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Test ID:1.3.6.1.4.1.25623.1.0.814054
Category:Web application abuses
Title:Apache Tika Server XML Entity Expansion Denial of Service Vulnerability
Summary:The host is installed with Apache Tika Server; and is prone to denial of service vulnerability.
Description:Summary:
The host is installed with Apache Tika Server
and is prone to denial of service vulnerability.

Vulnerability Insight:
The flaw exists because apache tika's
XML parsers were not configured to limit entity expansion.

NOTE: In Apache Tika 1.19 (CVE-2018-11761), 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 1.19 is therefore
still vulnerable to entity expansions.

Vulnerability Impact:
Successful exploitation will allow remote
attackers to cause a denial of service condition.

Affected Software/OS:
Apache Tika Server from versions 0.1 to 1.19

Solution:
Upgrade to Apache Tika Server 1.19.1 or later.
For updates refer to Reference links.

CVSS Score:
7.8

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-11761
Common Vulnerability Exposure (CVE) ID: CVE-2018-11796
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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