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Description

Sobelow is a security-focused static analysis tool for the Phoenix framework. For security researchers, it is a useful tool for getting a quick view of points-of-interest. For project maintainers, it can be used to prevent introducing a number of common vulnerabilities.

Currently Sobelow detects some types of the following security issues:

Monthly Downloads: 373,129
Programming language: Elixir
License: Apache License 2.0
Latest version: v0.11.2

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README

Sobelow

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Sobelow is a security-focused static analysis tool for the Phoenix framework. For security researchers, it is a useful tool for getting a quick view of points-of-interest. For project maintainers, it can be used to prevent the introduction of a number of common vulnerabilities.

Currently Sobelow detects some types of the following security issues:

  • Insecure configuration
  • Known-vulnerable Dependencies
  • Cross-Site Scripting
  • SQL injection
  • Command injection
  • Code execution
  • Denial of Service
  • Directory traversal
  • Unsafe serialization

Potential vulnerabilities are flagged in different colors according to confidence in their insecurity. High confidence is red, medium confidence is yellow, and low confidence is green.

A finding is typically marked "low confidence" if it looks like a function could be used insecurely, but it cannot reliably be determined if the function accepts user-supplied input. That is to say, if a finding is marked green, it may be critically insecure, but it will require greater manual validation.

Note: This project is in constant development, and additional vulnerabilities will be flagged as time goes on. If you encounter a bug, or would like to request additional features or security checks, please open an issue!

Installation

To use Sobelow, you can add it to your application's dependencies.

def deps do
  [
    {:sobelow, "~> 0.8", only: :dev}
  ]
end

You can also install Sobelow globally by executing the following from the command line:

$ mix escript.install hex sobelow

To install from the master branch, rather than the latest release, the following command can be used:

$ mix escript.install github nccgroup/sobelow

Use

The simplest way to scan a Phoenix project is to run the following from the project root:

$ mix sobelow

Options

Note: Any path arguments should be absolute paths, or relative to the application root.

  • --root or -r - Specify the application root directory. Accepts a path argument, e.g. ../my_project.

  • --verbose or -v - Print code snippets and additional finding details.

  • --ignore or -i - Ignore given finding types. Accepts a comma-separated list of module names, e.g. XSS.Raw,Traversal.

  • --ignore-files - Ignore files. Accepts a comma-separated list of file names, e.g. config/prod.exs.

  • --details or -d - Get finding-type details. Accepts a single module name, e.g. Config.CSRF.

  • --all-details - Get details of all finding-types.

  • --private - Skip update checks.

  • --router - Specify router location. This only needs to be used if the router location is non-standard. Accepts a path argument, e.g. my/strange/router.ex.

  • --exit - Return non-zero exit status at or above a confidence threshold of low, medium, or high. Defaults to false which returns a zero exit status

  • --threshold - Return findings at or above a confidence level of low (default), medium, or high.

  • --format or -f - Specify findings output format. Accepts a format, e.g. txt or json.

    Note that options such as --verbose will not work with the json format. All json formatted findings contain a type, file, and line key. Other keys may vary.

  • --quiet - Return a single line indicating number of findings. Otherwise, return no output if there are no findings.

  • --compact - Minimal, single-line findings with output colorised according to confidence.

  • --flycheck - Minimal, single-line findings that are compatible with flycheck-based tooling.

  • --save-config - Generates a configuration file based on command line options. See Configuration Files for more information.

  • --config - Run Sobelow with configuration file. See Configuration Files for more information.

  • --mark-skip-all - Mark all displayed findings as skippable.

  • --clear-skip - Clear configuration created by --mark-skip-all.

  • --skip - Ignore findings that have been marked for skipping. See False Positives for more information.

Configuration Files

Sobelow allows users to save frequently used options in a configuration file. For example, if you find yourself constantly running:

$ mix sobelow -i XSS.Raw,Traversal --verbose --exit Low

You can use the --save-config flag to create your .sobelow-conf config file:

$ mix sobelow -i XSS.Raw,Traversal --verbose --exit Low --save-config

This command will create the .sobelow-conf file at the root of your application. You can edit this file directly to make changes.

You can also run the command without any options:

$ mix sobelow --save-config

when you first start out using this package - the generated configuration file will be populated with the default values for each option. (This helps in quickly incorporating this package into a pre-existing codebase.)

Now if you want to run Sobelow with the saved configuration, you can run Sobelow with the --config flag.

$ mix sobelow --config

False Positives

Sobelow favors over-reporting versus under-reporting. As such, you may find a number of false positives in a typical scan. These findings may be individually ignored by adding a # sobelow_skip comment, along with a list of modules, before the function definition.

# sobelow_skip ["Traversal"]
def vuln_func(...) do
  ...
end

When integrating Sobelow into a new project, there can be a large number of false positives. To mark all printed findings as false positives, run sobelow with the --mark-skip-all flag.

Once you have tagged the appropriate findings, run Sobelow with the --skip flag.

$ mix sobelow --skip

While # sobelow_skip comments can only mark function-level findings (and so cannot be used to skip configuration issues), the --mark-skip-all flag can be used to skip any finding type.

Modules

Findings categories are broken up into modules. These modules can then be used to either ignore classes of findings (via the ignore and skip options) or to get vulnerability details (via the details option).

This list, and other helpful information, can be found on the command line:

$ mix help sobelow

Updates

When scanning a project, Sobelow will occasionally check for updates, and will print an alert if a new version is available. Sobelow keeps track of the last update-check by creating a .sobelow file in the root of the scanned project.

If this functionality is not desired, the --private flag can be used with the scan.


*Note that all licence references and agreements mentioned in the Sobelow README section above are relevant to that project's source code only.