CVE-2023-28026 Explained : Impact and Mitigation

This CVE-2023-28026 involves an improper input validation vulnerability in Dell BIOS that could potentially be exploited by a local authenticated malicious user with administrator privileges to modify a UEFI variable. The vulnerability was published on June 23, 2023, by Dell.

Understanding CVE-2023-28026

This section delves into the specifics of CVE-2023-28026 and its potential impact on affected systems.

What is CVE-2023-28026?

The CVE-2023-28026 vulnerability pertains to an improper input validation issue in Dell BIOS, allowing a local authenticated malicious user with administrative rights to exploit it to manipulate a UEFI variable within the system.

The Impact of CVE-2023-28026

With a CVSS base score of 5.1, this vulnerability is classified as "medium" severity. It has a low attack complexity and vector (LOCAL), moderate availability impact, no confidentiality impact, but high integrity impact. The privileges required are high, and user interaction is not necessary.

Technical Details of CVE-2023-28026

This section provides more technical insights into the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Dell BIOS arises from improper input validation, potentially allowing unauthorized modification of UEFI variables by exploiting a local authenticated malicious user with administrative privileges.

Affected Systems and Versions

The vulnerability affects all versions of the CPG BIOS by Dell.

Exploitation Mechanism

To exploit this vulnerability, a local authenticated malicious user would need to have administrator privileges on the affected system. By leveraging this vulnerability, the attacker can tamper with UEFI variables.

Mitigation and Prevention

Mitigating CVE-2023-28026 requires immediate action to safeguard systems and prevent potential exploitation.

Immediate Steps to Take

Users are advised to refer to the Dell vendor advisory for CVE-2023-28026 and apply the necessary security updates provided to address the improper input validation vulnerability in Dell BIOS. Additionally, restricting administrative access can enhance security posture.

Long-Term Security Practices

Maintaining regular security updates, monitoring for unauthorized changes to UEFI variables, and implementing strong access controls can help prevent similar vulnerabilities in the future.

Patching and Updates

Dell has released a security update addressing the improper input validation vulnerability in their BIOS. Users should promptly apply this patch to mitigate the risk of exploitation and enhance the security of their systems.