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.
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.
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.
References
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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
06 March 2019
UID
ibm10730703