Check Point Advisories

Apache Struts URLValidator Denial of Service (CVE-2016-4465)

Check Point Reference: CPAI-2016-0601
Date Published: 18 Jul 2016
Severity: Critical
Last Updated: Wednesday 20 July, 2016
Source:
Industry Reference:CVE-2016-4465
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Apache Software Foundation Struts 2 2.3.20 through 2.3.28.1
Apache Software Foundation Struts 2 2.5
Vulnerability Description A denial of service vulnerability exists in Apache Struts URLValidator. The vulnerability is due to insufficient validation of crafted URLs by the URLValidator. A remote, unauthenticated attacker could exploit this vulnerability by sending a crafted HTTP request to a Struts 2 application. Successful attack can result in a denial of service condition.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Apache Struts URLValidator Denial of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Apache Struts URLValidator Denial of Service

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