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Security Bulletin: Security vulnerabilities have been identified in IBM WebSphere Application Server that is shipped with IBM Rational ClearCase (CVE-2018-1904, CVE-2018-1926)

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 7.0, 8.0, 8.5 and 9.0.

Security Bulletin: Potential Remote code execution vulnerability in WebSphere Application Server (CVE-2018-1904)

Security Bulletin: Potential cross-site request forgery in WebSphere Application Server Admin Console (CVE-2018-1926)


ClearCase Versions
Applying the fix
  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(es) (per the bulletins listed above) for the version of WAS used for CCRC WAN server.
  3. Apply the appropriate WebSphere Application Server fix(es) 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


Get Notified about Future Security Bulletins

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.



Change History

18 December 2018: 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.

Internal Use Only

CVEID: CVE-2018-1904
DESCRIPTION: IBM WebSphere Application Server could allow remote attackers to execute arbitrary Java code through an administrative client class with a serialized object from untrusted sources.
CVSS Base Score: 8.1
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-1926
DESCRIPTION: IBM WebSphere Application Server Admin Console is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading a user to visit a malicious URL, a remote attacker could send a specially-crafted request. An attacker could exploit this vulnerability to perform CSRF attack and update available applications.
CVSS Base Score: 4.3
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)

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Document Information

Modified date:
18 December 2018