CWE-431 句柄缺失

Missing Handler

结构: Simple

Abstraction: Base

状态: Draft

被利用可能性: unkown

基本描述

A handler is not available or implemented.

扩展描述

When an exception is thrown and not caught, the process has given up an opportunity to decide if a given failure or event is worth a change in execution.

相关缺陷

  • cwe_Nature: ChildOf cwe_CWE_ID: 691 cwe_View_ID: 1000 cwe_Ordinal: Primary

  • cwe_Nature: CanPrecede cwe_CWE_ID: 433 cwe_View_ID: 1000

适用平台

Language: {'cwe_Class': 'Language-Independent', 'cwe_Prevalence': 'Undetermined'}

常见的影响

范围 影响 注释
Other Varies by Context

可能的缓解方案

Implementation

策略:

Handle all possible situations (e.g. error condition).

Implementation

策略:

If an operation can throw an Exception, implement a handler for that specific exception.

示例代码

例

If a Servlet does not catch all exceptions, it may reveal debugging information that will help an adversary form a plan of attack. In the following method a DNS lookup failure will cause the Servlet to throw an exception.

bad Java

protected void doPost (HttpServletRequest req, HttpServletResponse res) throws IOException {
String ip = req.getRemoteAddr();
InetAddress addr = InetAddress.getByName(ip);
...
out.println("hello " + addr.getHostName());
}

When a Servlet throws an exception, the default error response the Servlet container sends back to the user typically includes debugging information. This information is of great value to an attacker.

分类映射

映射的分类名 ImNode ID Fit Mapped Node Name
PLOVER Missing Handler
Software Fault Patterns SFP4 Unchecked Status Condition

引用