CWE-501 违背信任边界

Trust Boundary Violation

结构: Simple

Abstraction: Base

状态: Draft

被利用可能性: unkown

基本描述

The product mixes trusted and untrusted data in the same data structure or structured message.

扩展描述

A trust boundary can be thought of as line drawn through a program. On one side of the line, data is untrusted. On the other side of the line, data is assumed to be trustworthy. The purpose of validation logic is to allow data to safely cross the trust boundary - to move from untrusted to trusted. A trust boundary violation occurs when a program blurs the line between what is trusted and what is untrusted. By combining trusted and untrusted data in the same data structure, it becomes easier for programmers to mistakenly trust unvalidated data.

适用平台

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

常见的影响

范围	影响	注释
Access Control	Bypass Protection Mechanism

示例代码

例

The following code accepts an HTTP request and stores the username parameter in the HTTP session object before checking to ensure that the user has been authenticated.

bad Java

usrname = request.getParameter("usrname");
if (session.getAttribute(ATTR_USR) == null) {

session.setAttribute(ATTR_USR, usrname);

}

bad C#

usrname = request.Item("usrname");
if (session.Item(ATTR_USR) == null) {

session.Add(ATTR_USR, usrname);

}

Without well-established and maintained trust boundaries, programmers will inevitably lose track of which pieces of data have been validated and which have not. This confusion will eventually allow some data to be used without first being validated.

分类映射

映射的分类名	ImNode ID	Fit	Mapped Node Name
7 Pernicious Kingdoms			Trust Boundary Violation
Software Fault Patterns	SFP23		Exposed Data

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