CVE-2022-26863 : Security Advisory and Response

A BIOS Input Validation vulnerability was discovered in certain versions of Dell's CPG BIOS. This vulnerability could be exploited by a locally authenticated malicious user, potentially leading to security control bypass in SMM.

Understanding CVE-2022-26863

This section delves into the specifics of the CVE-2022-26863 vulnerability.

What is CVE-2022-26863?

Prior versions of Dell BIOS contain an Input Validation vulnerability, allowing a malicious user to bypass security controls in System Management Mode (SMM).

The Impact of CVE-2022-26863

The vulnerability poses a medium-severity risk, with high impacts on confidentiality and integrity. An attacker with high privileges could exploit this vulnerability locally.

Technical Details of CVE-2022-26863

Explore the technical aspects of the CVE-2022-26863 vulnerability.

Vulnerability Description

The vulnerability lies in the BIOS Input Validation, enabling a locally authenticated attacker to send malicious input to a System Management Interrupt (SMI) to bypass security controls in SMM.

Affected Systems and Versions

Dell's CPG BIOS versions prior to 1.5.0 are affected by this vulnerability, with a custom version type left unspecified.

Exploitation Mechanism

A locally authenticated malicious user can send crafted input to an SMI to exploit the Input Validation vulnerability and compromise security controls.

Mitigation and Prevention

Discover the steps to mitigate the risks associated with CVE-2022-26863.

Immediate Steps to Take

Users should update their Dell BIOS to version 1.5.0 or newer to patch the Input Validation vulnerability and secure their systems.

Long-Term Security Practices

Regularly monitor Dell's security advisories and apply patches promptly to prevent exploitation of known vulnerabilities.

Patching and Updates

Stay informed about BIOS updates from Dell and implement a robust patch management strategy to address security vulnerabilities effectively.