CVE-2023-28040 : What You Need to Know

This CVE record pertains to a vulnerability in Dell BIOS that allows a local authenticated malicious user with administrator privileges to potentially exploit the system to modify a UEFI variable.

Understanding CVE-2023-28040

In this section, we will delve into the specifics of CVE-2023-28040, including its impact, technical details, affected systems, and mitigation strategies.

What is CVE-2023-28040?

The CVE-2023-28040 vulnerability involves an improper input validation issue within Dell BIOS. This flaw could be exploited by a local authenticated malicious user with administrator privileges to manipulate a UEFI variable.

The Impact of CVE-2023-28040

The impact of this vulnerability is rated as medium severity. While the confidentiality impact is deemed none, the integrity impact is high. It requires high privileges to exploit with a local attack vector, potentially resulting in unauthorized modification of UEFI variables.

Technical Details of CVE-2023-28040

Let's explore the technical details of CVE-2023-28040, including its vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Dell BIOS arises from improper input validation, allowing a local authenticated malicious user with elevated privileges to manipulate UEFI variables.

Affected Systems and Versions

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

Exploitation Mechanism

The exploitation of CVE-2023-28040 requires a local authenticated malicious user with administrator privileges to take advantage of the improper input validation vulnerability within Dell BIOS.

Mitigation and Prevention

In this section, we will discuss the steps that can be taken to mitigate the risks associated with CVE-2023-28040 and prevent potential exploitation.

Immediate Steps to Take

Dell advises users to apply the security update provided in Dell Client BIOS Security Advisory DSA-2023-099 to remediate the improper input validation vulnerability in Dell BIOS.

Long-Term Security Practices

It is recommended to regularly update BIOS versions and firmware to ensure that systems are protected against known vulnerabilities and security flaws.

Patching and Updates

Stay informed about security advisories from Dell and promptly apply any recommended updates to safeguard systems against vulnerabilities like CVE-2023-28040.