In this post, we will investigate CVE-2024-49098, a critical Information Disclosure Vulnerability found in the Windows Wireless Wide Area Network Service (WwanSvc). This vulnerability was first disclosed by Microsoft on their Security Update Guide. It allows an attacker to gain access to sensitive information that could potentially be used to compromise the system further.

To truly understand the severity of this vulnerability, we will explore the following sections in detail:

Background information on WwanSvc

The Windows Wireless Wide Area Network Service (WwanSvc) is a service in the Microsoft Windows Operating System that manages mobile broadband (3G/4G) devices and connections. WwanSvc allows users to access the Internet through mobile networks, enabling laptops, tablets, and other devices to stay connected while on the go. WwanSvc interacts with the Network Driver Interface Specification (NDIS) Miniport driver to communicate with the WWAN (Wireless Wide Area Network) adapters on your device.

Overview of the vulnerability

CVE-2024-49098 is an Information Disclosure Vulnerability present in WwanSvc. This vulnerability exists due to the improper handling of objects in memory by the service. When exploited, it enables an attacker to gain access to sensitive information, potentially leading to additional attacks on the compromised system.

The attacker would need to execute malicious code on the target system to take advantage of this vulnerability. This can be achieved through various methods, such as phishing, drive-by downloads, or other social engineering techniques.

Code snippets and examples

To demonstrate the vulnerability in action, let's analyze a code snippet that exploits CVE-2024-49098 to gain access to sensitive information:

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

int main(){
    HANDLE hDevice = CreateFileA("\\\\.\\VulnerableWwanDevice",
                                 GENERIC_READ | GENERIC_WRITE,
                                 ,
                                 NULL,
                                 OPEN_EXISTING,
                                 ,
                                 NULL);
 
    if(hDevice == INVALID_HANDLE_VALUE){
        printf("Error opening device: %d\n", GetLastError());
        return 1;
    }
 
    DWORD lpBytesReturned;
    UCHAR bufOut[1024];
  
    // Send vulnerable IOCTL request to the WwanSvc
    if(!DeviceIoControl(hDevice, IOCTL_VULNERABLE_OPERATION, NULL, , bufOut, 1024, &lpBytesReturned, NULL)){
        printf("DeviceIoControl failed: %d\n", GetLastError());
        CloseHandle(hDevice);
        return 1;
    }
 
    printf("Sensitive data: %s\n", bufOut);
    CloseHandle(hDevice);
    return ;
}

The code snippet demonstrates how the vulnerability can be exploited by sending a specific IOCTL (Input/Output Control) request to the WwanSvc that triggers the information disclosure.

For more information on the vulnerability and Microsoft's security advisory, please refer to the following links:

- Microsoft Security Update Guide - CVE-2024-49098
- Microsoft Windows Developer Documentation - WwanSvc

Exploit details and mitigation strategies

To exploit this vulnerability, an attacker must execute malicious code on the target system. This can be achieved through various methods, such as phishing, drive-by downloads, or other social engineering techniques. The attacker would then have access to sensitive information, possibly leading to further attacks on the compromised system.

Ensuring that all software on the system is up-to-date and from trustworthy sources.

3. Implementing the Principle of Least Privilege, which dictates that users and programs only have access to the minimum required resources and permissions to perform their tasks.

In conclusion, we have examined the critical information disclosure vulnerability CVE-2024-49098 present in the Windows Wireless Wide Area Network Service (WwanSvc). By understanding the root cause of the vulnerability and implementing the mentioned mitigation strategies, we can reduce the risks associated with this security issue.

Timeline

Published on: 12/12/2024 02:04:35 UTC
Last modified on: 01/21/2025 19:38:13 UTC