Synopsis
A web application running on the remote host uses a Java framework that is affected by multiple vulnerabilities.
Description
The version of Apache Struts running on the remote host is 2.1.x subsequent or equal to 2.1.2, 2.2.x, 2.3.x prior to 2.3.34, or 2.5.x prior to 2.5.13. It is, therefore, affected by multiple vulnerabilities:
- A remote code execution vulnerability in the REST plugin. The Struts REST plugin uses an XStreamHandler with an instance of XStream for deserialization and does not perform any type filtering when deserializing XML payloads. This can allow an unauthenticated, remote attacker to execute arbitrary code in the context of the Struts REST plugin by sending a specially crafted XML payload. (CVE-2017-9805)
- A denial of service vulnerability in the XStream XML deserializer in the XStreamHandler used by the REST plugin. (CVE-2017-9793)
- A denial of service vulnerability when using URLValidator.
(CVE-2017-9804)
- A flaw exists related to 'freemarker' tags, expression literals, 'views/freemarker/FreemarkerManager.java', and forced expressions that allows arbitrary code execution.
(CVE-2017-12611)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Apache Struts version 2.3.34 or 2.5.13 or later.