名前: Use of Incorrect Operator

The product accidentally uses the wrong operator, which changes the logic in security-relevant ways.

一般情報

導入モード

Implementation : These types of errors are generally the result of a typo by the programmer.

適用可能なプラットフォーム

言語

名前： C (Sometimes)
名前： C++ (Sometimes)
名前： Perl (Sometimes)
クラス： Not Language-Specific (Undetermined)

一般的な結果

スコープ	影響	可能性
Other	Alter Execution Logic 注記：This weakness can cause unintended logic to be executed and other unexpected application behavior.

観察された例

参考文献	説明
CVE-2022-3979	Chain: data visualization program written in PHP uses the "!=" operator instead of the type-strict "!==" operator (CWE-480) when validating hash values, potentially leading to an incorrect type conversion (CWE-704)
CVE-2021-3116	Chain: Python-based HTTP Proxy server uses the wrong boolean operators (CWE-480) causing an incorrect comparison (CWE-697) that identifies an authN failure if all three conditions are met instead of only one, allowing bypass of the proxy authentication (CWE-1390)

検出方法

Automated Static Analysis

This weakness can be found easily using static analysis. However in some cases an operator might appear to be incorrect, but is actually correct and reflects unusual logic within the program.

Manual Static Analysis

This weakness can be found easily using static analysis. However in some cases an operator might appear to be incorrect, but is actually correct and reflects unusual logic within the program.

脆弱性マッピングノート

理由 : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
コメント : 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.

参考文献

REF-18

The CLASP Application Security Process
Secure Software, Inc..
https://cwe.mitre.org/documents/sources/TheCLASPApplicationSecurityProcess.pdf

REF-62

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

REF-1377

csr_regile.sv line 938
https://github.com/HACK-EVENT/hackatdac19/blob/57e7b2109c1ea2451914878df2e6ca740c2dcf34/src/csr_regfile.sv#L938

REF-1378

Fix for csr_regfile.sv line 938
https://github.com/HACK-EVENT/hackatdac19/blob/a7b61209e56c48eec585eeedea8413997ec71e4a/src/csr_regfile.sv#L938C31-L938C56

REF-1534

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

登録情報

名前	組織	日付	リリース日	Version
CLASP		2006-07-19 +00:00	2006-07-19 +00:00	Draft 3

変更履歴

名前	組織	日付	コメント
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Applicable_Platforms, Relationships, Other_Notes, Taxonomy_Mappings
CWE Content Team	MITRE	2008-10-14 +00:00	updated Relationships
CWE Content Team	MITRE	2008-11-24 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2011-09-13 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2012-05-11 +00:00	updated Common_Consequences, References, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2012-10-30 +00:00	updated Demonstrative_Examples, Potential_Mitigations
CWE Content Team	MITRE	2014-06-23 +00:00	updated Applicable_Platforms, Description, Detection_Factors, Other_Notes
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships
CWE Content Team	MITRE	2017-11-08 +00:00	updated Demonstrative_Examples, Taxonomy_Mappings
CWE Content Team	MITRE	2019-01-03 +00:00	updated Relationships
CWE Content Team	MITRE	2020-02-24 +00:00	updated References, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2020-08-20 +00:00	updated Relationships
CWE Content Team	MITRE	2021-03-15 +00:00	updated Demonstrative_Examples, Relationships
CWE Content Team	MITRE	2023-01-31 +00:00	updated Description, Observed_Examples
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2023-10-26 +00:00	updated Observed_Examples
CWE Content Team	MITRE	2024-02-29 +00:00	updated Demonstrative_Examples, References
CWE Content Team	MITRE	2025-12-11 +00:00	updated Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Demonstrative_Examples, Description, Modes_of_Introduction, References, Relationships

CWE-480 詳細

CWE-480