Mr. Audit validates secure code guidelines and security best practices for JavaScript projects.

About

gulp-mraudit is a gulp plugin that ties into the build process and will scan specified JavaScript files to ensure that they conform with security best practices.

This gulp plugin extends gulp-contains for searching specific strings in files.

Example

Add to your Gulpfile a task called securecode that ensures there is no use of insecure functions like eval or child_process.exec in your source code:

1gulp.task('securecode', function() {
2  var options = {
3    errList: {
4      search: [
5        'eval('
6      ],
7      onFound: function (string, file) { 
8        var error = 'Error: found an occurrence of the code: "' + string;
9        console.log(error);
10      }
11    }
12  };
13  gulp.src('gulpfile.js').pipe(mraudit(options));
14});

Then run the task as part of your build process to enforce it:

1$ gulp securecode
2
3lirantal:~/workspace (master) $ gulp securecode
4[07:10:58] Using gulpfile ~/workspace/gulpfile.js
5[07:10:58] Starting 'securecode'...
6[07:10:58] Finished 'securecode' after 12 ms
7
8events.js:141
9      throw er; // Unhandled 'error' event
10      ^
11Error: Your file contains "eval(", it should not.

Gulp Example

The project itself includes a gulpfile.js in the root directory as an example of an operational Gulpfile.

Install

1npm install gulp-mraudit --save

Configuration

The plugin expects to receive an object with two properties: warnList and an errList. This granularity is provided so that project owners can provide callbacks, and warnings when a match is found in the file for any string in the warnList, and can entirely break the build if the errList is matched.

Simple object example:

1var options = {
2  warnList: {
3    search: [
4      ' req.body.'
5    ]
6  },
7  errList: {
8    search: [
9      'eval(',
10      'child_process.exec(',
11      'setTimeout(',
12      'setInterval('
13    ]
14  }
15};

It is also possible to provide an onFound property for each of the errList and warnList properties so that you can completely customize any kind of callback function trigger that happens when a match is found in either case.

Security Best Practices

Out of the box Mr Audit is configured to assert the following list of security best practices:

Option	Description
req.body.	Potential noSQ injection with directly using parsed JSON objects in ExpressJS's req.body. This warning can be wavered if the object being accessed was already sanitized and filtered before. Or if ExpressJS does not use the bodyParser middleware for json or urlencoded options.
child_process.exec(	Potential OS command injection due to the use of directly calling a command line option with .exec where the first argument is the name of a command, which could potentially be originated from user manipulated input.
eval(	Interpreting JavaScript code in real-time on potential user manipulated input could result in malicious JavaScript code executed in the context of the application and complete access to the user's browser.
setTimeout(, setInterval(	Both of these functions can result in malicious JavaScript injection similar to how eval( is dangerous to use.

Author

Liran Tal liran.tal@gmail.com