CVE-2023-21402 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2023-21402 related to an elevation of privilege vulnerability in Google's Android operating system.

Understanding CVE-2023-21402

This section will cover the essential aspects of CVE-2023-21402, including its nature and impact.

What is CVE-2023-21402?

CVE-2023-21402 is an elevation of privilege vulnerability found in Google's Android operating system. Specifically, the vulnerability exists in MMU_UnmapPages of mmu_common.c. Attackers can exploit this vulnerability due to improper input validation, leading to a potential out of bounds read. The exploit could allow for local escalation of privilege within the kernel without requiring additional execution privileges. Notably, user interaction is not necessary for malicious exploitation.

The Impact of CVE-2023-21402

The impact of CVE-2023-21402 is significant as threat actors could capitalize on this vulnerability to escalate privileges locally within the Android operating system. With the potential for unauthorized escalation, attackers could gain elevated access levels and compromise system integrity.

Technical Details of CVE-2023-21402

This section will delve into the technical specifics of CVE-2023-21402, including vulnerability description, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability in MMU_UnmapPages of mmu_common.c allows for an out of bounds read due to inadequate input validation. This flaw enables attackers to escalate privileges locally within the kernel.

Affected Systems and Versions

Google's Android operating system is affected by CVE-2023-21402, specifically impacting devices utilizing the "Android SoC" version.

Exploitation Mechanism

The exploitation of CVE-2023-21402 does not require user interaction, making it a potentially attractive target for threat actors. By manipulating the vulnerability present in MMU_UnmapPages, attackers can achieve local privilege escalation within the Android kernel.

Mitigation and Prevention

This section outlines proactive measures to mitigate the risks associated with CVE-2023-21402 and prevent potential exploitation.

Immediate Steps to Take

To address CVE-2023-21402, users and administrators should prioritize implementing vendor-provided patches promptly. Timely application of security updates is crucial in reducing the exposure to this elevation of privilege vulnerability.

Long-Term Security Practices

In addition to applying patches, maintaining good security practices such as regular system updates, threat monitoring, and access control mechanisms can enhance overall cybersecurity posture and mitigate the impact of similar vulnerabilities in the future.

Patching and Updates

Google has likely released security updates addressing CVE-2023-21402. Users are advised to check the official security bulletin from Google to obtain and apply the necessary patches to secure their devices against this elevation of privilege vulnerability.