bugtraq - Re: Adgregate ShopAd widget validation is vulnerable to replay attack

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date: Wed, 8 Apr 2009 00:21:53 -0700
From: Matthew Dempsky <matthew@...psky.org>
To: bugtraq@...urityfocus.com
Subject: Re: Adgregate ShopAd widget validation is vulnerable to replay attack

On Tue, Apr 7, 2009 at 6:56 PM, Matthew Dempsky <matthew@...psky.org> wrote:
> As an update, since I submitted my first message, Adgregate changed
> their validation mechanism.  The current method is still
> intermittently vulnerable to replay attacks, but now there's actually
> an expiration mechanism to deal with.

I've updated http://shinobi.dempsky.org/~matthew/adgregate.html to
handle the new validation mechanism.

It's basically the same as before, except every 5 minutes (aligned
with the hour) the (single, global) validation string changes.  You
can easily retrieve the current one using curl:

$ curl -e https://secure.adgregate.com/vid_m_widget.swf \
>     https://secure.adgregate.com/validatewidget.aspx?wid=1
&validation=3F228F6F-6B30-4BB4-A7D0-EF5D7F4ABD54

I'll continue updating the above URL as they (hopefully) further
revise the scheme, but I'm going to refrain from spamming BugTraq
about it.