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Security Bulletin: Cross-site scripting vulnerability in CacheMonitor for WebSphere Application Server (CVE-2018-1767)

Security Bulletin


Summary

There is a potential cross-site scripting vulnerability in the Cache Monitor web application in WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-1767
DESCRIPTION: IBM WebSphere Application Server CacheMonitor 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/148621 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:

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

Remediation/Fixes

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

For WebSphere Application Server Liberty:

NOTE: If you apply the ifix, then there are additional steps needed see below

For Liberty:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix  PH02049
--OR--
· Apply Fix Pack 18.0.0.4 or later (targeted availability 4Q 2018).

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

NOTE: If you apply the ifix, then there are additional steps needed see below

For V9.0.0.0 through 9.0.0.9:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix  PH02049
--OR--
· Apply Fix Pack 9.0.0.10 or later (targeted availability 4Q 2018).

For V8.5.0.0 through 8.5.5.14:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH02049
--OR--
· Apply Fix Pack 8.5.5.15 or later (targeted availability 1Q 2019).

For V8.0.0.0 through 8.0.0.15:
· Upgrade v8.0.0.15 and then apply Interim Fix PH02049

For V7.0.0.0 through 7.0.0.45:
· Upgrade to v7.0.0.45 and then apply Interim Fix PH02049

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.

ADDITIONAL STEPS AFTER APPLYING INTERIM FIX:

The interim fix only applies the fix to the CacheMonitor.ear in the installableApps directory.  Additional, manual steps are necessary to apply the fix to the cache monitor that is installed on an application server.  These steps are not necessary if the fix pack was installed.

Use wsadmin to execute the following command for each profile where the cache monitor is installed:

AdminApp.update('Dynamic Cache Monitor', 'file', '[-operation update -contents
\'${profilePath}/installedApps/${cellName}/Dynamic Cache Monitor.ear/CacheMonitor.war/ESIContents.jsp\' -contenturi CacheMonitor.war/ESIContents.jsp]')

Substitute ${profilePath} and ${cellName} with applicable
values for your environment.  


   

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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 vah13

Change History

25 October 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, Liberty, Network Deployment, Single Server

Reference #: 0729547

Modified date: 25 October 2018


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