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twa's Introduction

twa

A tiny web auditor with strong opinions.

Usage

Dependencies

You'll need bash, awk, curl, and nc, along with a fairly POSIX system.

Auditing

# Audit a site.
$ twa google.com
> FAIL(google.com): HTTP redirects to HTTP (not secure)
> FAIL(google.com): Strict-Transport-Security missing
> MEH(google.com): X-Frame-Options is 'sameorigin', consider 'deny'?
> FAIL(google.com): X-Content-Type-Options missing
> PASS(google.com): X-XSS-Protection specifies mode=block
> FAIL(google.com): Referrer-Policy missing
> FAIL(google.com): Content-Security-Policy missing
> FAIL(google.com): Feature-Policy missing
> PASS(google.com): Site sends 'Server', but probably only a vendor ID: gws
> PASS(google.com): Site doesn't send 'X-Powered-By'
> PASS(google.com): Site doesn't send 'Via'
> PASS(google.com): Site doesn't send 'X-AspNet-Version'
> PASS(google.com): Site doesn't send 'X-AspNetMvc-Version'
> PASS(google.com): No SCM repository at: http://google.com/.git/HEAD
> PASS(google.com): No SCM repository at: http://google.com/.hg/store/00manifest.i
> PASS(google.com): No SCM repository at: http://google.com/.svn/entries

# Audit a site, and be verbose.
$ twa -v google.com

# Audit a site and its www subdomain.
$ twa -w google.com

twa takes one domain at a time, and only audits more than one domain at once in the -w case. If you need to audit multiple domains, run it multiple times.

Each result line comprises a test result, and looks like this:

TYPE(domain): explanation

where TYPE is one of PASS, MEH, FAIL, UNK, SKIP, and FATAL:

  • PASS: The test passed with flying colors.
  • MEH: The test passed, but with one or more things that could be improved.
  • FAIL: The test failed, and should be fixed.
  • UNK: The server gave us something we didn't understand.
  • SKIP: The server gave us something we understood, but that we don't handle yet.
  • FATAL: A really important test failed, and should be fixed immediately.

Scoring

twa can be used alongside tscore, which provides a basic scoring mechanism:

$ twa google.com | tscore
> 35 9 1 6 0 0 0

The score format is score npasses nmehs nfailures nunknowns nskips totally_screwed, so you can do:

$ read -r score npasses nmehs nfailures nunknowns nskips totally_screwed < <(twa google.com | tscore)
$ echo "score: ${score}"

Like twa, tscore is opinionated. You can change its opinions (i.e., it's score weights) by editing it.

Contributing

New checks and refinements to existing ones are welcome and appreciated.

twa's People

Contributors

woodruffw avatar

Watchers

John Haugeland avatar James Cloos avatar  avatar

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