CVE-2023-25938 : Security Advisory and Response

This CVE-2023-25938 record was published by Dell on June 23, 2023. It pertains to an improper input validation vulnerability found in Dell BIOS, which could potentially be exploited by a local authenticated malicious user with administrator privileges to modify a UEFI variable.

Understanding CVE-2023-25938

This section delves into the details of the CVE-2023-25938 vulnerability.

What is CVE-2023-25938?

The CVE-2023-25938 vulnerability involves an improper input validation issue within Dell BIOS. This vulnerability could be abused by a local authenticated malicious user who possesses administrator privileges to manipulate a UEFI variable.

The Impact of CVE-2023-25938

The impact of this vulnerability is notable as it poses a medium severity risk, with a CVSS base score of 5.1. The integrity impact is high, potentially allowing unauthorized users to make modifications to UEFI variables.

Technical Details of CVE-2023-25938

In this section, the technical aspects of CVE-2023-25938 are explored.

Vulnerability Description

The vulnerability in Dell BIOS arises from improper input validation, enabling local authenticated malicious users with administrator privileges to exploit it for unauthorized modifications to UEFI variables.

Affected Systems and Versions

CPG BIOS from Dell across all versions is impacted by this vulnerability.

Exploitation Mechanism

The exploitation of this vulnerability requires a local authenticated malicious user with elevated privileges to take advantage of the improper input validation flaw in Dell BIOS.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2023-25938 is crucial for ensuring system security.

Immediate Steps to Take

Dell users should promptly refer to the vendor's advisory and apply the necessary security updates to address this vulnerability.

Long-Term Security Practices

Implement strict access controls and user permissions to limit the privileges of local users, reducing the likelihood of unauthorized exploitation.
Regularly monitor and update BIOS firmware to stay protected against potential vulnerabilities.

Patching and Updates

Stay informed about security advisories from Dell and promptly install recommended BIOS security updates to mitigate the risks associated with CVE-2023-25938.