CWE-595: Comparison of Object References Instead of Object Contents
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
The product compares object references instead of the contents of the objects themselves, preventing it from detecting equivalent objects.
扩展描述
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.
常见后果
影响范围: Other
技术影响: Varies by Context
说明: This weakness can lead to erroneous results that can cause unexpected application behaviors.
潜在缓解措施
阶段: Implementation
描述: 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.
检测方法
方法: 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.)
有效性: High
引入模式
| 阶段 | 说明 |
|---|---|
| Implementation | - |
适用平台
编程语言
分类映射
| 分类名称 | 条目ID | 条目名称 | 映射适配度 |
|---|---|---|---|
| The CERT Oracle Secure Coding Standard for Java (2011) | EXP02-J | Use the two-argument Arrays.equals() method to compare the contents of arrays | - |
| The CERT Oracle Secure Coding Standard for Java (2011) | EXP02-J | Use the two-argument Arrays.equals() method to compare the contents of arrays | - |
| The CERT Oracle Secure Coding Standard for Java (2011) | EXP03-J | Do not use the equality operators when comparing values of boxed primitives | - |