CVE-2023-25937 : Vulnerability Insights and Analysis

This CVE-2023-25937 was published on June 23, 2023, by Dell. It involves an improper input validation vulnerability in Dell BIOS that could be exploited by a local authenticated malicious user with administrator privileges to modify a UEFI variable.

Understanding CVE-2023-25937

This section provides information about what CVE-2023-25937 is and its impact, along with technical details, affected systems, and mitigation strategies.

What is CVE-2023-25937?

CVE-2023-25937 refers to an improper input validation vulnerability found in Dell BIOS. This vulnerability allows a local authenticated malicious user with administrator privileges to exploit the system by modifying a UEFI variable.

The Impact of CVE-2023-25937

The impact of this vulnerability is considered medium severity with a CVSS v3.1 base score of 5.1. It has a high integrity impact, requiring high privileges to exploit. The attack complexity is low, and the attack vector is local.

Technical Details of CVE-2023-25937

This section delves into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in Dell BIOS is due to improper input validation. This flaw can be leveraged by a local authenticated malicious user with administrator privileges to potentially modify a UEFI variable, compromising the system's integrity.

Affected Systems and Versions

The affected product is Dell's CPG BIOS, with all versions being vulnerable to this exploit.

Exploitation Mechanism

To exploit CVE-2023-25937, a local authenticated malicious user needs administrator privileges to manipulate a UEFI variable, gaining unauthorized access to system settings.

Mitigation and Prevention

In this section, we discuss the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Immediately apply the security update provided by Dell to address this vulnerability. Ensure that privileged users are vigilant and monitor any unauthorized changes to the UEFI variables.

Long-Term Security Practices

Implement strict access controls and user permissions to limit the ability of local users to exploit system vulnerabilities. Regular security audits and employee training can help prevent similar issues in the future.

Patching and Updates

Stay informed about security updates and patches released by Dell for BIOS vulnerabilities. Timely installation of updates is crucial in safeguarding systems against potential threats arising from improper input validation vulnerabilities like CVE-2023-25937.