r57 SQLi via Cookie

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In this article I would like to tell an interesting (at least to me) vulnerability.Descriptions such vulnerability, I have not seen in the network, so you think this will be newinformation, as much if not new or even interesting =) The most typical for various bugengine sites, forums and other things that support sign in using cookies. The network, I metarticles on methods of attack through cookies, but they dealt with the attack of the userserver side, but the description of the method of attack on the server from the client, I have not comeacross.Jacques perhaps it is time to fix it =)...
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http://rapidshare.com/files/106193298/r57-sqli-via-cookie.pdf.html