CVE-2022-26862 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2022-26862, a vulnerability found in prior versions of Dell CPG BIOS, affecting Dell systems.

Understanding CVE-2022-26862

CVE-2022-26862 is a vulnerability in Dell's CPG BIOS that allows a locally authenticated malicious user to exploit an Input Validation issue.

What is CVE-2022-26862?

Prior versions of Dell BIOS contain an Input Validation vulnerability. A malicious user could exploit this issue by sending crafted input to a System Management Interrupt (SMI) to bypass security controls.

The Impact of CVE-2022-26862

With a CVSS base score of 6.3, this vulnerability has a medium severity level. It can lead to high confidentiality and integrity impacts when exploited by a privileged local user.

Technical Details of CVE-2022-26862

This section covers specific technical details of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Dell CPG BIOS is related to improper input validation. An attacker with local access could exploit this flaw to manipulate SMI and evade security measures in SMM.

Affected Systems and Versions

Dell systems running CPG BIOS versions prior to 1.5.0 are vulnerable to CVE-2022-26862. It impacts systems that use custom BIOS builds.

Exploitation Mechanism

A locally authenticated attacker could send malicious input to an SMI to exploit the Input Validation vulnerability. By doing so, the attacker can circumvent security controls present in System Management Mode.

Mitigation and Prevention

Learn how to protect your systems from CVE-2022-26862 through immediate actions and long-term security practices.

Immediate Steps to Take

Update to the latest Dell BIOS version above 1.5.0 to mitigate the vulnerability effectively. Monitor system activities for any signs of exploitation.

Long-Term Security Practices

Implement robust access controls and regularly review security configurations to prevent unauthorized access to BIOS components.

Patching and Updates

Stay informed about security updates from Dell and apply patches promptly to address known vulnerabilities in the BIOS software.