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Security Bulletin: Potential Spoofing vulnerability in WebSphere Application Server (CVE-2018-1902)

Security Bulletin


IBM WebSphere Application Server (WAS) is shipped as a component of IBM Rational ClearCase. Information about a security vulnerability affecting WAS has been published in a security bulletin.

Vulnerability Details

Refer to the security bulletin(s) listed in the Remediation/Fixes section.

Affected Products and Versions

IBM Rational ClearCase, ClearCase Remote Client (CCRC) WAN server component.

Versions 8.0.0.x, 8.0.1.x, 9.0.0.x, 9.0.1.x:

  • This vulnerability only applies to the CCRC WAN server component, and only for certain levels of WebSphere Application Server.


Refer to the following security bulletins for vulnerability details and information about fixes addressed by IBM WebSphere Application Server (WAS) which is shipped with IBM Rational ClearCase.

Principal Product and Version(s) Affected Supporting Product and Version Affected Supporting Product Security Bulletin
IBM Rational ClearCase, versions 8.0.0.x, 8.0.1.x, 9.0.0.x, 9.0.1.x IBM WebSphere Application Server versions 7.0, 8.0, 8.5 and 9.0. Security Bulletin: Potential Spoofing vulnerability in WebSphere Application Server (CVE-2018-1902)
ClearCase Versions
Applying the fix
8.0.0.x, 8.0.1.x, 9.0.0.x, 9.0.1.x
  1. Determine the WAS version used by your CCRC WAN server. Navigate to the CCRC profile directory (either the profile you specified when installing ClearCase, or <ccase-home>/common/ccrcprofile), then execute the script: bin/ (UNIX) or bin\versionInfo.bat (Windows). The output includes a section "IBM WebSphere Application Server". Make note of the version listed in this section. Check your installed version of IBM WebSphere Application Server against this bulletin's list of vulnerable versions.
  2. Identify the latest available fix (per the bulletin listed above) for the version of WAS used for CCRC WAN server.
  3. Apply the appropriate WebSphere Application Server fix directly to your CCRC WAN server host. No ClearCase-specific steps are necessary.

For  8.0.x and earlier releases, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations


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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.


Complete CVSS v3 Guide
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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

* 3 May 2019: Original version 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.


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: Rational ClearCase

Component: CCRC WAN Server

Software version: All versions

Operating system(s): AIX, HP-UX, Linux, Solaris, Windows

Reference #: 0877000

Modified date: 03 May 2019