CVE-2023-28866 Explained : Impact and Mitigation

This article provides detailed information about CVE-2023-28866, a vulnerability identified in the Linux kernel that could potentially impact systems using specific versions.

Understanding CVE-2023-28866

CVE-2023-28866 is a vulnerability found in the Linux kernel up to version 6.2.8, specifically in the

net/bluetooth/hci_sync.c

file. The issue arises due to out-of-bounds access caused by

amp_init1[]

and

amp_init2[]

, which were intended to contain an intentionally invalid element but fail to do so.

What is CVE-2023-28866?

The vulnerability in the Linux kernel allows for unauthorized out-of-bounds access due to the misconfiguration of arrays

amp_init1[]

and

amp_init2[]

in the

hci_sync.c

file. This could potentially be exploited by attackers to gain unauthorized access or disrupt systems.

The Impact of CVE-2023-28866

If exploited, CVE-2023-28866 could lead to security breaches, unauthorized access to sensitive information, system crashes, or even potential remote code execution. It poses a significant risk to systems relying on the affected versions of the Linux kernel.

Technical Details of CVE-2023-28866

The following section delves into the technical aspects of the CVE-2023-28866 vulnerability, including its description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in the Linux kernel (up to version 6.2.8) allows for out-of-bounds access due to the incorrect setup of

amp_init1[]

and

amp_init2[]

arrays in the

net/bluetooth/hci_sync.c

file. This oversight could potentially be exploited by malicious actors.

Affected Systems and Versions

The CVE-2023-28866 vulnerability impacts systems running Linux kernel versions up to 6.2.8. While the specific vendor and product are marked as "n/a," it is crucial for organizations using Linux systems to assess their environment for potential exposure.

Exploitation Mechanism

Attackers could exploit CVE-2023-28866 by leveraging the out-of-bounds access in the

hci_sync.c

file to manipulate memory and potentially execute arbitrary code, gain unauthorized access, or disrupt system operations.

Mitigation and Prevention

To address CVE-2023-28866 and enhance overall system security, immediate steps should be taken to mitigate the risk, establish long-term security practices, and ensure systems are regularly updated with relevant patches.

Immediate Steps to Take

Organizations should assess their systems to determine if they are running the affected versions of the Linux kernel.
Apply patches or updates provided by the Linux kernel maintainers to address the vulnerability and enhance system security.
Monitor system logs and network traffic for any signs of unauthorized access or malicious activity.

Long-Term Security Practices

Implement regular security assessments and penetration testing to identify and mitigate vulnerabilities proactively.
Enforce the principle of least privilege, restricting access based on job roles and responsibilities.
Educate employees on cybersecurity best practices to minimize the risk of falling victim to social engineering attacks.

Patching and Updates

Stay informed about security advisories and updates released by the Linux kernel maintainers. Promptly apply patches to ensure systems are protected against known vulnerabilities such as CVE-2023-28866. Regularly updating systems is a key component of maintaining a secure IT environment.