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


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# File 'lib/msf/core/payload/solaris.rb', line 66

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.


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# File 'lib/msf/core/payload/solaris.rb', line 17

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