TomatoCart with PayPal Express Checkout design flaw vulnerability

2012-10-30T00:00:00
ID VU:207540
Type cert
Reporter CERT
Modified 2012-10-30T00:00:00

Description

Overview

TomatoCart 1.1.7 with PayPal Express Checkout, and possibly other versions, contains a design flaw that may allow an attacker to purchase items for free or less than advertised.

Description

It has been reported that TomatoCart 1.1.7 using the PayPal Express Checkout module in sandbox mode, and possibly other versions, suffers from a design flaw that may allow an attacker to purchase items for free or at a reduced price. An attacker may be able to manipulate the redirection URL from PayPal back to TomatoCart in a way that allows the attacker to purchase items for free or at a reduced price.


Impact

An attacker may be able to purchase items for free or at a reduced price.


Solution

We are currently unaware of a practical solution to this problem. Please consider the following workaround.


Disable PayPal Express

TomatoCart users should disable payments from the PayPal express checkout module until a patch is released.


Vendor Information

Vendor| Status| Date Notified| Date Updated
---|---|---|---
tomatoCart| | 15 Oct 2012| 29 Oct 2012
If you are a vendor and your product is affected, let us know.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | 6.8 | AV:N/AC:L/Au:S/C:N/I:C/A:N
Temporal | 5.5 | E:POC/RL:U/RC:UC
Environmental | 5.5 | CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

  • <http://tomatocart.com/>
  • <http://code.google.com/p/tomatocart-shoppingcart/downloads/detail?name=paypal_express.zip>

Credit

Thanks to Giancarlo Pellegrino for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

  • CVE IDs: CVE-2012-4934
  • Date Public: 08 Oct 2012
  • Date First Published: 30 Oct 2012
  • Date Last Updated: 30 Oct 2012
  • Document Revision: 13