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CS-Cart v3.0.4 configured with PayPal Standard Payments design vulnerability

Vulnerability Note VU#583564

Original Release Date: 2013-02-22 | Last Revised: 2013-02-22

Overview

CS-Cart v3.0.4 and possibly other versions configured with PayPal Standard Payment is susceptible to a client-side attack that results in an attacker purchasing items without having to pay for them.

Description

It has been reported that CS-Cart v3.0.4 configured with PayPal Standard Payments contains a design flaw that allows an attacker to buy items without having to pay for them. The parameter for the merchant's PayPal email address is controlled on the client-side and not verified by the server. This allows an attacker to change the PayPal email address to one the attacker controls allowing the attacker to purchase items on a website but effectively pay themselves instead of the merchant. Manual verification of website orders with the PayPal transactions would need to be performed to detect this fraud.

Impact

An attacker can effectively purchase items without paying the merchant for them.

Solution

Update

The vendor has stated that this vulnerability has been addressed in CS-Cart version 3.0.6. They have also released the security patch for the older versions (3.0.x & 2.2.x).

Vendor Information

583564
 

CS-Cart Affected

Notified:  January 24, 2013 Updated: February 18, 2013

Status

Affected

Vendor Statement

We have fixed this vulnerability in CS-Cart version 3.0.6. We also released the security patch for the older versions (3.0.x & 2.2.x).

Vendor Information

We are not aware of further vendor information regarding this vulnerability.


CVSS Metrics

Group Score Vector
Base 7.1 AV:N/AC:M/Au:N/C:N/I:C/A:N
Temporal 4.7 E:U/RL:OF/RC:UC
Environmental 1.3 CDP:L/TD:L/CR:ND/IR:ND/AR:ND

References

Acknowledgements

Thanks to Giancarlo Pellegrino Institute Eurecom and SAP Research for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs: CVE-2013-0118
Date Public: 2013-02-15
Date First Published: 2013-02-22
Date Last Updated: 2013-02-22 13:06 UTC
Document Revision: 11

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