Module: Contrast::Agent::Protect::Policy::AppliesPathTraversalRule

Extended by:
RuleApplicator
Defined in:
lib/contrast/agent/protect/policy/applies_path_traversal_rule.rb

Overview

This Module is how we apply the Path Traversal rule. It is called from our patches of the targeted methods in which File or IO access occur. It is responsible for deciding if the infilter methods of the rule should be invoked.

Class Method Summary collapse

Methods included from RuleApplicator

apply_rule

Methods included from Components::Interface

included

Class Method Details

.invoke(method, _exception, properties, object, args) ⇒ Object 



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# File 'lib/contrast/agent/protect/policy/applies_path_traversal_rule.rb', line 20

def invoke method, _exception, properties, object, args
  return unless args&.any?

  path = args[0]
  return unless path.is_a?(String)
  return if skip_analysis?

  action = properties['action']
  write_marker = write?(action, *args)
  possible_write = write_marker && possible_write?(write_marker)
  path_traversal_rule(path, possible_write, object, method)

  # If the action was copy, we need to handle the write half of it.
  # We handled read in line above.
  return unless action == COPY
  return unless args.length > 1

  dst = args[1]
  return unless dst.is_a?(String)

  path_traversal_rule(dst, true, object, method)
end