second-order v3.2 releases: Scans web applications for second-order subdomain takeover

by do son · Published December 25, 2021 · Updated December 29, 2022

Second Order

Scans web applications for second-order subdomain takeover by crawling the app, and collecting URLs (and other data) that match certain rules, or respond in a certain way.

Usage Ideas

This is a list of tips and ideas (not necessarily related to second-order subdomain takeover) on what to use Second Order for.

Check for second-order subdomain takeover: takeover.json. (Duh!)
Collect inline and imported JS code: javascript.json.
Find where a target hosts static files cdn.json. (S3 buckets, anyone?)
Collect <input> names to build a tailored parameter bruteforcing wordlist: parameters.json.
Feel free to contribute more ideas!

Use

Configuration File

Example configuration files are in config

LogQueries: A map of tag-attribute queries that will be searched for in crawled pages. For example, “a”: “href” means log every href attribute of every a tag.
LogNon200Queries: A map of tag-attribute queries that will be searched for in crawled pages, and logged only if they contain a valid URL that doesn’t return a 200 status code.
LogInline: A list of tags whose inline content (between the opening and closing tags) will be logged, like title and script

Output

All results are saved in JSON files that specify what and where data was found

The results of LogQueries are saved in attributes.json

{

    "https://example.com/": {

        "input[name]": [

            "user",

            "id",

            "debug"

        ]

    }

}

The results of LogNon200Queries are saved in non-200-url-attributes.json

{

    "https://example.com/": {

        "script[src]": [

            "https://cdn.old_abandoned_domain.com/app.js",

        ]

    }

}

The results of LogInline are saved in inline.json

{

    "https://example.com/": {

        "title": [

            "Example - Home"

        ]

    },

      "https://example.com/login": {

        "title": [

            "Example - login"

        ]

    }

}