CWE-495 詳細

The product has a method that is declared public, but returns a reference to a private data structure, which could then be modified in unexpected ways.

導入モード

Implementation

適用可能なプラットフォーム

言語

クラス： Object-Oriented (Undetermined)
名前： C (Undetermined)
名前： C++ (Undetermined)
名前： Java (Undetermined)
名前： C# (Undetermined)

一般的な結果

潜在的な緩和策

Phases : Implementation
Declare the method private.
Phases : Implementation
Clone the member data and keep an unmodified version of the data private to the object.
Phases : Implementation
Use public setter methods that govern how a private member can be modified.

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 Variant 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

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