CWE•Base•Draft•8 recent CVEs
CWE-603Use of Client-Side Authentication
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.
Common consequences
- Access Control→Bypass Protection Mechanism,Gain Privileges or Assume Identity
Potential mitigations
- Architecture and DesignDo not rely on client side data. Always perform server side authentication.