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Security Bulletin: Cross-site scripting vulnerability in OAuth ear in WebSphere Application Server (CVE-2018-1794)

Security Bulletin


Summary

There is a potential cross-site scripting vulnerability in the OAuth ear in WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-1794
DESCRIPTION: IBM WebSphere Application Server using OAuth ear 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/148949 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

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

Note: After the interim fix for this APAR is installed, the fix will not be active until the installed OAuth 2.0 client application, WebSphereOauth20SP.ear, is updated from the (WAS_HOME)/installableApps directory.  

WebSphereOauth20SP.ear may have initially been installed with the installOAuth2Service.py script in the (WAS_HOME)/bin directory.

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

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 PH01753
--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 PH01753
--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 to a minimal fix pack levels as required by interim fix and then apply Interim Fix PH01753

For V7.0.0.0 through 7.0.0.45:
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PH01753

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 Ct-Jodoin

Change History

01 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, Network Deployment, Single Server

Reference #: 0729571

Modified date: 01 October 2018


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