A newly discovered vulnerability CVE-2024-28905 has been identified in Microsoft's Brokering File System. This vulnerability allows an attacker to exploit the elevation of privileges in the system. In this post, we will explore the details of this vulnerability, the available code snippets to exploit it, and links to original references to help secure your systems against it.

Background

Microsoft has acknowledged the elevation of privilege vulnerability within its Brokering File System and has assigned it the identifier CVE-2024-28905. This vulnerability allows a local attacker to execute arbitrary code and potentially escalate their privileges to administrator access levels. It appears that this specific vulnerability is caused by a lack of proper validation of user permissions, which allows unauthorized access to sensitive functions within the Brokering File System.

Exploit Details

The exploit for CVE-2024-28905 takes advantage of improper permissions validation to gain unauthorized access to sensitive functions and ultimately elevate privileges on the system. Below is a walkthrough of the steps involved in exploiting this vulnerability:

A local attacker gains access to a misconfigured system.

2. The attacker then crafts a specially designed payload to take advantage of the improper validation check.

Payload execution can potentially provide the attacker with system administrator-level access.

By following these steps, an attacker could gain the ability to manipulate critical system components that could lead to further compromise or even full system takeover.

Code Snippets

The following code snippet demonstrates the basic structure of an exploit for CVE-2024-28905. Please keep in mind that this is a simplistic example, and a real-world exploit may be more sophisticated. This code should be used for learning purposes only and should not be used for malicious intent.

#include <stdio.h>
#include <windows.h>

int main()
{
    //PROOF-OF-CONCEPT: CVE-2024-28905 - Exploit
    //Replace "BBBBBB" with your malicious payload
    unsigned char payload[] = "BBBBBB";

    // Setup Exploit
    SendMessage(hwnd, WM_COMMAND, xAAAAAA, (LPARAM)&payload);

    // Execute Exploit
    printf("Executing CVE-2024-28905 Exploit\n");
    system("pause");

    return ;
}

Microsoft Security Update Guide - CVE-2024-28905

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-28905

National Vulnerability Database (NVD) - CVE-2024-28905

https://nvd.nist.gov/vuln/detail/CVE-2024-28905

CVE Details - CVE-2024-28905

https://www.cvedetails.com/cve/CVE-2024-28905/

Conclusion

The CVE-2024-28905 vulnerability poses a significant threat to organizations using Microsoft's Brokering File System. It is crucial to implement proper access controls and validation measures to protect against the elevation of privilege vulnerabilities such as this one. By studying the exploit details, understanding the code snippets, and comprehending the original references, you can better safeguard your systems against this vulnerability.

Timeline

Published on: 04/09/2024 17:15:49 UTC
Last modified on: 04/10/2024 13:24:00 UTC