Initial commit of SSRF mitigations.
This fixes#1908 by creating a *net.Dialer which restricts outbound connections to only allowed IP ranges. This implementation is based on the blog post at https://www.agwa.name/blog/post/preventing_server_side_request_forgery_in_golang
To keep things backwards compatible, by default we'll only block connections to 169.254.169.254, the link-local IP address commonly used in cloud environments to retrieve metadata about the running instance. For other internal addresses (e.g. localhost or RFC 1918 addresses), it's assumed that those are available to Gophish.
To support more secure environments, we introduce the `allowed_internal_hosts` configuration option where an admin can set one or more IP ranges in CIDR format. If addresses are specified here, then all internal connections will be blocked except to these hosts.
There are various bits about this approach I don't really like. For example, since various packages all need this functionality, I had to make the RestrictedDialer a global singleton rather than a dependency off of, say, the admin server. Additionally, since webhooks are implemented via a singleton, I had to introduce a new function, `SetTransport`.
Finally, I had to make an update in the gomail package to support a custom net.Dialer.
I've updated the PapaParse JS library to the latest version from the master branch which supports the `escapeForumlae` option in order to prevent malicious event entries from being parsed and executed by the Gophish user's spreadsheet software.
When a new PapaParse release is created, I'll update this code to use the updated minified file.
This change adds a `GOPHISH_INITIAL_ADMIN_PASSWORD` environment variable so that system administrators can set the initial admin password rather than having it randomly generated. This is especially useful in automated deployment scenarios, or scenarios using Docker (ref #1876, #1874)
This PR adds the initial work to implement a password policy as defined in #1538.
Specifically, this implements the following
* Rate limiting for the login handler
* Implementing the ability for system admins to require a user to reset their password
* Implementing a password policy that requires passwords to be a minimum of 8 characters
* Removes the default password (gophish) for admin users to instead have the password randomly generated when Gophish first starts up
* Adds a password strength meter when choosing a new password
Fixes#1538
Updates the IMAP processing to use a more mature library. This allows for more robust IMAP support.
Additionally, this adds support for reporting emails as attachments.
dependabot[bot]
Glenn Wilkinson
Shubhendra Singh Chauhan
Jordan Wright
ssssdl
Andrew
Stuart Small