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Security Bulletin: Potential cross-site scripting vulnerability in WebSphere Application Server using SIBMsgMigration Utility (CVE-2018-1798)

Security Bulletin


Summary

Potential cross-site scripting vulnerability in WebSphere Application Server using Message Migration Utility (SIBMsgMigration). The Message Migration Utility is not deployed by default. You are only at risk if you have deployed the application.

Vulnerability Details

CVEID: CVE-2018-1798
DESCRIPTION: IBM WebSphere Application Server is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
CVSS Base Score: 6.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/149428 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere Application Server:

  • Version 9.0
  • Version 8.5
  • Version 8.0
  • Version 7.0

Remediation/Fixes

If the SIBMsgMigrationUtility is deployed on your system, it can be safely removed.  It is a utility that has not been used since WebSphere Application Server Version 6.   If the utility was installed with the product (it was an optional feature) it will be located in the installableApps directory.  You may remove the utility or use the interim fix below which will replace it with a non-functioning version.

The recommended solution is to apply the interim fix, Fix Pack or PTF containing the APAR for each named product as soon as practical.

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition:


For V9.0.0.0 through 9.0.0.9:

  • Remove the SIBMsgMigrationUtility

--OR--

  • Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH03492

--OR--

  • Apply Fix Pack 9.0.0.10 or later (targeted availability 4Q 2018).

 

For V8.5.0.0 through 8.5.5.14:

  • Remove the SIBMsgMigrationUtility

--OR--

  • Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH03492

--OR--

  • Apply Fix Pack 8.5.5.15 or later (targeted availability 1Q 2019).

 

For V8.0.0.0 through 8.0.0.15:

  • Remove the SIBMsgMigrationUtility

--OR--

  • Upgrade to 8.0.0.15  and then apply Interim Fix PH03492

 

For V7.0.0.0 through 7.0.0.45:

  • Remove the SIBMsgMigrationUtility

 

WebSphere Application Server V7 and V8 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

 

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM by Benoit Côté-Jodoin from GoSecure

Change History

08 November 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: WebSphere Application Server

Software version: 7.0, 8.0, 8.5, 9.0

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS

Software edition: Advanced, Base, Developer, Enterprise, Express, Network Deployment, Single Server

Reference #: 0730703

Modified date: 08 November 2018


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