding the technical aspects of CVE-2023-21078 is crucial in effectively addressing and mitigating the vulnerability.

Vulnerability Description

The vulnerability stems from a buffer overflow in the rtt_unpack_xtlv_cbfn function of dhd_rtt.c, leading to an out-of-bounds write. This flaw could be exploited by an attacker to gain local escalation of privilege without requiring user interaction.

Affected Systems and Versions

The vulnerability impacts Android systems with the affected component being the Android kernel. Specifically, the issue affects the Android kernel version, leading to the potential exploitation of the buffer overflow.

Exploitation Mechanism

The exploitation of CVE-2023-21078 involves leveraging the buffer overflow in the rtt_unpack_xtlv_cbfn function of dhd_rtt.c within the Android kernel. By manipulating this vulnerability, an attacker may achieve local escalation of privilege on the targeted system.

Mitigation and Prevention

Taking proactive measures to mitigate and prevent the exploitation of CVE-2023-21078 is crucial for maintaining the security of Android devices.

Immediate Steps to Take

Immediate steps include keeping systems updated with the latest security patches and fixes. Additionally, monitoring system activity for any signs of unauthorized privilege escalation is essential.

Long-Term Security Practices

Establishing robust security protocols, such as implementing least privilege access, network segmentation, and regular security audits, can help fortify the system against potential vulnerabilities like CVE-2023-21078.

Patching and Updates

It is recommended to apply security patches and updates released by Android to address the CVE-2023-21078 vulnerability. Regularly updating the Android kernel and system components helps to mitigate the risk of exploitation and enhances overall system security.