Timo Boehme created UIMA-6064:
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Summary: External DTD usage in XML descriptors disabled during
build revision upgrade
Key: UIMA-6064
URL: https://issues.apache.org/jira/browse/UIMA-6064
Project: UIMA
Issue Type: Bug
Components: Core Java Framework
Affects Versions: 2.10.2SDK
Reporter: Timo Boehme
Between version 2.10.1 and 2.10.2 the XMLParser configuration was changed
(fixed, without the possibility to adjust it) to not allow for DTD and its
loading from external file.
This is done in XMLUtils.createSAXParserFactory() which sets the
DISALLOW_DOCTYPE_DECL and LOAD_EXTERNAL_DTD feature. Before the
SAXParserFactory was created without adjusting these features.
While I understand that this was done to prevent malicious XML from doing nasty
things, the kind how it was done is problematic:
* the change happened in a revision build, no major or minor number change
* it was not documented
* one cannot simply change it back like using an environment variable, method
call etc. - the only workaround is to do a problematic sub-classing of
XMLParser_impl with additional configuration etc.
We use the DTDs for CPE descriptors white a lot to have the descriptor in
modular chunks using entities etc. Thus it is quite important (for the time
being) to use DTD there - and we know that the XML is not problematic.
Because this feature (DTD) is crucial I have marked this as a BUG since such
changes should not occur in a build upgrade or it should at least be possible
to get the old behavior easily back.
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