CWE-567: Unsynchronized Access to Shared Data in a Multithreaded Context
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
The product does not properly synchronize shared data, such as static variables across threads, which can lead to undefined behavior and unpredictable data changes.
常见后果
影响范围: Confidentiality Integrity Availability
技术影响: Read Application Data Modify Application Data DoS: Instability DoS: Crash, Exit, or Restart
说明: If the shared variable contains sensitive data, it may be manipulated or displayed in another user session. If this data is used to control the application, its value can be manipulated to cause the application to crash or perform poorly.
潜在缓解措施
阶段: Implementation
描述: Remove the use of static variables used between servlets. If this cannot be avoided, use synchronized access for these variables.
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
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 |
|---|---|---|---|
| The CERT Oracle Secure Coding Standard for Java (2011) | VNA00-J | Ensure visibility when accessing shared primitive variables | - |
| The CERT Oracle Secure Coding Standard for Java (2011) | VNA02-J | Ensure that compound operations on shared variables are atomic | - |
| Software Fault Patterns | SFP19 | Missing Lock | - |