Apache Tika is vulnerable to entity expansions which can lead to a denial of service attack
High severity
GitHub Reviewed
Published
Oct 17, 2018
to the GitHub Advisory Database
•
Updated Jan 9, 2023
Package
Affected versions
>= 0.1, < 1.19.1
Patched versions
1.19.1
Description
Published to the GitHub Advisory Database
Oct 17, 2018
Reviewed
Jun 16, 2020
Last updated
Jan 9, 2023
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.
References