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Michael Glavassevich updated XERCESJ-1759: ------------------------------------------ Summary: Add support for jdk.xml.maxElementDepth to SecureProcessingConfiguration. (was: Parsing xml cannot limit the maximum element depth, resulting in excessive memory usage and DOS.) > Add support for jdk.xml.maxElementDepth to SecureProcessingConfiguration. > ------------------------------------------------------------------------- > > Key: XERCESJ-1759 > URL: https://issues.apache.org/jira/browse/XERCESJ-1759 > Project: Xerces2-J > Issue Type: New Feature > Components: JAXP (javax.xml.parsers), JAXP (javax.xml.validation) > Affects Versions: 2.12.2 > Reporter: shuailingliang > Priority: Major > Labels: security > Attachments: image-2023-09-05-01-37-14-363.png > > > When parsing an xml file similar to the following by calling the > javax.xml.parsers.DocumentBuilder#parse(java.io.File) method, the elements > are nested layer by layer and there is no element closing tag. Since the > depth of elements cannot be verified, the array in > org.apache.xerces.impl.XMLDocumentFragmentScannerImpl#fElementStack will > continue to increase the number of QName objects, resulting in excessive > memory and DOS problems. > > <?xml version=”1.0” encoding=”UTF-8” standalone=”no” ?> > <A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A > a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A > a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”><A a=”1”>… > > After testing, we found that a file of 12.93M will cause an OOM exception in > a service with a maximum heap memory of 250M. > > We checked the jdk information and found that we can limit the nesting depth > of xml elements by setting the system property jdk.xml.maxElementDepth. We > hope xerces can solve this problem. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: j-dev-unsubscr...@xerces.apache.org For additional commands, e-mail: j-dev-h...@xerces.apache.org