CWE-768
Incorrect Short Circuit Evaluation
2009-05-27
00h00 +00:00
00h00 +00:00
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Tên: Incorrect Short Circuit Evaluation
The product contains a conditional statement with multiple logical expressions in which one of the non-leading expressions may produce side effects.
Thông tin chung
Các cách xuất hiện
ImplementationNền tảng áp dụng
Ngôn ngữ
Lớp: Not Language-Specific (Undetermined)Tên: C (Undetermined)
Hậu quả phổ biến
| Phạm vi | Tác động | Khả năng xảy ra |
|---|---|---|
| Confidentiality Integrity Availability | Varies by Context Ghi chú: Widely varied consequences are possible if an attacker is aware of an unexpected state in the product after a conditional. Usage of short circuit evaluation, though well-defined in the C standard, may alter control flow in a way that introduces logic errors that are difficult to detect, possibly causing errors later during the product's execution. It may lead to information exposure, a system crash, or even complete attacker control of the system. | |
| Other | Unexpected State Ghi chú: This may lead to an unexpected state in the program after the execution of the conditional, because short-circuiting logic may prevent the side effects from occurring. | |
| Other | Reduce Maintainability Ghi chú: The usage of short circuit evaluation may decrease the maintainability of the code. |
Các biện pháp giảm thiểu tiềm năng
Phases : ImplementationMinimizing the number of statements in a conditional that produce side effects will help to prevent the likelihood of short circuit evaluation to alter control flow in an unexpected way.
Phương pháp phát hiện
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.)Hiệu quả : High
Ghi chú ánh xạ lỗ hổng
Lý do : 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.Bình luận : 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.
Gửi
| Tên | Tổ chức | Ngày | Ngày phát hành | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | 1.4 |
Sửa đổi
| Tên | Tổ chức | Ngày | Bình luận |
|---|---|---|---|
| CWE Content Team | MITRE | updated Description | |
| CWE Content Team | MITRE | updated Relationships, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Relationships, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Likelihood_of_Exploit, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Common_Consequences, Description | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated Applicable_Platforms, Detection_Factors, Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Common_Consequences, Description, Relationships, Type |
