CVE-2022-26864 : Exploit Details and Defense Strategies

Dell BIOS versions prior to 1.5.0 are impacted by an Input Validation vulnerability. This vulnerability could be exploited by a locally authenticated malicious user to bypass security controls.

Understanding CVE-2022-26864

This section provides insights into the impact and technical details of the CVE.

What is CVE-2022-26864?

The CVE-2022-26864 pertains to an Input Validation vulnerability in Dell BIOS versions less than 1.5.0. It allows a locally authenticated attacker to bypass security controls by sending malicious input to a System Management Interrupt (SMI).

The Impact of CVE-2022-26864

With a CVSS base score of 6.3, this vulnerability poses a medium severity risk. It has a high impact on both confidentiality and integrity while requiring high privileges for exploitation. The attack vector is local with low complexity and availability impact.

Technical Details of CVE-2022-26864

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability stems from improper input validation in Dell BIOS prior to version 1.5.0. This flaw enables a malicious user to manipulate SMI inputs and bypass SMM security controls.

Affected Systems and Versions

The affected product is CPG BIOS by Dell with versions less than 1.5.0. Users with these versions should be cautious about the security implications.

Exploitation Mechanism

To exploit CVE-2022-26864, a locally authenticated attacker can send specially crafted input to an SMI, leveraging the lack of proper input validation to achieve unauthorized operations.

Mitigation and Prevention

This section outlines actionable steps to mitigate the risks posed by CVE-2022-26864.

Immediate Steps to Take

Users are advised to update their Dell BIOS to version 1.5.0 or above to patch the vulnerability. Additionally, restrict system access to trusted entities to reduce the risk of unauthorized exploitation.

Long-Term Security Practices

Implement regular security updates and patches for BIOS systems to stay protected against emerging vulnerabilities. Conduct security audits to identify and mitigate potential risks proactively.

Patching and Updates

Stay informed about security advisories from Dell and promptly apply recommended patches to ensure the integrity and confidentiality of your system.