Description

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.

Applicable Platforms
None

Time Of Introduction

• Architecture and Design
• Implementation

Common Consequences

Detection Methods
None

Potential Mitigations

Relationships

Demonstrative Examples
None

Observed Examples

1. CVE-2006-0230 : Client-side check for a password allows access to a server using crafted XML requests from a modified client.

White Box Definitions
None

Black Box Definitions
None

Taxynomy Mappings

References:

1. Mark Dowd John McDonald Justin Schuh .The Art of Software Security Assessment 1st Edition. Addison Wesley. Section:'Chapter 2, "Untrustworthy Credentials", Page 37.'. Published on 2006.