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CVE-2023-31035: NVIDIA DGX A100 SBIOS SMI Callout Vulnerability

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Overview

This report provides a detailed analysis of CVE-2023-31035, a significant vulnerability detected in NVIDIA’s DGX A100 SBIOS. This vulnerability exposes systems to potential compromise and data leakage, highlighting the importance of immediate action for mitigation. The implications of this vulnerability are severe, and it is critical for users of the affected NVIDIA products to understand the threat and take appropriate preventive measures.

Vulnerability Summary

CVE ID: CVE-2023-31035
Severity: High (7.5 CVSS)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise, denial of service, escalation of privileges, and data leakage.

Affected Products

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Product | Affected Versions

NVIDIA DGX A100 SBIOS | All versions prior to update

How the Exploit Works

The vulnerability lies within the NVIDIA DGX A100 SBIOS, where an attacker can trigger an SMI callout vulnerability. This vulnerability can be exploited to execute arbitrary code at the System Management Mode (SMM) level. Successfully exploiting this vulnerability could lead to system compromise, denial of service, escalation of privileges, and information disclosure.

Conceptual Example Code

The following is a conceptual code example illustrating how an attacker might exploit this vulnerability. Please note that this is a simplified example and does not represent a real exploit.

# Attacker sends a specially crafted SMI request
smi_request --callout "malicious_code"

The attacker uses a specially crafted SMI request to trigger the vulnerability and execute malicious code in the SMM.

Mitigation Guidance

Until a patch is made available by NVIDIA, users are recommended to deploy a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. Once the official patch is released, it should be applied immediately to all affected systems. Regular patching and updating of systems is a critical component of maintaining cybersecurity.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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