verify results from the CPAN

App-DubiousHTTP
}

sub categories { @cat }
sub make_response {
    my $page = <<'HTML';
<!doctype html><html><body>
<link rel="stylesheet" href="/stylesheet.css">
<link rel="stylesheet" href="/stylesheet.css">
<link rel="icon" href="/favicon.ico" type="image/vnd.microsoft.icon">
<h1>HTTP standard conformance tests - HTTP evader</h1>

<p>
While HTTP seems to be a simple protocol it is in reality complex enough that
different implementations of the protocol vary how the behave in case of HTTP
responses which are either slightly invalid or valid but uncommon.
These interpretation differences is critical if a firewall behaves
differently then the browser it should protect because it can be abused to
bypass the protection of the firewall.
</p>

<p>
The following tests are intended to test the behavior of browsers regarding
invalid or uncommon HTTP responses. And if there is a firewall or proxy between
the test server and the browser then it can be seen how this affects the results
and if a bypass of the protection would be possible.
More information about bypassing firewalls using interpretation differences can
be found <a href="http://noxxi.de/research/semantic-gap.html">here</a>.
</p>

<ul>
<li><a href=#xhr_eicar>Firewall evasion test - Bulk test with virus payload using XMLHttpRequest</a></li>
<li><a href=#xhr_novirus>Bulk test with innocent payload using XMLHttpRequest</a></li>
<li><a href=#js>Bulk test with innocent payload using script tag</a></li>
<li><a href=#img>Bulk test with innocent payload using img tag</a></li>
<li><a href=#iframe>Bulk test with innocent payload using iframe tag</a></li>
<li><a href=#other>Various non-bulk tests</a></li>
</ul>

<hr>

<a name=xhr_eicar>
<h2>Firewall evasion test - Bulk test with virus payload (XHR)</h2>
</a>

<p>
This bulk test tries to transfer the <a
href="http://www.eicar.org/86-0-Intended-use.html">EICAR test virus</a> from the
server to the client. This test virus is commonly used for basic tests of
antivirus and should be detected by every firewall which does deep
inspection to filter out malware. Since this virus itself is not malicious it is
safe to run this test.
</p><p>
But, the transfer is done with various kinds of uncommon or even invalid HTTP
responses to check if the inspection of the firewall can be bypassed this way.
The response from the server will then compared to the expected payload and
hopefully all transfers will be blocked either by the firewall or are considered
invalid by the browser.
</p><p>
The test uses XMLHttpRequests to issue the request and get the response. In most but
not all cases this shows the same behavior as other HTTP requests by the browser
(i.e. loading image, script,...). But to verify that an evasion is actually
possible with normal download one should use the provided link to actually test
the evasion.
</p>
<p id=test_virus class=runtest><a href="/auto/all/eicar">Run Test with <strong>EICAR test virus</strong> payload</a></p>

<a name=xhr_novirus>
<h2>Bulk test with innocent payload (XHR)</h2>
</a>

<p>
This is the same bulk test as the previous one but this time the payload is
completely innocent. This test can be used to find out the behavior of the
browsers itself, i.e. how uncommon or invalid HTTP responses are handled by the
browser. It can also be used to check if the use of proxies changes this
behavior and if firewalls block innocent payload if it is transferred using an
uncommon or invalid HTTP response.
</p>
<p id=test_novirus class=runtest><a href="/auto/all/novirus.txt">Run Test with <strong>innocent</strong> payload</a></p>

<a name=js>
<h2>Bulk test with innocent Javascript</h2>
</a>

<p>
Contrary to the previous bulk tests this one is not done with XMLHttpRequest but
instead it analyzes which responses will successfully be interpreted as
JavaScript by the browser, i.e. by using the "script" tag.
</p>
<p id=test_js class=runtest><a href="/autojs/all/set_success.js">Run Test with
innocent JavaScript payload</a></p>

<a name=img>
<h2>Bulk test with innocent Image</h2>
</a>

<p>
This bulk test will use "img" tags to download an innocent image to check which
uncommon responses can be used to load images.
</p>
<p id=test_js class=runtest><a href="/autoimg/all/ok.png">Run Test with
innocent image payload</a></p>

<a name=iframe>
<h2>Bulk test with innocent Iframe</h2>
</a>

<p>
This bulk test will use "iframe" tags to download an innocent HTML to check which
uncommon responses can be used to load iframes. <b>Warning!</b>: IE and Edge seem
to have serious problems with some test cases here and will render the page
unresponsive.
</p>
<p id=test_iframe class=runtest><a href="/autohtml/all/parent_set_success.html">Run Test with
innocent iframe payload</a></p>

<a name=other>
<h2>Non-Bulk tests</h2>
</a>

<p>
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