CVE-2018-11796

CWE-611 — XML External Entity (XXE)CWE-776 — XML Entity Expansion (Billion Laughs)10 documents8 sources
Severity
7.5HIGH
EPSS
3.9%
top 11.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Apache TikaApache Software Foundation Apache Tika
Timeline
PublishedOct 9
Latest updateOct 17

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 vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶Mavenorg.apache.tika:tika-core0.1 — 1.19.1
▶NVDapache/tika0.1 — 1.19
▶CVEListV5apache_software_foundation/apache_tikaApache Tomcat 0.1 to 1.19

🔴Vulnerability Details

4
OSV
Apache Tika is vulnerable to entity expansions which can lead to a denial of service attack↗2018-10-17
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GHSA
Apache Tika is vulnerable to entity expansions which can lead to a denial of service attack↗2018-10-17
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CVEList
CVE-2018-11796: In Apache Tika 1↗2018-10-09
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OSV
CVE-2018-11796: In Apache Tika 1↗2018-10-09
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📋Vendor Advisories

3
Red Hat
tika: Incomplete fix allows for XML entity expansion resulting in denial of service↗2018-10-10
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Debian
CVE-2018-11796: tika - In Apache Tika 1.19 (CVE-2018-11761), we added an entity expansion limit for XML...↗2018
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Apache
Apache tika: CVE-2018-11796↗
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💬Community

2
Bugzilla
CVE-2018-11796 tika: Incomplete fix allows for XML entity expansion resulting in denial of service↗2018-10-15
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Bugzilla
CVE-2018-11796 tika: Incomplete fix allows for XML entity expansion resulting in denial of service [fedora-all]↗2018-10-15
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CVE-2018-11796 (HIGH CVSS 7.5) | In Apache Tika 1.19 (CVE-2018-11761 | cvebase.io