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XXE in ProfileDiagramServices via plugin.xml file #1035

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ProDigySML opened this Issue Oct 24, 2018 · 0 comments

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ProDigySML commented Oct 24, 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

final DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = null;
try {
builder = builderFactory.newDocumentBuilder();
} catch (final ParserConfigurationException e) {
LogServices.INSTANCE.error(exceptionMsg, e);
}
org.w3c.dom.Document document = null;
try {
if (builder != null) {
document = builder.parse(pluginXML.getLocation().toFile());

Remediation

https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Prevention_Cheat_Sheet

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