Security Advisory WSO2-2017-0185

Published: 6th March 2017

AFFECTED PRODUCTS

WSO2 Application Server 5.3.0

WSO2 Business Process Server 3.6.0

WSO2 Business Rules Server 2.2.0

WSO2 Complex Event Processor 4.2.0

WSO2 Data Analytics Server 3.1.0

WSO2 Data Services Server 3.5.1

WSO2 Enterprise Service Bus 5.0.0

WSO2 Message Broker 3.1.0

OVERVIEW

A potential XML External Entity (XXE) vulnerability has been identified in Carbon Try-it tool of WSO2 Carbon Commons component used in above listed products.

DESCRIPTION

The Carbon Commons component has been identified to have a potential XXE vulnerability in Carbon Try-it tool where the application XML parser is accepting DOCTYPE in provided XML documents either directly or indirectly, using a URL.

 IMPACT

The XXE attacks can affect any trusted system respective to the machine where the parser is located. This attack can result in disclosing local files, denial of service, server-side request forgery, port scanning and other system impacts on affected systems.

SOLUTION

The recommended solution is to apply relevant security updates/patches to products which fix the XXE vulnerability in affected components.

Please see below for details on patching or updating the affected component.

For WSO2 Update Manager (WUM) Supported Products

Please use WUM to update the following products.

For Other Products

Apply the following patches based on your product version by following the instructions in the README file. If you have any questions, post them to security@wso2.com.

Please download the relevant patches based on the products you use following the matrix below. Patches can also be downloaded from http://wso2.com/security-patch-releases/.

NOTES

If you are using newer versions of the products than the ones mentioned in the “SOLUTION” section, this vulnerability is fixed. 

CREDITS

 WSO2 thanks, Marcin Woloszyn for responsibly reporting the identified issues and working with us as we addressed them.