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From "Stephan Siano (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAMEL-8312) XML External Entity (XXE) injection in XPath if no type converter for documentType
Date Wed, 04 Feb 2015 07:25:35 GMT
Stephan Siano created CAMEL-8312:
------------------------------------

             Summary: XML External Entity (XXE) injection in XPath if no type converter for
documentType
                 Key: CAMEL-8312
                 URL: https://issues.apache.org/jira/browse/CAMEL-8312
             Project: Camel
          Issue Type: Bug
          Components: camel-core
    Affects Versions: 2.14.1, 2.13.3
            Reporter: Stephan Siano


If the documentType of an XPath expression is set to a class for that no type converter exists
and the data to which the expression is applied is of type WrappedFile or String the XPath
will seem to work anyway. However this setup will make the scenario susceptible to XXE injection
attacks (because the InputSource created from the String or Generic file will be parsed by
a default parser within the XPath evaluation and the XXE will succeed.

Even worse, if the documentType is Document (the default) and the DOM parsing fails because
the document is invalid and contains an XXE injection this will allow DOS attacks on the system.

The two unit tests contained in the patch show these two use cases (and throw a FileNotFoundException
on an unchanged XPath builder).

As a side effect the Exception in the XPathFeatureTest.testXPath changes (because initially
there are errors during type conversion and during XPath evaluation whereas after the patch
processing is stopped after the type conversion error).



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