From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Josh perrymon
Sent: Wednesday, September 14, 2005 4:05 PM
To: [email protected]
Subject: [Full-disclosure] Exploiting an online store

 

I was reading an article about an attacker that could have changed a price in an online shopping cart-

 

Snip----

<<SNIP Reshef’s $22.95 to $2.95 sploit>>

 

What are laws on this??  What if the guy did make the transaction using his credit card? Since it is just a web transaction sending html from the client to the server what proof would they have? 

 

Joshua Perrymon

 

IANAL, but I believe that the contract isn’t formed between buyer and seller until the purchase price is accepted on both sides and money changes hands.  The price in a store is analogous to one in a catalog – suggested, and subject to change.  Typically, that means by the seller, but if the buyer does it and the seller accepts the price, then it is a legal transaction.  Once the money is accepted, the seller has agreed to sell at that price, and taken the money, making it difficult for him to suggest that he was unaware.

 

Of course, what typically happens is that the seller goes to ship the item, and sees how much was paid, and sends a bill for the remaining balance before the item is shipped.  Proof isn’t really needed.

 

Tom

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