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.
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.
Modes of Introduction:
– Architecture and Design
Related Weaknesses
CWE-602
CWE-287
CWE-300
CWE-656
Consequences
Access Control: Bypass Protection Mechanism, Gain Privileges or Assume Identity
Potential Mitigations
Phase: Architecture and Design
Description:
Do not rely on client side data. Always perform server side authentication.
CVE References
- CVE-2006-0230
- Client-side check for a password allows access to a server using crafted XML requests from a modified client.
