Retab lib
This commit is contained in:
parent
bd1fb98e50
commit
40d45d7a28
434
rop.rb
434
rop.rb
|
@ -9,263 +9,263 @@ module Rex
|
|||
module RopBuilder
|
||||
|
||||
class RopBase
|
||||
def initialize()
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
@gadgets = []
|
||||
end
|
||||
def initialize()
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
@gadgets = []
|
||||
end
|
||||
|
||||
def to_csv(gadgets = [])
|
||||
if gadgets.empty? and @gadgets.nil? or @gadgets.empty?
|
||||
@stdio.print_error("No gadgets collected to convert to CSV format.")
|
||||
return
|
||||
end
|
||||
def to_csv(gadgets = [])
|
||||
if gadgets.empty? and @gadgets.nil? or @gadgets.empty?
|
||||
@stdio.print_error("No gadgets collected to convert to CSV format.")
|
||||
return
|
||||
end
|
||||
|
||||
# allow the users to import gadget collections from multiple files
|
||||
if @gadgets.empty? or @gadgets.nil?
|
||||
@gadgets = gadgets
|
||||
end
|
||||
# allow the users to import gadget collections from multiple files
|
||||
if @gadgets.empty? or @gadgets.nil?
|
||||
@gadgets = gadgets
|
||||
end
|
||||
|
||||
table = Rex::Ui::Text::Table.new(
|
||||
'Header' => "#{@file} ROP Gadgets",
|
||||
'Indent' => 1,
|
||||
'Columns' =>
|
||||
[
|
||||
"Address",
|
||||
"Raw",
|
||||
"Disassembly",
|
||||
])
|
||||
table = Rex::Ui::Text::Table.new(
|
||||
'Header' => "#{@file} ROP Gadgets",
|
||||
'Indent' => 1,
|
||||
'Columns' =>
|
||||
[
|
||||
"Address",
|
||||
"Raw",
|
||||
"Disassembly",
|
||||
])
|
||||
|
||||
@gadgets.each do |gadget|
|
||||
table << [gadget[:address], gadget[:raw].unpack('H*')[0], gadget[:disasm].gsub(/\n/, ' | ')]
|
||||
end
|
||||
@gadgets.each do |gadget|
|
||||
table << [gadget[:address], gadget[:raw].unpack('H*')[0], gadget[:disasm].gsub(/\n/, ' | ')]
|
||||
end
|
||||
|
||||
return table.to_csv
|
||||
end
|
||||
return table.to_csv
|
||||
end
|
||||
|
||||
def import(file)
|
||||
begin
|
||||
data = File.new(file, 'r').read
|
||||
rescue
|
||||
@stdio.print_error("Error reading #{file}")
|
||||
return []
|
||||
end
|
||||
def import(file)
|
||||
begin
|
||||
data = File.new(file, 'r').read
|
||||
rescue
|
||||
@stdio.print_error("Error reading #{file}")
|
||||
return []
|
||||
end
|
||||
|
||||
if data.empty? or data.nil?
|
||||
return []
|
||||
end
|
||||
if data.empty? or data.nil?
|
||||
return []
|
||||
end
|
||||
|
||||
data.gsub!(/\"/, '')
|
||||
data.gsub!("Address,Raw,Disassembly\n", '')
|
||||
data.gsub!(/\"/, '')
|
||||
data.gsub!("Address,Raw,Disassembly\n", '')
|
||||
|
||||
@gadgets = []
|
||||
@gadgets = []
|
||||
|
||||
data.each_line do |line|
|
||||
addr, raw, disasm = line.split(',', 3)
|
||||
if addr.nil? or raw.nil? or disasm.nil?
|
||||
@stdio.print_error("Import file format corrupted")
|
||||
return []
|
||||
end
|
||||
disasm.gsub!(/: /, ":\t")
|
||||
disasm.gsub!(' | ', "\n")
|
||||
raw = [raw].pack('H*')
|
||||
@gadgets << {:file => file, :address => addr, :raw => raw, :disasm => disasm.chomp!}
|
||||
end
|
||||
@gadgets
|
||||
end
|
||||
data.each_line do |line|
|
||||
addr, raw, disasm = line.split(',', 3)
|
||||
if addr.nil? or raw.nil? or disasm.nil?
|
||||
@stdio.print_error("Import file format corrupted")
|
||||
return []
|
||||
end
|
||||
disasm.gsub!(/: /, ":\t")
|
||||
disasm.gsub!(' | ', "\n")
|
||||
raw = [raw].pack('H*')
|
||||
@gadgets << {:file => file, :address => addr, :raw => raw, :disasm => disasm.chomp!}
|
||||
end
|
||||
@gadgets
|
||||
end
|
||||
|
||||
def print_msg(msg, color=true)
|
||||
if not @stdio
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
end
|
||||
def print_msg(msg, color=true)
|
||||
if not @stdio
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
end
|
||||
|
||||
if color == true
|
||||
@stdio.auto_color
|
||||
else
|
||||
@stdio.disable_color
|
||||
end
|
||||
@stdio.print_raw(@stdio.substitute_colors(msg))
|
||||
end
|
||||
if color == true
|
||||
@stdio.auto_color
|
||||
else
|
||||
@stdio.disable_color
|
||||
end
|
||||
@stdio.print_raw(@stdio.substitute_colors(msg))
|
||||
end
|
||||
end
|
||||
|
||||
class RopCollect < RopBase
|
||||
def initialize(file="")
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
@file = file if not file.empty?
|
||||
@bin = Metasm::AutoExe.decode_file(file) if not file.empty?
|
||||
@disassembler = @bin.disassembler if not @bin.nil?
|
||||
if @disassembler
|
||||
@disassembler.cpu = Metasm::Ia32.new('386_common')
|
||||
end
|
||||
super()
|
||||
end
|
||||
def initialize(file="")
|
||||
@stdio = Rex::Ui::Text::Output::Stdio.new
|
||||
@file = file if not file.empty?
|
||||
@bin = Metasm::AutoExe.decode_file(file) if not file.empty?
|
||||
@disassembler = @bin.disassembler if not @bin.nil?
|
||||
if @disassembler
|
||||
@disassembler.cpu = Metasm::Ia32.new('386_common')
|
||||
end
|
||||
super()
|
||||
end
|
||||
|
||||
def collect(depth, pattern)
|
||||
matches = []
|
||||
gadgets = []
|
||||
def collect(depth, pattern)
|
||||
matches = []
|
||||
gadgets = []
|
||||
|
||||
# find matches by scanning for the pattern
|
||||
matches = @disassembler.pattern_scan(pattern)
|
||||
if @bin.kind_of?(Metasm::PE)
|
||||
@bin.sections.each do |section|
|
||||
next if section.characteristics.include? 'MEM_EXECUTE'
|
||||
# delete matches if the address is outside the virtual address space
|
||||
matches.delete_if do |ea|
|
||||
va = section.virtaddr + @bin.optheader.image_base
|
||||
ea >= va and ea < va + section.virtsize
|
||||
end
|
||||
end
|
||||
elsif @bin.kind_of?(Metasm::ELF)
|
||||
@bin.segments.each do |seg|
|
||||
next if seg.flags.include? 'X'
|
||||
matches.delete_if do |ea|
|
||||
ea >= seg.vaddr and ea < seg.vaddr + seg.memsz
|
||||
end
|
||||
end
|
||||
elsif @bin.kind_of?(Metasm::MachO)
|
||||
@bin.segments.each do |seg|
|
||||
next if seg.initprot.include? 'EXECUTE'
|
||||
matches.delete_if do |ea|
|
||||
ea >= seg.virtaddr and ea < seg.virtaddr + seg.filesize
|
||||
end
|
||||
end
|
||||
end
|
||||
# find matches by scanning for the pattern
|
||||
matches = @disassembler.pattern_scan(pattern)
|
||||
if @bin.kind_of?(Metasm::PE)
|
||||
@bin.sections.each do |section|
|
||||
next if section.characteristics.include? 'MEM_EXECUTE'
|
||||
# delete matches if the address is outside the virtual address space
|
||||
matches.delete_if do |ea|
|
||||
va = section.virtaddr + @bin.optheader.image_base
|
||||
ea >= va and ea < va + section.virtsize
|
||||
end
|
||||
end
|
||||
elsif @bin.kind_of?(Metasm::ELF)
|
||||
@bin.segments.each do |seg|
|
||||
next if seg.flags.include? 'X'
|
||||
matches.delete_if do |ea|
|
||||
ea >= seg.vaddr and ea < seg.vaddr + seg.memsz
|
||||
end
|
||||
end
|
||||
elsif @bin.kind_of?(Metasm::MachO)
|
||||
@bin.segments.each do |seg|
|
||||
next if seg.initprot.include? 'EXECUTE'
|
||||
matches.delete_if do |ea|
|
||||
ea >= seg.virtaddr and ea < seg.virtaddr + seg.filesize
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
gadgets = process_gadgets(matches, depth)
|
||||
gadgets.each do |gadget|
|
||||
@gadgets << gadget
|
||||
end
|
||||
gadgets
|
||||
end
|
||||
gadgets = process_gadgets(matches, depth)
|
||||
gadgets.each do |gadget|
|
||||
@gadgets << gadget
|
||||
end
|
||||
gadgets
|
||||
end
|
||||
|
||||
def pattern_search(pattern)
|
||||
p = Regexp.new("(" + pattern + ")")
|
||||
matches = []
|
||||
def pattern_search(pattern)
|
||||
p = Regexp.new("(" + pattern + ")")
|
||||
matches = []
|
||||
|
||||
@gadgets.each do |gadget|
|
||||
disasm = ""
|
||||
addrs = []
|
||||
@gadgets.each do |gadget|
|
||||
disasm = ""
|
||||
addrs = []
|
||||
|
||||
gadget[:disasm].each_line do |line|
|
||||
addr, asm = line.split("\t", 2)
|
||||
addrs << addr
|
||||
disasm << asm
|
||||
end
|
||||
gadget[:disasm].each_line do |line|
|
||||
addr, asm = line.split("\t", 2)
|
||||
addrs << addr
|
||||
disasm << asm
|
||||
end
|
||||
|
||||
if gadget[:raw] =~ p or gadget[:disasm] =~ p or disasm =~ p
|
||||
matches << {:gadget => gadget, :disasm => disasm, :addrs => addrs}
|
||||
end
|
||||
end
|
||||
matches.each do |match|
|
||||
@stdio.print_status("gadget with address: %bld%cya#{match[:gadget][:address]}%clr matched")
|
||||
color_pattern(match[:gadget], match[:disasm], match[:addrs], p)
|
||||
end
|
||||
matches
|
||||
end
|
||||
if gadget[:raw] =~ p or gadget[:disasm] =~ p or disasm =~ p
|
||||
matches << {:gadget => gadget, :disasm => disasm, :addrs => addrs}
|
||||
end
|
||||
end
|
||||
matches.each do |match|
|
||||
@stdio.print_status("gadget with address: %bld%cya#{match[:gadget][:address]}%clr matched")
|
||||
color_pattern(match[:gadget], match[:disasm], match[:addrs], p)
|
||||
end
|
||||
matches
|
||||
end
|
||||
|
||||
def color_pattern(gadget, disasm, addrs, p)
|
||||
idx = disasm.index(p)
|
||||
if idx.nil?
|
||||
print_msg(gadget[:disasm])
|
||||
return
|
||||
end
|
||||
def color_pattern(gadget, disasm, addrs, p)
|
||||
idx = disasm.index(p)
|
||||
if idx.nil?
|
||||
print_msg(gadget[:disasm])
|
||||
return
|
||||
end
|
||||
|
||||
disasm = disasm.insert(idx, "%bld%grn")
|
||||
disasm = disasm.insert(idx, "%bld%grn")
|
||||
|
||||
asm = ""
|
||||
cnt = 0
|
||||
colors = false
|
||||
disasm.each_line do |line|
|
||||
# if we find this then we are in the matching area
|
||||
if line.index(/\%bld\%grn/)
|
||||
colors = true
|
||||
end
|
||||
asm << "%clr" + addrs[cnt] + "\t"
|
||||
asm = ""
|
||||
cnt = 0
|
||||
colors = false
|
||||
disasm.each_line do |line|
|
||||
# if we find this then we are in the matching area
|
||||
if line.index(/\%bld\%grn/)
|
||||
colors = true
|
||||
end
|
||||
asm << "%clr" + addrs[cnt] + "\t"
|
||||
|
||||
# color the remaining parts of the gadget
|
||||
if colors and line.index("%bld%grn").nil?
|
||||
asm << "%bld%grn" + line
|
||||
else
|
||||
asm << line
|
||||
end
|
||||
# color the remaining parts of the gadget
|
||||
if colors and line.index("%bld%grn").nil?
|
||||
asm << "%bld%grn" + line
|
||||
else
|
||||
asm << line
|
||||
end
|
||||
|
||||
cnt += 1
|
||||
end
|
||||
asm << "%clr\n"
|
||||
print_msg(asm)
|
||||
end
|
||||
cnt += 1
|
||||
end
|
||||
asm << "%clr\n"
|
||||
print_msg(asm)
|
||||
end
|
||||
|
||||
def process_gadgets(rets, num)
|
||||
ret = {}
|
||||
gadgets = []
|
||||
tmp = []
|
||||
rets.each do |ea|
|
||||
insn = @disassembler.disassemble_instruction(ea)
|
||||
next if not insn
|
||||
def process_gadgets(rets, num)
|
||||
ret = {}
|
||||
gadgets = []
|
||||
tmp = []
|
||||
rets.each do |ea|
|
||||
insn = @disassembler.disassemble_instruction(ea)
|
||||
next if not insn
|
||||
|
||||
xtra = insn.bin_length
|
||||
xtra = insn.bin_length
|
||||
|
||||
num.downto(0) do |x|
|
||||
addr = ea - x
|
||||
num.downto(0) do |x|
|
||||
addr = ea - x
|
||||
|
||||
# get the disassembled instruction at this address
|
||||
di = @disassembler.disassemble_instruction(addr)
|
||||
# get the disassembled instruction at this address
|
||||
di = @disassembler.disassemble_instruction(addr)
|
||||
|
||||
# skip invalid instructions
|
||||
next if not di
|
||||
next if di.opcode.props[:setip]
|
||||
next if di.opcode.props[:stopexec]
|
||||
# skip invalid instructions
|
||||
next if not di
|
||||
next if di.opcode.props[:setip]
|
||||
next if di.opcode.props[:stopexec]
|
||||
|
||||
# get raw bytes
|
||||
buf = @disassembler.read_raw_data(addr, x + xtra)
|
||||
# get raw bytes
|
||||
buf = @disassembler.read_raw_data(addr, x + xtra)
|
||||
|
||||
|
||||
# make sure disassembling forward leads to our instruction
|
||||
next if not ends_with_addr(buf, addr, ea)
|
||||
# make sure disassembling forward leads to our instruction
|
||||
next if not ends_with_addr(buf, addr, ea)
|
||||
|
||||
dasm = ""
|
||||
while addr <= ea
|
||||
di = @disassembler.disassemble_instruction(addr)
|
||||
dasm << ("0x%08x:\t" % addr) + di.instruction.to_s + "\n"
|
||||
addr = addr + di.bin_length
|
||||
end
|
||||
dasm = ""
|
||||
while addr <= ea
|
||||
di = @disassembler.disassemble_instruction(addr)
|
||||
dasm << ("0x%08x:\t" % addr) + di.instruction.to_s + "\n"
|
||||
addr = addr + di.bin_length
|
||||
end
|
||||
|
||||
if not tmp.include?(ea)
|
||||
tmp << ea
|
||||
else
|
||||
next
|
||||
end
|
||||
if not tmp.include?(ea)
|
||||
tmp << ea
|
||||
else
|
||||
next
|
||||
end
|
||||
|
||||
# otherwise, we create a new tailchunk and add it to the list
|
||||
ret = {:file => @file, :address => ("0x%08x" % (ea - x)), :raw => buf, :disasm => dasm}
|
||||
gadgets << ret
|
||||
end
|
||||
end
|
||||
gadgets
|
||||
end
|
||||
# otherwise, we create a new tailchunk and add it to the list
|
||||
ret = {:file => @file, :address => ("0x%08x" % (ea - x)), :raw => buf, :disasm => dasm}
|
||||
gadgets << ret
|
||||
end
|
||||
end
|
||||
gadgets
|
||||
end
|
||||
|
||||
private
|
||||
def ends_with_addr(raw, base, addr)
|
||||
dasm2 = Metasm::Shellcode.decode(raw, @disassembler.cpu).disassembler
|
||||
offset = 0
|
||||
while ((di = dasm2.disassemble_instruction(offset)))
|
||||
return true if (base + offset) == addr
|
||||
return false if di.opcode.props[:setip]
|
||||
return false if di.opcode.props[:stopexec]
|
||||
offset = di.next_addr
|
||||
end
|
||||
false
|
||||
end
|
||||
private
|
||||
def ends_with_addr(raw, base, addr)
|
||||
dasm2 = Metasm::Shellcode.decode(raw, @disassembler.cpu).disassembler
|
||||
offset = 0
|
||||
while ((di = dasm2.disassemble_instruction(offset)))
|
||||
return true if (base + offset) == addr
|
||||
return false if di.opcode.props[:setip]
|
||||
return false if di.opcode.props[:stopexec]
|
||||
offset = di.next_addr
|
||||
end
|
||||
false
|
||||
end
|
||||
|
||||
def raw_instructions(raw)
|
||||
insns = []
|
||||
d2 = Metasm::Shellcode.decode(raw, @disassembler.cpu).disassembler
|
||||
addr = 0
|
||||
while ((di = d2.disassemble_instruction(addr)))
|
||||
insns << di.instruction
|
||||
addr = di.next_addr
|
||||
end
|
||||
insns
|
||||
end
|
||||
def raw_instructions(raw)
|
||||
insns = []
|
||||
d2 = Metasm::Shellcode.decode(raw, @disassembler.cpu).disassembler
|
||||
addr = 0
|
||||
while ((di = d2.disassemble_instruction(addr)))
|
||||
insns << di.instruction
|
||||
addr = di.next_addr
|
||||
end
|
||||
insns
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
|
Loading…
Reference in New Issue