Improper Restriction of XML External Entity References in Multiple Components

Multiple components in Apache NiFi 0.0.1 to 1.16.0 do not restrict XML External Entity references in the default configuration. The Standard Content Viewer service attempts to resolve XML External Entity references when viewing formatted XML files. The following Processors attempt to resolve XML External Entity references when configured with default property values: - EvaluateXPath - EvaluateXQuery - ValidateXml Apache NiFi flow configurations that include these Processors are vulnerable to malicious XML documents that contain Document Type Declarations with XML External Entity references. The resolution disables Document Type Declarations in the default configuration for these Processors, and disallows XML External Entity resolution in standard services.

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XML外部实体引用的不恰当限制(XXE)

Apache NiFi 代码问题漏洞

Apache NiFi是美国阿帕奇（Apache）基金会的一套数据处理和分发系统。该系统主要用于数据路由、转换和系统中介逻辑。 Apache NiFi 0.0.1版本至1.16.0版本存在安全漏洞，该漏洞源于多个组件在默认配置中不限制XML外部实体引用。该解决方案在这些处理器的默认配置中禁用文档类型声明，并在标准服务中禁止XML外部实体解析。

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