Description

The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

Applicable Platforms
Language Class: All

Time Of Introduction

• Architecture and Design
• Implementation

Common Consequences

Detection Methods
None

Potential Mitigations
None

Relationships
Most "authentication bypass" errors are resultant, not primary.

Demonstrative Examples
None

Observed Examples

1. CVE-2002-1374 : The provided password is only compared against the first character of the real password.
2. CVE-2000-0979 : The password is not properly checked, which allows remote attackers to bypass access controls by sending a 1-byte password that matches the first character of the real password.
3. CVE-2001-0088 : Chain: Forum software does not properly initialize an array, which inadvertently sets the password to a single character, allowing remote attackers to easily guess the password and gain administrative privileges.

White Box Definitions
None

Black Box Definitions
None

Taxynomy Mappings

References:
None