CWE-637 詳細

The product uses a more complex mechanism than necessary, which could lead to resultant weaknesses when the mechanism is not correctly understood, modeled, configured, implemented, or used.

導入モード

Architecture and Design
Implementation
Operation

適用可能なプラットフォーム

言語

クラス： Not Language-Specific (Undetermined)

一般的な結果

観察された例

潜在的な緩和策

Phases : Architecture and Design
Security mechanisms should be as simple as possible. Complex security mechanisms may engender partial implementations and compatibility problems, with resulting mismatches in assumptions and implemented security. Avoid complex security mechanisms when simpler ones would meet requirements. Avoid complex data models, and unnecessarily complex operations. Adopt architectures that provide guarantees, simplify understanding through elegance and abstraction, and that can be implemented similarly. Modularize, isolate and do not trust complex code, and apply other secure programming principles on these modules (e.g., least privilege) to mitigate vulnerabilities.
Phases : Requirements
Data specifications should be as simple as possible, because complex data specifications result in complex validation code. Complex tasks and systems may also need to be guarded by complex security checks, so simple systems should be preferred.

脆弱性マッピングノート

理由 : This CWE entry is a Class, but it does not have Base-level children.
コメント : This entry is classified in a part of CWE's hierarchy that does not have sufficiently low-level coverage, which might reflect a lack of classification-oriented weakness research in the software security community. Conduct careful root cause analysis to determine the original mistake that led to this weakness. If closer analysis reveals that this weakness is appropriate, then this might be the best available CWE to use for mapping. If no other option is available, then it is acceptable to map to this CWE.

参考文献

REF-196

The Protection of Information in Computer Systems
Jerome H. Saltzer, Michael D. Schroeder.
http://web.mit.edu/Saltzer/www/publications/protection/

REF-524

Economy of Mechanism
Sean Barnum, Michael Gegick.
https://web.archive.org/web/20220126060058/https://www.cisa.gov/uscert/bsi/articles/knowledge/principles/economy-of-mechanism

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