CWE-644 对HTTP头部进行脚本语法转义处理不恰当

Improper Neutralization of HTTP Headers for Scripting Syntax

结构: Simple

Abstraction: Variant

状态: Incomplete

被利用可能性: High

基本描述

The application does not neutralize or incorrectly neutralizes web scripting syntax in HTTP headers that can be used by web browser components that can process raw headers, such as Flash.

扩展描述

An attacker may be able to conduct cross-site scripting and other attacks against users who have these components enabled.

If an application does not neutralize user controlled data being placed in the header of an HTTP response coming from the server, the header may contain a script that will get executed in the client's browser context, potentially resulting in a cross site scripting vulnerability or possibly an HTTP response splitting attack. It is important to carefully control data that is being placed both in HTTP response header and in the HTTP response body to ensure that no scripting syntax is present, taking various encodings into account.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 116 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 116 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

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

常见的影响

可能的缓解方案

Architecture and Design

策略:

Perform output validation in order to filter/escape/encode unsafe data that is being passed from the server in an HTTP response header.

Architecture and Design

策略:

Disable script execution functionality in the clients' browser.

示例代码

例

In the following Java example, user-controlled data is added to the HTTP headers and returned to the client. Given that the data is not subject to neutralization, a malicious user may be able to inject dangerous scripting tags that will lead to script execution in the client browser.

bad Java

分析过的案例

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