CVE-2023-21151 Explained : Impact and Mitigation

This article provides insights into CVE-2023-21151, including its description, impact, technical details, and mitigation strategies.

Understanding CVE-2023-21151

CVE-2023-21151 is a vulnerability identified in the Google BMS kernel module, potentially leading to an out-of-bounds write due to a heap buffer overflow. This vulnerability could result in local escalation of privilege, requiring System execution privileges without the need for user interaction.

What is CVE-2023-21151?

The CVE-2023-21151 vulnerability exists in the Google BMS kernel module, allowing for an out-of-bounds write due to a heap buffer overflow. This flaw could be exploited by attackers to achieve local escalation of privilege on affected systems.

The Impact of CVE-2023-21151

The impact of CVE-2023-21151 is significant as it could enable malicious actors to elevate their privileges on the target system, potentially leading to unauthorized access and control.

Technical Details of CVE-2023-21151

This section delves into the technical aspects of CVE-2023-21151, including vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

CVE-2023-21151 is characterized by a heap buffer overflow in the Google BMS kernel module, allowing for an out-of-bounds write operation. This weakness opens up avenues for attackers to manipulate memory beyond the allocated buffer, leading to privilege escalation.

Affected Systems and Versions

The vulnerability impacts the Android operating system specifically in the Android kernel version. Systems running on the affected Android kernel version are at risk of exploitation through CVE-2023-21151.

Exploitation Mechanism

Exploiting CVE-2023-21151 involves triggering the heap buffer overflow within the Google BMS kernel module, potentially enabling attackers to execute malicious code and elevate their privileges on the target system.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-21151, it is essential to implement immediate steps, adhere to long-term security practices, and apply necessary patches and updates.

Immediate Steps to Take

Disable unnecessary services and reduce the attack surface.
Monitor system activity for any suspicious behavior or unauthorized access attempts.
Apply available security updates provided by the vendor to address the vulnerability.

Long-Term Security Practices

Implement strong access controls and least privilege principles.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users on security best practices to enhance awareness and prevent social engineering attacks.

Patching and Updates

Stay informed about security bulletins and advisories released by the vendor, such as the Android Security Bulletin, and promptly apply patches and updates to mitigate known vulnerabilities like CVE-2023-21151.