CWE-576 EJB不安全实践：使用Java I/O
EJB Bad Practices: Use of Java I/O
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 the java.io package.
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 use the java.io package to attempt to access files and directories in the file system." The specification justifies this requirement in the following way: "The file system APIs are not well-suited for business components to access data. Business components should use a resource manager API, such as JDBC, to store data."
相关缺陷
-
cwe_Nature: ChildOf cwe_CWE_ID: 695 cwe_View_ID: 1000 cwe_Ordinal: Primary
-
cwe_Nature: ChildOf cwe_CWE_ID: 695 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
Implementation
策略:
Do not use Java I/O when writing EJBs.
示例代码
例
The following Java example is a simple stateless Enterprise JavaBean that retrieves the interest rate for the number of points for a mortgage. In this example, the interest rates for various points are retrieved from an XML document on the local file system, and the EJB uses the Java I/O API to retrieve the XML document from the local file system.
bad Java
public class InterestRateBean implements InterestRateRemote {
private File interestRateFile = null;
public InterestRateBean() {
/ get XML document from the local filesystem /
interestRateFile = new File(Constants.INTEREST_RATE_FILE);
if (interestRateFile.exists())
{
DocumentBuilder db = dbf.newDocumentBuilder();
interestRateXMLDocument = db.parse(interestRateFile);
}
} catch (IOException ex) {...}
}
public BigDecimal getInterestRate(Integer points) {
}
/ member function to retrieve interest rate from XML document on the local file system /
private BigDecimal getInterestRateFromXML(Integer points) {...}
}
This use of the Java I/O API within any kind of Enterprise JavaBean violates the EJB specification by using the java.io package for accessing files within the local filesystem.
An Enterprise JavaBean should use a resource manager API for storing and accessing data. In the following example, the private member function getInterestRateFromXMLParser uses an XML parser API to retrieve the interest rates.
good Java
public class InterestRateBean implements InterestRateRemote {
public InterestRateBean() {
}
public BigDecimal getInterestRate(Integer points) {
}
/ member function to retrieve interest rate from XML document using an XML parser API /
private BigDecimal getInterestRateFromXMLParser(Integer points) {...}
}
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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