CAPEC-208 Removing/short-circuiting 'Purse' logic: removing/mutating 'cash' decrements

CAPEC ID: 208

CAPEC-208 Metadata

Likelihood of Attack

Medium

Typical Severity

Medium

Overview

Summary

An attacker removes or modifies the logic on a client associated with monetary calculations resulting in incorrect information being sent to the server. A server may rely on a client to correctly compute monetary information. For example, a server might supply a price for an item and then rely on the client to correctly compute the total cost of a purchase given the number of items the user is buying. If the attacker can remove or modify the logic that controls these calculations, they can return incorrect values to the server. The attacker can use this to make purchases for a fraction of the legitimate cost or otherwise avoid correct billing for activities.

Prerequisites

The targeted server must rely on the client to correctly perform monetary calculations and must fail to detect errors in these calculations.

Potential Solutions / Mitigations

No specific solutions listed.

Related Weaknesses (CWE)

CWE ID Description
CWE-602 Client-Side Enforcement of Server-Side Security

Related CAPECs

CAPEC ID Description
CAPEC-207 An adversary removes or disables functionality on the client that the server assumes to be present and trustworthy.

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