CWE-484: Omitted Break Statement in Switch
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
The product omits a break statement within a switch or similar construct, causing code associated with multiple conditions to execute. This can cause problems when the programmer only intended to execute code associated with one condition.
扩展描述
This can lead to critical code executing in situations where it should not.
常见后果
影响范围: Other
技术影响: Alter Execution Logic
说明: This weakness can cause unintended logic to be executed and other unexpected application behavior.
潜在缓解措施
阶段: Implementation
描述: Omitting a break statement so that one may fall through is often indistinguishable from an error, and therefore should be avoided. If you need to use fall-through capabilities, make sure that you have clearly documented this within the switch statement, and ensure that you have examined all the logical possibilities.
阶段: Implementation
描述: The functionality of omitting a break statement could be clarified with an if statement. This method is much safer.
检测方法
方法: White Box
Omission of a break statement might be intentional, in order to support fallthrough. Automated detection methods might therefore be erroneous. Semantic understanding of expected product behavior is required to interpret whether the code is correct.
方法: Black Box
Since this weakness is associated with a code construct, it would be indistinguishable from other errors that produce the same behavior.
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
引入模式
| 阶段 | 说明 |
|---|---|
| Implementation | - |
适用平台
编程语言
分类映射
| 分类名称 | 条目ID | 条目名称 | 映射适配度 |
|---|---|---|---|
| CLASP | - | Omitted break statement | - |
| Software Fault Patterns | SFP4 | Unchecked Status Condition | - |