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XXE in XML Parser #813

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prodigysml opened this issue Jul 23, 2018 · 1 comment
Closed

XXE in XML Parser #813

prodigysml opened this issue Jul 23, 2018 · 1 comment

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@prodigysml
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prodigysml commented Jul 23, 2018

The Issue

An XML External Entity attack is a type of attack against an application that parses XML input. This attack occurs when XML input containing a reference to an external entity is processed by a weakly configured XML parser. This attack may lead to the disclosure of confidential data, denial of service, server side request forgery, port scanning from the perspective of the machine where the parser is located, and other system impacts.

Where the Issue Occurred

The following code snippet displays the usage of XMLReader without disabling entities:

final XMLReader xmlReader = parser.getXMLReader();
xmlReader.setErrorHandler(new FatalErrorHandler());
xmlReader.setContentHandler(handler);
xmlReader.parse(new InputSource(reader));

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