CVE-2023-28036 Explained : Impact and Mitigation

This CVE record pertains to an improper input validation vulnerability found in Dell BIOS, potentially exploitable by a local authenticated malicious user with administrator privileges to modify a UEFI variable. The vulnerability was published on June 23, 2023.

Understanding CVE-2023-28036

This section delves into a detailed understanding of the CVE-2023-28036 vulnerability in Dell BIOS.

What is CVE-2023-28036?

CVE-2023-28036 refers to an improper input validation vulnerability present in Dell BIOS. This flaw could be exploited by a local authenticated malicious user with administrator privileges to alter a UEFI variable.

The Impact of CVE-2023-28036

The impact of this vulnerability is rated as medium severity with a CVSS base score of 5.1. It has a low attack complexity and vector, high integrity impact, and requires high privileges to execute, leading to potential unauthorized modifications in UEFI variables.

Technical Details of CVE-2023-28036

In this section, we will explore the technical aspects related to CVE-2023-28036.

Vulnerability Description

The vulnerability in Dell BIOS results from improper input validation, allowing a local authenticated attacker to manipulate UEFI variables.

Affected Systems and Versions

The affected product is CPG BIOS by Dell, with all versions being susceptible to this vulnerability.

Exploitation Mechanism

To exploit CVE-2023-28036, a local authenticated malicious user with administrator rights needs to leverage the improper input validation flaw in Dell BIOS to modify a UEFI variable.

Mitigation and Prevention

Mitigating CVE-2023-28036 requires immediate action and the establishment of long-term security practices to safeguard systems.

Immediate Steps to Take

Dell recommends applying the necessary security updates promptly to address the vulnerability in Dell BIOS.
Users are advised to restrict access to privileged accounts and monitor UEFI variable modifications closely.

Long-Term Security Practices

Implementing the principle of least privilege, conducting regular security assessments, and ensuring timely security patch management are crucial for enhancing system security.

Patching and Updates

Dell has released a security update addressing the improper input validation vulnerability in Dell BIOS. Users are urged to install the latest patches provided by Dell to mitigate the risk posed by CVE-2023-28036.