README.md

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    Brakeman

    Brakeman is a static analysis tool which checks Ruby on Rails applications for security vulnerabilities.

    It targets Rails versions 2.x and 3.x.

    There is also a plugin available for Jenkins/Hudson.

    For even more continuous testing, try the Guard plugin.

    Homepage/News

    Website: http://brakemanscanner.org/

    Twitter: http://twitter.com/brakeman

    Mailing list: brakeman@librelist.com

    Installation

    Using RubyGems:

    gem install brakeman

    From source:

    gem build brakeman.gemspec
    gem install brakeman*.gem

    Usage

    brakeman [app_path]

    It is simplest to run Brakeman from the root directory of the Rails application. A path may also be supplied.

    Options

    To specify an output file for the results:

    brakeman -o output_file

    The output format is determined by the file extension or by using the -f option. Current options are: text, html, tabs, json and csv.

    Multiple output files can be specified:

    brakeman -o output.html -o output.json

    To suppress informational warnings and just output the report:

    brakeman -q

    To see all kinds of debugging information:

    brakeman -d

    Specific checks can be skipped, if desired. The name needs to be the correct case. For example, to skip looking for default routes (DefaultRoutes):

    brakeman -x DefaultRoutes

    Multiple checks should be separated by a comma:

    brakeman -x DefaultRoutes,Redirect

    To do the opposite and only run a certain set of tests:

    brakeman -t SQL,ValidationRegex

    To indicate certain methods are "safe":

    brakeman -s benign_method,totally_safe

    By default, brakeman will assume that unknown methods involving untrusted data are dangerous. For example, this would cause a warning (Rails 2):

    <%= some_method(:option => params[:input]) %>

    To only raise warnings only when untrusted data is being directly used:

    brakeman -r

    By default, each check will be run in a separate thread. To disable this behavior:

    brakeman -n

    Normally Brakeman will parse routes.rb and attempt to infer which controller methods are used as actions. However, this is not perfect (especially for Rails 3). To ignore the automatically inferred routes and assume all methods are actions:

    brakeman -a

    Note that this will be enabled automatically if Brakeman runs into an error while parsing the routes.

    If Brakeman is running a bit slow, try

    brakeman --faster

    This will disable some features, but will probably be much faster (currently it is the same as --skip-libs --no-branching). WARNING: This may cause Brakeman to miss some vulnerabilities.

    By default, Brakeman will return 0 as an exit code unless something went very wrong. To return an error code when warnings were found:

    brakeman -z

    To skip certain files that Brakeman may have trouble parsing, use:

    brakeman --skip-files file1,file2,etc

    Brakeman will raise warnings on models that use attr_protected. To suppress these warnings:

    brakeman --ignore-protected

    To compare results of a scan with a previous scan, use the JSON output option and then:

    brakeman --compare old_report.json

    This will output JSON with two lists: one of fixed warnings and one of new warnings.

    Warning information

    See WARNING_TYPES for more information on the warnings reported by this tool.

    Warning context

    The HTML output format provides an excerpt from the original application source where a warning was triggered. Due to the processing done while looking for vulnerabilities, the source may not resemble the reported warning and reported line numbers may be slightly off. However, the context still provides a quick look into the code which raised the warning.

    Confidence levels

    Brakeman assigns a confidence level to each warning. This provides a rough estimate of how certain the tool is that a given warning is actually a problem. Naturally, these ratings should not be taken as absolute truth.

    There are three levels of confidence:

    • High - Either this is a simple warning (boolean value) or user input is very likely being used in unsafe ways.
    • Medium - This generally indicates an unsafe use of a variable, but the variable may or may not be user input.
    • Weak - Typically means user input was indirectly used in a potentially unsafe manner.

    To only get warnings above a given confidence level:

    brakeman -w3

    The -w switch takes a number from 1 to 3, with 1 being low (all warnings) and 3 being high (only highest confidence warnings).

    Configuration files

    Brakeman options can stored and read from YAML files. To simplify the process of writing a configuration file, the -C option will output the currently set options.

    Options passed in on the commandline have priority over configuration files.

    The default config locations are ./config.yaml, ~/.brakeman/, and /etc/brakeman/config.yaml

    The -c option can be used to specify a configuration file to use.

    License

    The MIT License

    Copyright (c) 2010-2012, YELLOWPAGES.COM, LLC

    Copyright (c) 2012, Twitter, Inc.

    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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    breakman

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