CWE-656 詳細

The product uses a protection mechanism whose strength depends heavily on its obscurity, such that knowledge of its algorithms or key data is sufficient to defeat the mechanism.

導入モード

Architecture and Design
Implementation : REALIZATION: This weakness is caused during implementation of an architectural security tactic.

適用可能なプラットフォーム

言語

クラス： Not Language-Specific (Undetermined)

テクノロジー

クラス： Not Technology-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
Always consider whether knowledge of your code or design is sufficient to break it. Reverse engineering is a highly successful discipline, and financially feasible for motivated adversaries. Black-box techniques are established for binary analysis of executables that use obfuscation, runtime analysis of proprietary protocols, inferring file formats, and others.
Phases : Architecture and Design
When available, use publicly-vetted algorithms and procedures, as these are more likely to undergo more extensive security analysis and testing. This is especially the case with encryption and authentication.
Phases : Architecture and Design
Obscurity can be one small part of defense in depth, since it can create more work for an attacker; however, it is a significant risk if used as the primary means of protection.

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.

ノート

Note that there is a close relationship between this weakness and CWE-603 (Use of Client-Side Authentication). If developers do not believe that a user can reverse engineer a client, then they are more likely to choose client-side authentication in the belief that it is safe.

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-544

Never Assuming that Your Secrets Are Safe
Sean Barnum, Michael Gegick.
https://web.archive.org/web/20220126060054/https://www.cisa.gov/uscert/bsi/articles/knowledge/principles/never-assuming-that-your-secrets-are-safe

REF-542

RFC: 793, TRANSMISSION CONTROL PROTOCOL
Jon Postel, Editor.
https://www.ietf.org/rfc/rfc793.txt

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