CVE-2023-21075 : What You Need to Know

This CVE record was published on March 24, 2023, by Google Android. The vulnerability involves an out-of-bounds write in the 'get_svc_hash' function of 'nan.cpp', leading to a heap buffer overflow. This vulnerability could potentially allow for local escalation of privilege, requiring System execution privileges without the need for user interaction. The affected product is Android, specifically the Android kernel.

Understanding CVE-2023-21075

This section will delve deeper into the nature of CVE-2023-21075 and its implications.

What is CVE-2023-21075?

CVE-2023-21075 is characterized by an out-of-bounds write vulnerability in the 'get_svc_hash' function of 'nan.cpp' within the Android operating system. This security flaw can be exploited to trigger a heap buffer overflow, potentially leading to a scenario where an attacker could escalate their privileges locally.

The Impact of CVE-2023-21075

The impact of CVE-2023-21075 is significant as it could allow an attacker to carry out a local privilege escalation attack without requiring any user interaction. By exploiting this vulnerability, an attacker may gain elevated System execution privileges, posing a serious risk to the affected system.

Technical Details of CVE-2023-21075

In this section, we will explore the technical aspects related to CVE-2023-21075, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in 'get_svc_hash' of 'nan.cpp' results in an out-of-bounds write, leading to a heap buffer overflow. This flaw may be exploited by an attacker to potentially escalate their privileges locally.

Affected Systems and Versions

The primary affected system is Android, specifically the Android kernel. The versions impacted by this vulnerability include the Android kernel.

Exploitation Mechanism

The exploitation of CVE-2023-21075 involves triggering the out-of-bounds write in the 'get_svc_hash' function of 'nan.cpp' to cause a heap buffer overflow. This could potentially allow an attacker to escalate their privileges locally without the need for user interaction.

Mitigation and Prevention

To address CVE-2023-21075 and mitigate its potential risks, specific steps need to be taken to enhance the security posture of affected systems.

Immediate Steps to Take

It is crucial to apply security patches or updates provided by the vendor promptly to address the vulnerability. Additionally, implementing security best practices and access controls can help reduce the risk of exploitation.

Long-Term Security Practices

Establishing robust security protocols, conducting regular security assessments, and staying informed about security updates and patches are essential long-term practices to enhance the overall security resilience of the system.

Patching and Updates

Regularly monitoring for security advisories and promptly applying patches released by the vendor can help ensure that the system remains protected against known vulnerabilities like CVE-2023-21075. Additionally, maintaining up-to-date security configurations and conducting security audits are recommended practices for ongoing protection.