Security Bulletin: A vulnerability in the GSKit component of IBM Rational ClearCase (CVE-2016-0201)

Summary

A vulnerability has been addressed in the GSKit component of IBM Rational ClearCase.

Vulnerability Details

CVEID: CVE-2016-0201 DESCRIPTION: IBM GSKit could allow a remote attacker to obtain sensitive information, caused by an MD5 collision. An attacker could exploit this vulnerability to obtain authentication credentials.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109310 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:N/A:N)

Affected Products and Versions

CCRC WAN Server:
Rational ClearCase versions from 7.1.2.9 through 7.1.2.18, 8.0 through 8.0.0.17, and 8.0.1 through 8.0.1.10, all platforms.

CMI and OSLC integrations:

Rational ClearCase versions from 7.1.2.9 through 7.1.2.18, 8.0.0.4 through 8.0.0.17, and 8.0.1 through 8.0.1.10, Windows only.

The IBM GSKit is used if ClearCase on Windows platforms is configured to integrate with IBM Rational ClearQuest, Rational Team Concert, or Jira with communication over SSL (https). This applies to any integration using Change Management Interface (CMI), and to non-CMI based UCM-enabled CQ integration via OSLC. If your ClearCase deployment is not using these integrations, or not using SSL with the integrations, then your deployment is not sensitive to this attack.

The UCM-enabled CQ integration without using OSLC (SQUID) is not sensitive to this attack.

CMI and OSLC integrations

ClearCase Windows Client or WAN server Version

|

Status

—|—

8.0.1 through 8.0.1.10

|

Affected if you use CMI or OSLC integrations, or CCRC WAN server

8.0.0.4 through 8.0.0.17

|

Affected if you use CMI or OSLC integrations, or CCRC WAN server

8.0 through 8.0.0.3

|

Affected only if you use CCRC WAN server

7.1.2.9 through 7.1.2.18

|

Affected if you use CMI or OSLC integrations, or CCRC WAN server

7.1.2 through 7.1.2.8

|

Not affected

7.1.0.x, 7.1.1.x

|

Not affected

Remediation/Fixes

CCRC WAN Server:
Apply an IHS fix for the issue:

1. Determine the IHS version used by your CCRC WAN server. Navigate to the IBM HTTP Server installation directory (typically /opt/ibm/HTTPServer or C:\Program Files (x86)\IBM\HTTPServer), then execute the script: bin/versionInfo.sh (UNIX) or bin\versionInfo.bat (Windows). The output includes a section “IBM HTTP Server for WebSphere Application Server”. Make note of the version listed in this section.
2. Review the following IHS security bulletin for the available fixes: _ _Security Bulletin:Vulnerabilities in the GSKit component of IBM HTTP Server (CVE-2016-0201 and CVE-2015-7420).**Note: **there may be newer security fixes for IBM HTTP Server. Follow the link below (in the section “Get Notified about Future Security Bulletins”) to subscribe to WebSphere product support alerts for additional security fixes.
3. Apply the relevant fixes to your IBM HTTP Server installation used on your CCRC WAN server host. No ClearCase-specific steps are necessary.

CMI and OSLC integrations:
The solution is to install a newer, fixed version of the GSKit runtime component.

Affected Versions

|

** Applying the fix**

—|—

8.0.1 through 8.0.1.10

| Install Rational ClearCase Fix Pack 11 (8.0.1.11) for 8.0.1

8.0.0.4 through 8.0.0.17

| Install Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0

7.1.2.x (all fix packs)
7.1.1.x (all fix packs)
7.1.0.x (all fix packs)

| Customers on extended support contracts should contact Customer Support.

For affected 7.1.x and 7.0.x releases, IBM recommends upgrading to a fixed, supported version of the product.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Subscribe to [My Notifications](< http://www-01.ibm.com/software/support/einfo.html&gt;) to be notified of important product support alerts like this.

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

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

• 28 January 2016: Original version published
• 27 May 2016: Revised for new fix packs

*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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. “Affected Products and Versions” referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Internal Use Only

The fixes are on the test fix portal:
8.0.0.17_gskit
8.0.1.10_gskit

The fixes are LA iFixes that apply on top of the 2015D fix packs
(8.0.0.17, 8.0.1.10). Customers should upgrade to those
releases before applying these fixes.

7.1.2.x customers: only one is entitled to security support (Lloyds), contact Adam Levensohn if they request a fix.

For each platform, for each affected release, there is a zip file on the
Rational fix portal with the fixes, and a matching README file with
manual installation instructions. The customer should download the
fixes and READMEs for their platform(s)/release(s).

The plan is to incorporate all these fixes in 2016A fix packs, but we
are publishing them early to meet the IBM security team’s guidelines.

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