CVE-2024-29994 - Microsoft Windows SCSI Class System File Elevation of Privilege Vulnerability Explained: Exploit Details, Code Snippets, and Original References

CVE-2024-29994 refers to an elevation of privilege vulnerability that exists in the Microsoft Windows SCSI (Small Computer System Interface) class system file. In this blog post, we will dive into the details of this vulnerability, explore code snippets, and provide links to the original references. Understanding the implications and risks of this vulnerability is crucial for both developers and system administrators, as it could potentially allow attackers to escalate their privileges and execute malicious actions on a victim's system.

Exploit Details

Elevation of privilege (EoP) vulnerabilities occur when an attacker can gain unauthorized access to elevated privileges on a system without proper permission checks. In the context of Microsoft Windows, privilege levels range from user-level permissions (the lowest level) up to system-level permissions (the highest level). The vulnerability in the SCSI class system file allows an attacker with user-level permissions to potentially achieve system-level permissions. This is a high-risk vulnerability as system-level permissions can grant full control over the entire system.

The issue in the SCSI class system file is caused by a lack of proper validation and insecure handling of user-supplied input. When an attacker crafts a malicious input payload and sends it to the affected system file, they can potentially trigger the elevation of privilege vulnerability. If successful, the attacker can then exploit this vulnerability to execute code with system-level permissions, which can lead to a wide range of attacks such as data theft, system manipulation, and malware installation.

Code Snippet

Below is a simplified example of how the malicious input payload could be crafted to exploit the vulnerability:

#include <Windows.h>

int main() {
  // Create a malicious input payload that exploits the vulnerability
  char malicious_payload[] = "INSERT_MALICIOUS_PAYLOAD_HERE";
  
  // Open the target SCSI device (assumes the attacker has access)
  HANDLE hDevice = CreateFile("\\\\.\\TargetSCSI", GENERIC_READ | GENERIC_WRITE, , NULL, OPEN_EXISTING, , NULL);

  // Write the malicious payload to the target device
  DWORD bytes_written;
  WriteFile(hDevice, malicious_payload, sizeof(malicious_payload), &bytes_written, NULL);

  // Close the handle and execute the payload through the vulnerable SCSI class system file
  CloseHandle(hDevice);
  // Trigger the exploit by malicious crafted input
}

This code snippet demonstrates how an attacker could craft a malicious payload and send it to the target SCSI device, which would then be processed by the vulnerable SCSI class system file.

For more information on CVE-2024-29994, refer to the following original references

1. CVE-2024-29994: Microsoft Windows SCSI Class System File Elevation of Privilege Vulnerability - Security Advisory
2. Microsoft Security Response Center - MSRC Bulletin
3. NVD - National Vulnerability Database Entry for CVE-2024-29994

Conclusion

CVE-2024-29994 is a high-risk elevation of privilege vulnerability that can grant an attacker full control over a victim's system. Developers and system administrators should be aware of this vulnerability and apply the necessary patches or security measures to mitigate its potential impact. By understanding the risks, exploit details, and code snippets related to this vulnerability, we can take a proactive approach to ensuring the security and privacy of our systems.

Timeline

Published on: 05/14/2024 17:16:17 UTC
Last modified on: 08/02/2024 01:25:00 UTC