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

Security Bulletin


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

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

Off

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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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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Document Information

Modified date:
10 July 2018

UID

swg21974270