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CVE-2024-54952: Critical Memory Corruption Vulnerability in MikroTik RouterOS 6.40.5 SMB Service

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Overview

This report discusses the critical security vulnerability, CVE-2024-54952, that affects the SMB service in MikroTik RouterOS 6.40.5. This vulnerability, if exploited, can lead to a Remote Denial of Service (DoS), causing the SMB service to become unavailable, potentially leading to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2024-54952
Severity: Critical (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Remote Denial of Service (DoS), potential system compromise, and data leakage

Affected Products

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Product | Affected Versions

MikroTik RouterOS | 6.40.5

How the Exploit Works

An unauthenticated attacker can exploit this vulnerability by sending specially crafted packets to the SMB service in MikroTik RouterOS. These packets trigger a null pointer dereference, which leads to a memory corruption and subsequent DoS condition, making the SMB service unavailable.

Conceptual Example Code

The conceptual example below demonstrates how an attacker might craft a malicious packet to exploit this vulnerability:

POST /SMB/service HTTP/1.1
Host: target.mikrotik.com
Content-Type: application/x-smb
{ "malicious_packet": "NULL_POINTER_DEREFERENCE_TRIGGER" }

Upon receiving this packet, the SMB service would trigger a null pointer dereference, leading to memory corruption and a subsequent DoS condition.

Mitigation

To mitigate this vulnerability, users are advised to apply the patch provided by the vendor. As a temporary measure, users can also implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and filter incoming packets to the SMB service.

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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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