CVE-2021-36283 : Security Advisory and Response

A vulnerability has been discovered in Dell BIOS that could allow a local authenticated malicious user to execute arbitrary code in SMRAM using an SMI. Learn more about the impact, technical details, and mitigation strategies below.

Understanding CVE-2021-36283

This section provides insights into the nature of the vulnerability and its implications.

What is CVE-2021-36283?

The CVE-2021-36283 vulnerability involves improper input validation in Dell BIOS, enabling a local authenticated attacker to potentially execute arbitrary code via an SMI.

The Impact of CVE-2021-36283

The vulnerability's CVSS v3.1 base score is 7.5, indicating a high severity threat with significant impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-36283

Explore the specific technical aspects of the CVE-2021-36283 vulnerability in this section.

Vulnerability Description

Dell BIOS contains an improper input validation flaw that could be exploited by a local authenticated user to achieve arbitrary code execution in SMRAM.

Affected Systems and Versions

The vulnerability affects Dell CPG BIOS versions prior to 1.3.1.

Exploitation Mechanism

A local authenticated malicious user can leverage an SMI to exploit the vulnerability and gain arbitrary code execution in SMRAM.

Mitigation and Prevention

Discover the steps to mitigate and prevent exploitation of CVE-2021-36283 in this section.

Immediate Steps to Take

Users are advised to update their Dell CPG BIOS to version 1.3.1 or later to mitigate the vulnerability.

Long-Term Security Practices

Implement comprehensive security measures, including regular BIOS updates, to enhance system protection and prevent similar vulnerabilities.

Patching and Updates

Stay informed about security patches and updates released by Dell to address vulnerabilities and enhance system security.