COMMON WEAKNESS ENUMERATIONDraft

CWE-603

Use of Client-Side Authentication

A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.

Abstraction

Base

Structure

Simple

Likelihood of Exploit

Medium

Understand the problem

What is the problem?

A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.

Extended description

Client-side authentication is extremely weak and may be breached easily. Any attacker may read the source code and reverse-engineer the authentication mechanism to access parts of the application which would otherwise be protected.

Root cause

How and when does the problem arise?

Lifecycle phase

Architecture and Design

COMMISSION: This weakness refers to an incorrect design related to an architectural security tactic.

Lifecycle phase

Implementation

Risk

What does successful exploitation lead to?

Bypass Protection MechanismGain Privileges or Assume Identity

Affected security scopes: Access Control

Defence

How is it prevented and fixed?

Architecture and Design

Architecture and design approach

Detail
Do not rely on client side data. Always perform server side authentication.
CWE-603: Common Weakness Enumeration Entry CWE-603 · DayBreach Sözlük · DayBreach