CWE-577 EJB不安全实践：使用套接字
EJB Bad Practices: Use of Sockets
结构: Simple
Abstraction: Variant
状态: Draft
被利用可能性: unkown
基本描述
The program violates the Enterprise JavaBeans (EJB) specification by using sockets.
扩展描述
The Enterprise JavaBeans specification requires that every bean provider follow a set of programming guidelines designed to ensure that the bean will be portable and behave consistently in any EJB container. In this case, the program violates the following EJB guideline: "An enterprise bean must not attempt to listen on a socket, accept connections on a socket, or use a socket for multicast." The specification justifies this requirement in the following way: "The EJB architecture allows an enterprise bean instance to be a network socket client, but it does not allow it to be a network server. Allowing the instance to become a network server would conflict with the basic function of the enterprise bean-- to serve the EJB clients."
相关缺陷
-
cwe_Nature: ChildOf cwe_CWE_ID: 573 cwe_View_ID: 1000 cwe_Ordinal: Primary
-
cwe_Nature: ChildOf cwe_CWE_ID: 573 cwe_View_ID: 699 cwe_Ordinal: Primary
适用平台
Language: {'cwe_Name': 'Java', 'cwe_Prevalence': 'Undetermined'}
常见的影响
| 范围 | 影响 | 注释 |
|---|---|---|
| Other | Quality Degradation |
可能的缓解方案
['Architecture and Design', 'Implementation']
策略:
Do not use Sockets when writing EJBs.
示例代码
例
The following Java example is a simple stateless Enterprise JavaBean that retrieves stock symbols and stock values. The Enterprise JavaBean creates a socket and listens for and accepts connections from clients on the socket.
bad Java
public class StockSymbolBean implements StockSymbolRemote {
ServerSocket serverSocket = null;
Socket clientSocket = null;
public StockSymbolBean() {
} catch (IOException ex) {...}
try {
} catch (IOException e) {...}
}
public String getStockSymbol(String name) {...}
public BigDecimal getStockValue(String symbol) {...}
private void processClientInputFromSocket() {...}
}
And the following Java example is similar to the previous example but demonstrates the use of multicast socket connections within an Enterprise JavaBean.
bad Java
public class StockSymbolBean extends Thread implements StockSymbolRemote {
ServerSocket serverSocket = null;
Socket clientSocket = null;
boolean listening = false;
public StockSymbolBean() {
} catch (IOException ex) {...}
listening = true;
while(listening) {
}
}
public String getStockSymbol(String name) {...}
public BigDecimal getStockValue(String symbol) {...}
public void run() {
} catch (IOException e) {...}
...
}
}
The previous two examples within any type of Enterprise JavaBean violate the EJB specification by attempting to listen on a socket, accepting connections on a socket, or using a socket for multicast.
分类映射
| 映射的分类名 | ImNode ID | Fit | Mapped Node Name |
|---|---|---|---|
| Software Fault Patterns | SFP3 | Use of an improper API |
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