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Pedant, a static analysis tool for NASL

Gem Version


If you have Ruby 1.9.3+ and Rubygems installed, you can simply do: gem install nasl-pedant


To check a script, run this: pedant check scriptname.nasl. You can check .inc files the same way. Multiple files can be checked at the same time.

See a [WARN] but there's no explanation of the problem? Try adding -v.


This project uses Bundler.

If you have a brand-new Debian machine, do this as root:

apt-get install ruby-dev rubygems git
gem install bundler

As your regular user:

git clone
cd pedant
bundle install --path vendor/bundle
bundle exec rake test

All the tests should pass!

To run the Pedant command line, do bundle exec ./bin/pedant, which should give a help message.

If you get an error like this, try prefixing your command with bundle exec:

/usr/lib/ruby/2.x.x/rubygems/core_ext/kernel_require.rb:NN:in `require': cannot load such file -- libname (LoadError)


  1. Only works for up to 5.2 code (will not fix, the nasl interpreter can now export an AST)
  2. Some of the checks have inconsistent titles in terms of "truthiness"


  1. Iron out some of the semantics:
    • Currently files are all checked independently: what should be done when we're given .inc and .nasl files in one invocation?
  2. Add a control-flow graph?
  3. Add some kind of taint tracking?