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Dawn is a static analysis security scanner for ruby written web applications. It supports Sinatra, Padrino and Ruby on Rails frameworks.
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README.md

Codesake::Dawn - The security code scanner for Ruby

Codesake::Dawn is a source code scanner designed to review your code for security issues.

Codesake::Dawn is able to scan your ruby standalone programs but its main usage is to deal with web applications. It supports applications written using majors MVC (Model View Controller) frameworks, like:


Gem Version Build Status Dependency Status Coverage Status


Codesake::Dawn version 1.0 has 142 security checks loaded in its knowledge base. Most of them are CVE bulletins, that applies to gems, framework or the ruby interpreter itself.

You can dump all security checks in the knowledge base by using the -k flag:

$ dawn -k|--list-knowledge-base 

Useful in scripts, you can even supply a parameter to -k flag to check if a security control has been implemented or not.

$ dawn -k CVE-2013-6421
07:59:30 [*] dawn v1.0.0 is starting up
CVE-2013-6421 found in knowledgebase.

$ dawn -k this_test_does_not_exist
08:02:17 [*] dawn v1.0.0 is starting up
this_test_does_not_exist not found in knowledgebase

When you run Codesake::Dawn on your code it parses your project Gemfile.lock looking for the gems used and it tries to detect the ruby interpreter version you are using or you declared in your ruby version management tool you like most (RVM, rbenv, ...).

Then the tool tries to detect the MVC framework your web application uses and it applies the security check accordingly. There checks designed to match rails application or checks that are appliable to any ruby code.

Codesake::Dawn can also understand the code in your views and to backtrack sinks to spot cross site scripting and sql injections introduced by the code you actually wrote. In the project roadmap this is the code most of the future development effort will be focused on.

Codesake::Dawn security scan result is a list of vulnerabilities with some mitigation actions you want to follow in order to build a stronger web application.

Installation

You can install latest Codesake::Dawn version, using Rubygems by typing:

gem install codesake-dawn

In order to install a release candidate version, the gem install command line is the following:

$ gem install codesake-dawn --pre

If you want to add dawn to your project Gemfile, you must add the following:

group :development do
  gem 'codesake-dawn', :require=>false
end

And then upgrade your bundle

$ bundle install

You may want to build it from source, so you have to check it out from github first:

$ git clone https://github.com/codesake/codesake-dawn/codesake-dawn.git
$ cd codesake-dawn
$ rake install

And the codesake-dawn gem will be built in a pkg directory and then installed on your system. Please note that you have to manage dependencies on your own this way. It makes sense only if you want to hack the code or something like that.

Usage

You can start your code review with Codesake::Dawn very easily. Simply tell the tool where the project root directory.

Underlying MVC framework is autodetected by Codesake::Dawn using target Gemfile.lock file. If autodetect fails for some reason, the tool will complain about it and you have to specify if it's a rails, sinatra or padrino web application by hand.

Basic usage is to specify some optional command line option to fit best your needs, and to specify the target directory where your code is stored.

$ dawn [options] target

In case of need, there is a quick command line option reference running dawn -h at your OS prompt.

$ bundle exec dawn -h
08:05:21 [*] dawn v1.0.0 is starting up
Usage: dawn [options] target_directory


Examples:$ dawn a_sinatra_webapp_directory
$ dawn -C the_rails_blog_engine
$ dawn -C --output json a_sinatra_webapp_directory

   -r, --rails                  force dawn to consider the target a rails application
   -s, --sinatra                force dawn to consider the target a sinatra application
   -p, --padrino                force dawn to consider the target a padrino application
   -G, --gem-lock               force dawn to scan only for vulnerabilities affecting dependencies in Gemfile.lock
   -D, --debug                  enters dawn debug mode
   -f, --list-known-framework           list ruby MVC frameworks supported by dawn
   -k, --list-knowledgebase [check_name]    list dawn known security checks. If check_name is specified dawn says if check is present or not
   -o, --output [console, json. csv, html]  the output will be in the specified format
   -V, --verbose                the output will be more verbose
   -C, --count-only             dawn will only count vulnerabilities (useful for scripts)
   -z, --exit-on-warn               dawn will return number of found vulnerabilities as exit code
   -v, --version                show version information
   -h, --help                   show this help

Rake task

To include Codesake::Dawn in your rake task list, you simply have to put this line in your Rakefile

require 'codesake/dawn/tasks'

Then executing $ rake -T you will have a dawn:run task you want to execute.

$ rake -T                                                                                                                                                                                                                                                                 (ruby-2.0.0-p353@engage)
rake dawn:run                  # Execute codesake-dawn on the current directory
...

Codesake::Dawn security scan in action

As output, Codesake::Dawn will put all security checks that are failed during the scan.

This the result of Codedake::Dawn running against a Sinatra 1.4.2 web application wrote for a talk I delivered in 2013 at Railsberry conference.

As you may see, Codesake::Dawn first detects MVC running the application by looking at Gemfile.lock, than it discards all security checks not appliable to Sinatra (49 security checks, in version 1.0, especially designed for Ruby on Rails) and it applies them.

$ bundle exec dawn ~/src/hacking/railsberry2013
08:09:47 [*] dawn v1.0.0 is starting up
08:09:47 [$] dawn: scanning /Users/thesp0nge/src/hacking/railsberry2013
08:09:47 [$] dawn: sinatra v1.4.2 detected
08:09:47 [$] dawn: applying all security checks
08:09:47 [$] dawn: 82 security checks applied - 0 security checks skipped
08:09:47 [$] dawn: 1 vulnerabilities found
08:09:47 [$] dawn: CVE-2013-1800 failed
08:09:47 [$] dawn: Description: The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion, a similar vulnerability to CVE-2013-0156.
08:09:47 [$] dawn: Solution: Please use crack gem version 0.3.2 or above. Correct your gemfile
08:09:47 [!] dawn: Evidence:
08:09:47 [!] dawn: Vulnerable crack gem version found: 0.3.1
08:09:47 [*] dawn is leaving

When you run Codesake::Dawn on a web application with up to date dependencies, it's likely to return a friendly no vulnerabilities found message. Keep it up working that way!

This is Codesake::Dawn running against a Padrino web application I wrote for a scorecard quiz game about application security. Italian language only. Sorry.

08:17:09 [*] dawn v1.0.0 is starting up
08:17:09 [$] dawn: scanning /Users/thesp0nge/src/CORE_PROJECTS/scorecard
08:17:09 [$] dawn: padrino v0.11.2 detected
08:17:09 [$] dawn: applying all security checks
08:17:09 [$] dawn: 82 security checks applied - 0 security checks skipped
08:17:09 [*] dawn: no vulnerabilities found.
08:17:09 [*] dawn is leaving

Last example shows Codesake::Dawn against a very simple Sinatra application designed to be buggy:

$ dawn target
08:28:18 [*] dawn v1.0.0 is starting up
08:28:18 [$] dawn: scanning /Users/thesp0nge/tmp/sinatra-vulnerable
08:28:18 [$] dawn: sinatra v1.2.6 detected
08:28:18 [$] dawn: applying all security checks
08:28:18 [$] dawn: 82 security checks applied - 0 security checks skipped
08:28:18 [$] dawn: 5 vulnerabilities found
08:28:18 [$] dawn: Not revised code failed
08:28:18 [$] dawn: Description: Analyzing comments, it seems your code is waiting from some review from you. Please consider take action before putting it in production.
This check will analyze the source code looking for the following patterns: XXX, TO_CHECK, CHECKME, CHECK and FIXME
08:28:18 [$] dawn: Solution: Please review the file fixing the issue.
08:28:18 [!] dawn: Evidence:
08:28:18 [!] dawn: {:filename=>"/Users/thesp0nge/tmp/sinatra-vulnerable/application.rb", :matches=>[{:match=>"# FIXME: I must raise an error here\n", :line=>30}]}
08:28:18 [$] dawn: CVE-2013-0269 failed
08:28:18 [$] dawn: Description: The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7 for Ruby allows remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain internal objects, as demonstrated by conducting a SQL injection attack against Ruby on Rails, aka "Unsafe Object Creation Vulnerability."
08:28:18 [$] dawn: Solution: Please upgrade JSON gem to version 1.5.5, 1.6.8 or 1.7.7 or latest version available
08:28:18 [!] dawn: Evidence:
08:28:18 [!] dawn: Vulnerable json gem version found: 1.4.6
08:28:18 [$] dawn: CVE-2013-1800 failed
08:28:18 [$] dawn: Description: The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion, a similar vulnerability to CVE-2013-0156.
08:28:18 [$] dawn: Solution: Please use crack gem version 0.3.2 or above. Correct your gemfile
08:28:18 [!] dawn: Evidence:
08:28:18 [!] dawn: Vulnerable crack gem version found: 0.3.1
08:28:18 [$] dawn: CVE-2013-4164 failed
08:28:18 [$] dawn: Description: Any time a string is converted to a floating point value, a specially crafted string can cause a heap overflow. This can lead to a denial of service attack via segmentation faults and possibly arbitrary code execution. Any program that converts input of unknown origin to floating point values (especially common when accepting JSON) are vulnerable.
08:28:18 [$] dawn: Solution: All users are recommended to upgrade to Ruby 1.9.3 patchlevel 484, ruby 2.0.0 patchlevel 353 or ruby 2.1.0 preview2.
08:28:18 [!] dawn: Evidence:
08:28:18 [!] dawn: ruby v2.0.0-p247 detected
08:28:18 [$] dawn: 1 reflected XSS found
08:28:18 [$] dawn: request parameter "name"
08:28:18 [*] dawn is leaving

Useful links

Project homepage: http://dawn.codesake.com

Twitter profile: @dawnscanner

Github repository: https://github.com/codesake/codesake-dawn

The list of knowledge base content: http://dawn.codesake.com/knowledge-base

Mailing list: https://groups.google.com/forum/#!forum/codesake-dawn

Supporters

To me as project leader it's very important to have feedbacks.

If you're a proud codesake-dawn user, if you find it useful, if you integrated it in your release process and if you want to openly support the project you can put your reference here.

You can support the project by forking the repo, adding a success story, a statement saying how do you feel the tool or your company logo as well and then submitting a pull request.

More easily you can drop an email to me sending a statement about your success story and I'll put on the website.

Thank you.

Thanks to

saten: first issue posted about a typo in the README

presidentbeef: for his outstanding work that inspired me creating dawn and for double check comparison matrix. Issue #2 is your :)

marinerJB: for misc bug reports and further ideas

Matteo: for ideas on API and their usage with github.com hooks

LICENSE

Copyright (c) 2013, 2014 Paolo Perego

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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