名稱: Use of Wrong Operator in String Comparison

The product uses the wrong operator when comparing a string, such as using "==" when the .equals() method should be used instead.

一般資訊

背景詳情

引入方式

Implementation

適用平台

程式語言

類別： Not Language-Specific (Undetermined)
名稱： Java (Undetermined)
名稱： JavaScript (Undetermined)
名稱： PHP (Undetermined)

常見後果

範圍	影響	可能性
Other	Varies by Context 注意：While this weakness often only affects program correctness, if the equality is used for a security decision, the unintended comparison result could be leveraged to affect program security.

潛在緩解措施

Phases : Implementation
Within Java, use .equals() to compare string values. Within JavaScript, use == to compare string values. Within PHP, use == to compare a numeric value to a string value. (PHP converts the string to a number.)

偵測方法

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

漏洞對應備注

理由說明 : 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.
備註 : 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.

參考資料

REF-62

The Art of Software Security Assessment
Mark Dowd, John McDonald, Justin Schuh.

REF-1534

Automated Technical Debt Measure, Version 2
OMG.
https://www.omg.org/spec/ATDM2/1.0/PDF

提交

名稱	機構	日期	發布日期	Version
CWE Content Team	MITRE	2006-12-15 +00:00	2006-12-15 +00:00	Draft 5

修改記錄

名稱	機構	日期	備註
Eric Dalci	Cigital	2008-07-01 +00:00	updated Potential_Mitigations, Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Description, Relationships
CWE Content Team	MITRE	2008-10-14 +00:00	updated Relationships
CWE Content Team	MITRE	2009-05-27 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2011-03-29 +00:00	updated Demonstrative_Examples, Description, Potential_Mitigations
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2012-05-11 +00:00	updated Demonstrative_Examples, References, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2017-11-08 +00:00	updated Taxonomy_Mappings
CWE Content Team	MITRE	2019-01-03 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2020-02-24 +00:00	updated Relationships
CWE Content Team	MITRE	2020-08-20 +00:00	updated Relationships
CWE Content Team	MITRE	2021-03-15 +00:00	updated Demonstrative_Examples, Description, Potential_Mitigations, Relationships
CWE Content Team	MITRE	2023-04-27 +00:00	updated Detection_Factors, Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2025-04-03 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2025-12-11 +00:00	updated Applicable_Platforms, Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Background_Details, Common_Consequences, Description, References

CWE-597 詳細資料

CWE-597