Détail du CWE-595

The product compares object references instead of the contents of the objects themselves, preventing it from detecting equivalent objects.

For example, in Java, comparing objects using == usually produces deceptive results, since the == operator compares object references rather than values; often, this means that using == for strings is actually comparing the strings' references, not their values.

Modes d'introduction

Implementation

Plateformes applicables

Langue

Name: Java (Undetermined)
Name: JavaScript (Undetermined)
Name: PHP (Undetermined)
Class: Not Language-Specific (Undetermined)

Conséquences courantes

Mesures d’atténuation potentielles

Phases : Implementation
In Java, use the equals() method to compare objects instead of the == operator. If using ==, it is important for performance reasons that your objects are created by a static factory, not by a constructor.

Méthodes de détection

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Efficacité : High

Notes de cartographie des vulnérabilités

Justification : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Commentaire : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Références

REF-954

Equality comparisons and sameness
Mozilla MDN.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Equality_comparisons_and_sameness

Soumission

Modifications