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Security Bulletin: GSKit certificate chain vulnerability in Rational DOORS (CVE-2013-6747)

Security Bulletin


Summary

A vulnerability has been identified in the GSKit component that is utilized by IBM Rational DOORS. A malformed certificate chain can cause the Rational DOORS client application or server process that uses GSKit to hang or crash. Remediation for the issue consists of upgrading Rational DOORS to a fix pack that includes the fix for the GSKit.

Vulnerability Details

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CVE ID:  CVE-2013-6747

Description:
 Rational DOORS uses GSKit for SSL/TLS connections. The GSKit implementation is vulnerable to an attack from a malformed certificate chain. If an attacker uses such a certificate when initiating an SSL/TLS connection, they could cause the Rational DOORS client application or interoperation server process to hang or crash. 
The attack does not require local network access or authentication but specialized knowledge and techniques are required. An exploit would not impact the confidentiality of information or the integrity of data, however availability of the system can be compromised.

CVSS Base Score:
 7.1
CVSS Temporal Score:
 See  https://exchange.xforce.ibmcloud.com/vulnerabilities/89863 for the current score 
CVSS Environmental Score*: Undefined
CVSS Vector: (AV/N:AC/M:Au/N:C/N:I/N:A/C)

Affected Products and Versions

GSKit versions 7.0.4.32, 8.0.13.4, 8.0.14.27

The following Rational DOORS components:

  • Rational DOORS desktop client
  • Rational DOORS database server
  • Rational DOORS interoperation server

Remediation/Fixes

Upgrade to the fix pack that corresponds to the version of Rational DOORS that you are running, as shown in the following table.
The fix packs include an upgrade to GSKit version 7.0.4.48 and/or 8.0.14.35, as shown in the following table.

Upgrade the Rational DOORS client, the Rational DOORS database server, and the Rational DOORS interoperation server.

Rational DOORS version Uses GSKit Upgrade to fix pack
9.3
9.3.0.1 - 9.3.0.7
GSKit v7 9.3.0.8
9.4
9.4.0.1
GSKit v7, v8 9.4.0.2
9.5
9.5.0.1
GSKit v7, v8 9.5.0.2
9.5.1
9.5.1.1
9.5.1.2
GSKit v8 9.5.1.3
9.5.2
9.5.2.1
GSKit v8 9.5.2.2

If you are using Rational DOORS Web Access, after you upgrade but before you start the database, edit the core configuration file and set the required version of the interoperation server to the version of the fix pack upgrade, as described in this procedure.

Procedure:

  1. To edit the Rational DOORS core configuration file, open the festival.xml file, which is in the server\festival\config directory.

  2. Add the following line in the <f:properties> section:

    <f:property name="interop.version" value="9.n.n.n" />

    Replace "9.n.n.n" with the version of the fix pack upgrade: 9.3.0.8, 9.4.0.2, 9.5.0.2, 9.5.1.3, or 9.5.2.2.

  3. Save and close the file.

After this revision, only the specified version of the interoperation server can access the Rational DOORS database.

Workarounds and Mitigations

None

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References

Complete CVSS v2 Guide
On-line Calculator v2

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 23 May 2014: Original copy 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: Rational DOORS
Configuration

Software version: 9.3, 9.3.0.1, 9.3.0.2, 9.3.0.3, 9.3.0.4, 9.3.0.5, 9.3.0.6, 9.3.0.7, 9.4, 9.4.0.1, 9.5, 9.5.0.1, 9.5.1, 9.5.1.1, 9.5.1.2, 9.5.2, 9.5.2.1

Operating system(s): Linux, Solaris, Windows

Reference #: 1671544

Modified date: 23 May 2014