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CVE-2018-11796

Published: 9 October 2018

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
tika
Launchpad, Ubuntu, Debian
xenial Needed

groovy Ignored
(end of life)
kinetic Ignored
(end of life, was needed)
jammy Needed

impish Ignored
(end of life)
lunar Not vulnerable
(1.22-2)
bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needed

hirsute Ignored
(end of life)
trusty Does not exist

upstream
Released (1.19.1)
mantic Not vulnerable
(1.22-2)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H