CWE-305: Authentication Bypass by Primary Weakness

What is CWE-305?

MITRE CWE

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.

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Official definition

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.

Detailed description

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Characteristics

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Modes of introduction

Implementation: REALIZATION: This weakness is caused during implementation of an architectural security tactic.

Common consequences

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Access Control
Bypass Protection Mechanism

Mitigations

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Detection methods

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Representative vulnerabilities

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These examples illustrate this CWE entry and are not an exhaustive list of related vulnerabilities.

CVE-2002-1374The provided password is only compared against the first character of the real password.
CVE-2000-0979The 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.
CVE-2001-0088Chain: 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.

Sources and references

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