Vulnerabilities > CVE-2018-11796 - XXE vulnerability in Apache Tika

Summary

In Apache Tika 1.19 (CVE-2018-11761), we added an entity expansion limit for XML parsing. However, Tika reuses SAXParsers and calls reset() after each parse, which, for Xerces2 parsers, as per the documentation, removes the user-specified SecurityManager and thus removes entity expansion limits after the first parse. Apache Tika versions from 0.1 to 1.19 are therefore still vulnerable to entity expansions which can lead to a denial of service attack. Users should upgrade to 1.19.1 or later.

Vulnerable Configurations

Common Weakness Enumeration (CWE)

• CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Redhat

References