CVE-2023-28033 : Security Advisory and Response

This CVE-2023-28033 pertains to an improper input validation vulnerability found in Dell BIOS. A local authenticated malicious user with administrator privileges may potentially exploit this vulnerability to modify a UEFI variable.

Understanding CVE-2023-28033

This section will delve into the details of CVE-2023-28033, outlining what it is and its potential impact.

What is CVE-2023-28033?

The vulnerability identified in CVE-2023-28033 involves an improper input validation issue within the Dell BIOS. Specifically, it allows a local authenticated malicious user with administrator privileges to exploit the vulnerability to modify a UEFI variable. This could lead to unauthorized changes that could compromise system integrity.

The Impact of CVE-2023-28033

The impact of this vulnerability is rated as medium severity with a CVSS v3.1 base score of 5.1. While the attack complexity is low and the attack vector is local, the integrity impact is high as it could result in unauthorized modifications to UEFI variables by privileged users.

Technical Details of CVE-2023-28033

In this section, we will discuss the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in Dell BIOS is related to improper input validation, allowing local authenticated malicious users to manipulate UEFI variables.

Affected Systems and Versions

The affected product is CPG BIOS by Dell, and all versions of this BIOS are vulnerable to this improper input validation issue.

Exploitation Mechanism

The exploitation of this vulnerability requires a local authenticated malicious user with administrator privileges to make unauthorized modifications to UEFI variables.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2023-28033, certain measures can be taken to enhance overall system security.

Immediate Steps to Take

It is recommended to apply security updates provided by Dell to mitigate the vulnerability in the BIOS. Additionally, monitoring administrator access and restricting unnecessary privileges can help prevent unauthorized modifications.

Long-Term Security Practices

In the long term, it's essential to maintain regular security assessments, implement least privilege access controls, and stay informed about potential vulnerabilities in BIOS and other system components.

Patching and Updates

Dell has released a security update addressing this vulnerability. Users are advised to promptly apply the necessary patches to ensure their systems are protected from potential exploitation of this input validation issue.