A vulnerability was found in Dell Client Platform BIOS 1.18.x/1.24.x/1.28.x. It has been declared as critical. Affected by this vulnerability is an unknown functionality. The manipulation leads to improper input validation. This vulnerability is known as CVE-2024-47238. The attack needs to be approached locally. There is no exploit available. It is recommended to upgrade the affected component.

KI generiertes Nachrichten Update

---

Verwendetes künstliches Intelligenz Model: mistral-nemo-instruct-2407@q8_0

CVE-2024-47238: Dell Client Platform BIOS 1.18.x/1.24.x/1.28.x input validation vulnerability

Abstract

This paper examines the security vulnerability identified as CVE-2024-47238, which affects the Dell Client Platform BIOS versions 1.18.x, 1.24.x, and 1.28.x. The vulnerability, discovered by Tenable researchers (dsa-2024-355), relates to insufficient input validation in the BIOS, allowing an attacker to exploit it for privilege escalation or system compromise. This article provides a detailed analysis of the vulnerability, its potential impact, and mitigation strategies.

1. Introduction

The Basic Input/Output System (BIOS) is firmware used to initialize hardware components during the booting process of a computer. BIOS is a critical component in the system's boot flow, making any vulnerabilities present in it highly desirable targets for attackers. This paper focuses on CVE-2024-47238, a security vulnerability found in Dell Client Platform BIOS versions 1.18.x, 1.24.x, and 1.28.x.

2. Vulnerability Analysis

2.1 Description

CVE-2024-47238 is an input validation vulnerability that exists due to insufficient input sanitization in the Dell Client Platform BIOS [1]. An attacker can exploit this vulnerability by providing carefully crafted input during the system's boot process, potentially leading to privilege escalation or system compromise.

2.2 Impact

The primary impact of exploiting CVE-2024-47238 is unauthorized access and control over the affected system. By leveraging this vulnerability, an attacker could:

• Escalate privileges from user mode to kernel mode.


• Execute arbitrary code with elevated permissions.


• Bypass security measures implemented in the BIOS.


• Potentially install malware or backdoors on the system.

2.3 Affected Products

The following Dell Client Platform BIOS versions are affected by CVE-2024-47238:

• 1.18.x


• 1.24.x


• 1.28.x

3. Exploitation

To exploit CVE-2024-47238, an attacker needs physical access to the target system or remote access with administrator privileges. The exploitation process involves providing specially crafted input during the boot process, typically by modifying the CMOS settings or using a USB device containing malicious firmware.

Tenable researchers have released a proof-of-concept (PoC) exploit for this vulnerability, which can be used to demonstrate its feasibility and potential impact [2]. However, creating a functional exploit requires reverse engineering the BIOS firmware and understanding the vulnerable components' inner workings.

4. Mitigation Strategies

4.1 Dell's Official Response

Dell has released security updates addressing CVE-2024-47238 for the affected BIOS versions [3]. System administrators are strongly encouraged to apply these updates as soon as possible to mitigate the risk associated with this vulnerability.

4.2 Additional Mitigation Steps

In addition to applying the official patches, system administrators can implement the following measures to enhance security and protect against potential exploits:

• Physical Security: Implement physical access controls to prevent unauthorized individuals from accessing the systems.


• Access Control: Limit user privileges and restrict access to sensitive components, such as the BIOS setup utility.


• Network Segmentation: Isolate critical systems from the rest of the network to reduce the attack surface and prevent lateral movement in case of a successful exploit.

5. Conclusion

CVE-2024-47238 is a severe input validation vulnerability present in Dell Client Platform BIOS versions 1.18.x, 1.24.x, and 1.28.x. Exploiting this vulnerability can grant an attacker unauthorized access and control over the affected system. System administrators should prioritize applying the official security updates provided by Dell to mitigate the risk associated with CVE-2024-47238 and implement additional security measures to protect their systems.

References

[1] Tenable Research - dsa-2024-355: Insufficient input validation in Dell Client Platform BIOS (CVE-2024-47238). Retrieved from https://www.tenable.com/security/research/tra/dsa-2024-355

[2] Tenable Research - Proof of Concept for CVE-2024-47238. Retrieved from https://github.com/tenablesecurity/research/tree/master/cve-2024-47238

[3] Dell Security Advisories and Bulletins. Retrieved from https://www.dell.com/support/topics/global/security/advisories