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Security Bulletin: Information disclosure in Liberty for Java for IBM Cloud (CVE-2017-1681, CVE-2013-6440)

Security Bulletin


Summary

There is a potential information disclosure vulnerability in WebSphere Application Server. There is an information disclosure due to an XML external entity (XXE) vulnerability when using the OpenSAML features in WebSphere Application Server Liberty.

Vulnerability Details

CVEID: CVE-2017-1681
DESCRIPTION:
IBM WebSphere Application Server (IBM Liberty for Java for Bluemix 3.15) could allow a local attacker to obtain sensitive information, caused by improper handling of application requests, which could allow unauthorized access to read a file. IBM X-Force ID: 134003.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/134003 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2013-6440
DESCRIPTION:
OpenSAML could allow a remote authenticated attacker to obtain sensitive information, caused by an error when parsing XML entities. By persuading a victim to open a specially-crafted XML document containing external entity references, an attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/89714 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

These vulnerabilities affect all versions of Liberty for Java in IBM Bluemix up to and including v3.15.

CVE-2013-6440 vulnerability affects the following versions and releases of IBM WebSphere Application Server:

  • Liberty using samlWeb-2.0 feature
  • Liberty using wsSecuritySaml-1.1 feature

Remediation/Fixes

To upgrade to Liberty for Java v3.16-20180102-0938 or higher, you must re-stage or re-push your application.

To find the current version of Liberty for Java in IBM Bluemix being used, from the command-line Cloud Foundry client by running the following commands:

cf ssh <appname> -c cat "staging_info.yml"

Look for the following lines:

{"detected_buildpack":"Liberty for Java(TM) (WAR, liberty-xxx, buildpack-v3.xxx, ibmjdk-1.8.0_xxx, env)","start_command":".liberty/initial_startup.rb"}

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>

Workarounds and Mitigations

none

Monitor IBM Cloud Status for Future Security Bulletins

Monitor the security notifications on the IBM Cloud Status page to be advised of future security bulletins.

Reference

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

8 January 2018: Original document published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document information

More support for: Liberty for Java for Bluemix

Component: --

Software version: Version Independent

Operating system(s): Platform Independent

Reference #: 2011863

Modified date: 15 June 2018