CWE-563 详情

The variable's value is assigned but never used, i.e., is a dead store. That is, after the assignment, the variable is either assigned another value or goes out of scope.

引入方式

Implementation : The variable assignment without use may be vestigial from previous code changes or refactoring, but it is also possible that the unused variable points out a bug.

适用平台

编程语言

类： Not Language-Specific (Undetermined)

常见后果

潜在缓解措施

Phases : Implementation
Remove unused variables from the code.

检测方法

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.)
有效性 : High

漏洞映射说明

依据 : 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.
备注 : 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.

提交记录

修改记录