CWE-766: Critical Data Element Declared Public
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
The product declares a critical variable, field, or member to be public when intended security policy requires it to be private.
常见后果
影响范围: Integrity Confidentiality
技术影响: Read Application Data Modify Application Data
说明: Making a critical variable public allows anyone with access to the object in which the variable is contained to alter or read the value.
影响范围: Other
技术影响: Reduce Maintainability
潜在缓解措施
阶段: Implementation
描述: Data should be private, static, and final whenever possible. This will assure that your code is protected by instantiating early, preventing access, and preventing tampering.
检测方法
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
观察示例
参考: CVE-2010-3860
variables declared public allow remote read of system properties such as user name and home directory.
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 | - | Failure to protect stored data from modification | - |
| The CERT Oracle Secure Coding Standard for Java (2011) | OBJ01-J | Declare data members as private and provide accessible wrapper methods | - |
| Software Fault Patterns | SFP28 | Unexpected access points | - |
| OMG ASCMM | ASCMM-MNT-15 | - |