CVE-2022-34403 : Security Advisory and Response

A Stack-based buffer overflow vulnerability has been identified in Dell BIOS, potentially allowing a local attacker to execute arbitrary code. Read on to understand the impact, technical details, and mitigation strategies for CVE-2022-34403.

Understanding CVE-2022-34403

This section delves into the details of the vulnerability.

What is CVE-2022-34403?

Dell BIOS is susceptible to a Stack-based buffer overflow vulnerability, which can be exploited by a local authenticated attacker using an SMI to execute arbitrary code in SMRAM.

The Impact of CVE-2022-34403

The vulnerability poses a high risk, with a CVSS base score of 7.5 (High severity) due to its potential for arbitrary code execution, confidentiality, integrity, and availability impact.

Technical Details of CVE-2022-34403

Explore the technical aspects of the vulnerability in this section.

Vulnerability Description

The Stack-based buffer overflow flaw in Dell BIOS allows attackers to send oversized input to a parameter via an SMI, leading to arbitrary code execution in SMRAM.

Affected Systems and Versions

Only Dell CPG BIOS versions up to and including 2.15.2 are affected by this vulnerability.

Exploitation Mechanism

Local authenticated attackers can exploit this vulnerability by leveraging an SMI to deliver malicious input beyond the parameter limits.

Mitigation and Prevention

Discover the steps to mitigate and prevent exploitation of CVE-2022-34403.

Immediate Steps to Take

Vulnerable systems should apply security patches and updates from Dell promptly to remediate the vulnerability.

Long-Term Security Practices

Implementing strong access controls and monitoring tools can enhance the overall security posture.

Patching and Updates

Regularly update BIOS versions to the latest releases provided by Dell to protect against known vulnerabilities.