Class: Rex::Proto::DRDA::Utils

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/drda/utils.rb

Class Method Summary collapse

Class Method Details

._info_accsecrd(ddm) ⇒ Object


69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
# File 'lib/rex/proto/drda/utils.rb', line 69

def self._info_accsecrd(ddm)
  info_hash = {:accsecrd => true}
  ddm.payload.each do |param|
    case param.codepoint
    when Constants::SECMEC
      info_hash[:plaintext_auth] = true if param.payload =~ /\x00\x03/n
    when Constants::SECCHKCD
      info_hash[:security_check_code] = param.payload.unpack("C").first
      # A little spurious? This is always nonzero when there's no SECCHKRM DDM.
      info_hash[:db_login_success] = false unless info_hash[:security_check_code].zero?
    else
      next
    end
  end
  return info_hash
end

._info_excsatrd(ddm) ⇒ Object


52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
# File 'lib/rex/proto/drda/utils.rb', line 52

def self._info_excsatrd(ddm)
  info_hash = {:excsatrd => true}
  ddm.payload.each do |param|
    case param.codepoint
    when Constants::SRVNAM
      info_hash[:instance_name] = Rex::Text.from_ebcdic(param.payload)
    when Constants::SRVCLSNM
      info_hash[:platform] = Rex::Text.from_ebcdic(param.payload)
    when Constants::SRVRLSLV
      info_hash[:version] = Rex::Text.from_ebcdic(param.payload)
    else
      next
    end
  end
  return info_hash
end

._info_rdbnfnrm(ddm) ⇒ Object


86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
# File 'lib/rex/proto/drda/utils.rb', line 86

def self._info_rdbnfnrm(ddm)
  info_hash = {:rdbnfnrm => true}
  info_hash[:database_found] = false
  ddm.payload.each do |param|
    case param.codepoint
    when Constants::RDBNAM
      info_hash[:db_name] = Rex::Text.from_ebcdic(param.payload).unpack("A*").first
    when Constants::SRVDGN
      info_hash[:error_message] = Rex::Text.from_ebcdic(param.payload)
    else
      next
    end
  end
  return info_hash
end

._info_secchkrm(ddm) ⇒ Object


102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
# File 'lib/rex/proto/drda/utils.rb', line 102

def self._info_secchkrm(ddm)
  info_hash = {:secchkrm => true}
  ddm.payload.each do |param|
    case param.codepoint
    when Constants::SRVCOD
      info_hash[:severity_code] = param.payload.unpack("n").first
    when Constants::SECCHKCD
      info_hash[:security_check_code] = param.payload.unpack("C").first
    else
      next
    end
  end
  if info_hash[:serverity].to_i.zero? and info_hash[:security_check_code].to_i.zero?
    info_hash[:db_login_success] = true
  end
  return info_hash
end

.client_auth(args = {}) ⇒ Object

Creates a packet with EXCSAT_DDM and an SECCHK_DDM. In order to ever succeed, you do need a successful probe first.


21
22
23
24
25
26
27
28
29
30
# File 'lib/rex/proto/drda/utils.rb', line 21

def self.client_auth(args={})
  dbname = args[:dbname]
  dbuser = args[:dbuser]
  dbpass = args[:dbpass]
  pkt = [
    ACCSEC_DDM.new(:format => 0x41),
    SECCHK_DDM.new(:dbname => dbname, :dbuser => dbuser, :dbpass => dbpass)
  ]
  pkt.map {|x| x.to_s}.join
end

.client_probe(dbname = nil) ⇒ Object

Creates a packet with EXCSAT_DDM and an ACCSEC_DDM. This will elicit a reponse from the target server.


11
12
13
14
15
16
17
# File 'lib/rex/proto/drda/utils.rb', line 11

def self.client_probe(dbname=nil)
  pkt = [
    EXCSAT_DDM.new,
    ACCSEC_DDM.new(:dbname => dbname)
  ]
  pkt.map {|x| x.to_s}.join
end

.server_packet_info(obj) ⇒ Object


32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
# File 'lib/rex/proto/drda/utils.rb', line 32

def self.server_packet_info(obj)
  info_hash = {}
  return info_hash unless obj.kind_of? Rex::Proto::DRDA::SERVER_PACKET
  obj.each do |ddm|
    case ddm.codepoint
    when Constants::EXCSATRD
      info_hash.merge!(_info_excsatrd(ddm))
    when Constants::ACCSECRD
      info_hash.merge!(_info_accsecrd(ddm))
    when Constants::RDBNFNRM
      info_hash.merge!(_info_rdbnfnrm(ddm))
    when Constants::SECCHKRM
      info_hash.merge!(_info_secchkrm(ddm))
    else
      next
    end
  end
  return info_hash
end