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VersionInferrer

Requirements

  • Python 3
  • pip
  • SQLite or PostgreSQL or both (for easier distribution of the index)

Installation

Download VersionInferrer by cloning this repository, e.g. via

git clone https://github.com/wichmannpas/VersionInferrer.git

Install the required Python packages via:

pip install -r requirements.txt

Optional: If you want to use PostgreSQL, you need to install psycopg2:

pip install psycopg2-binary

or pip install --no-binary :all: psycopg2 (see official documentation) if you want to build the binary yourself (requires a C toolchain).

Configuration

Copy settings_local.py.example to settings_local.py.

Edit settings_local.py to override the default settings in settings.py, e.g. the configuration for PostgreSQL database name, user and password.

Using a prepared Index

Under Releases of VersionInferrer's GitHub repository, there are ready to use indexes which are updated irregularily. By using these precomputed indexes, a lot of computing time is saved which is needed to create the index and this also saves a significant amount of disk space (~30 MB vs. ~5 GB).

Creating the Index

Note: This step is not necessary if a prepared index is used!

Note: Initially, this takes quite a while! On a fairly modern computer (Intel Core i7 2.6 GHz, 16 GB RAM, NVMe SSD) it took about 4,5 hours! After that, subsequent runs of ./update_index.py will only add versions that are not indexed, yet. This will result in much faster, incremental updates of the index.

Note: The index will take some disk space (~800 MB for the database and ~4 GB for the cache with different software versions). Therefore make sure to have enough disk space!

Simply run:

./update_index.py

Distributing the Index

To distribute the index, the larger PostgreSQL database base can be squeezed into a much smaller SQLite database which is even smaller when compressed.

For converting the PostgreSQL database to SQLite, the postgres_to_sqlite in the project root can be used: ./postgres_to_sqlite POSTGRES_DB SQLITE_DB

Usage

Note: On first usage, VersionInferrer will download CVE statistics since 2002 up to now. Depending on your computer and network connection, this will take while (a few minutes).

Single site

Run ./analyze_site.py and pass a URL with the website to analyze, e.g.:

./analyze_site.py https://example.com

For more options see ./analyze_site.py --help.

Multiple sites

VersionInferrer includes a tool for scanning a large list of websites: ./scan_sites.py.

This tool can either scan a manually submitted list in form of a text file with multiple URLs, each on a separate line, by specifiying the name of this file with the --urls-from-file option.

Alternatively, if no list is given, the Majestic Million list is taken automatically.

For further help and more options see ./scan_sites.py --help.

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