Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tika | >= 0.1, <= 1.19 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/105585Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:3892
- https://lists.apache.org/thread.html/88de8350cda9b184888ec294c813c5bd8a2081de8fd
- https://security.netapp.com/advisory/ntap-20190903-0002/
- http://www.securityfocus.com/bid/105585Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:3892
- https://lists.apache.org/thread.html/88de8350cda9b184888ec294c813c5bd8a2081de8fd
- https://security.netapp.com/advisory/ntap-20190903-0002/
FAQ
What is CVE-2018-11796?
CVE-2018-11796 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 doc...
How severe is CVE-2018-11796?
CVE-2018-11796 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-11796?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Tika.