Security Bulletin: Vulnerability in Apache Standard Taglibs affects Liberty for Java for IBM Bluemix (CVE-2015-0254)

Summary

There is an XML External Entity Injection (XXE) vulnerability in the Apache Standard Taglibs that affects IBM WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2015-0254**
DESCRIPTION:** Apache Standard Taglibs could allow a remote attacker to execute arbitrary code on the system, caused by an XML External Entity Injection (XXE) error when processing XML data. By sending specially-crafted XML data, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/101550 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)

Affected Products and Versions

This vulnerability affects all versions of Liberty for Java in IBM Bluemix up to and including v2.9.

Remediation/Fixes

To upgrade to Liberty for Java v3.0-20160608-1450 or higher, you must re-stage or re-push your application. To check which version of the Liberty for Java runtime your Bluemix application is using, navigate to the “Files” menu item for your application through the Bluemix UI. In the “logs” directory, check the “staging_task.log”.

You can also find this file through the command-line Cloud Foundry client by running the following command:

cf files <appname> logs/staging_task.log

You can see

-----> Liberty Buildpack Version: _________

To re-stage your application using the command-line Cloud Foundry client, use the following command:

cf restage <appname>

To re-push your application using the command-line Cloud Foundry client, use the following command:

cf push <appname>