名前: Use of Inherently Dangerous Function

The product calls a function that can never be guaranteed to work safely, regardless of how it is used.

一般情報

導入モード

Implementation

適用可能なプラットフォーム

言語

名前： C (Undetermined)
名前： C++ (Undetermined)

一般的な結果

スコープ	影響	可能性
Other	Varies by Context 注記：The consequences vary depending on the behavior of the affected function.
Other	Modify Memory 注記：Some functions can be subject to buffer overflows. For example, an attacker can easily send arbitrarily-sized input to gets() and overflow the destination buffer. In C++, an attacker can easily send arbitrarily-sized input to the >> operator and overflow the destination buffer.

観察された例

参考文献	説明
CVE-2007-4004	FTP client uses inherently insecure gets() function and is setuid root on some systems, allowing buffer overflow

潜在的な緩和策

Phases : Build and Compilation // Implementation
Identify a list of prohibited API functions and prohibit developers from using these functions, providing safer alternatives. In some cases, automatic code analysis tools or the compiler can be instructed to spot use of prohibited functions, such as the "banned.h" include file from Microsoft's SDL. [REF-554] [REF-1009] [REF-7]
Phases : Testing
Use grep or static analysis tools to spot usage of dangerous functions.

検出方法

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.)
有効性 : High

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-6

Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors
Katrina Tsipenyuk, Brian Chess, Gary McGraw.
https://cwe.mitre.org/documents/sources/SevenPerniciousKingdoms.pdf

REF-194

Herb Schildt's C++ Programming Cookbook
Herbert Schildt.

登録情報

名前	組織	日付	リリース日	Version
7 Pernicious Kingdoms		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
Sean Eidemiller	Cigital	2008-07-01 +00:00	added/updated demonstrative examples
Eric Dalci	Cigital	2008-07-01 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2008-09-08 +00:00	updated Applicable_Platforms, Relationships, Other_Notes, Taxonomy_Mappings, Type, Weakness_Ordinalities
CWE Content Team	MITRE	2008-11-24 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2009-10-29 +00:00	updated Description, Other_Notes, References
CWE Content Team	MITRE	2010-02-16 +00:00	updated Demonstrative_Examples, References, Relationships
CWE Content Team	MITRE	2010-04-05 +00:00	updated Relationships
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2011-06-27 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2012-05-11 +00:00	updated Relationships
CWE Content Team	MITRE	2012-10-30 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2014-07-30 +00:00	updated Demonstrative_Examples, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2017-11-08 +00:00	updated Causal_Nature, References, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2018-03-27 +00:00	updated References
CWE Content Team	MITRE	2019-01-03 +00:00	updated Relationships
CWE Content Team	MITRE	2020-02-24 +00:00	updated References, Relationships
CWE Content Team	MITRE	2020-12-10 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2021-03-15 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2023-01-31 +00:00	updated Description
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	2024-02-29 +00:00	updated Observed_Examples
CWE Content Team	MITRE	2026-04-30 +00:00	updated Potential_Mitigations, References
CWE Content Team	MITRE	2026-10-28 +00:00	updated Common_Consequences, Description, Diagram, References

CWE-242 詳細

CWE-242