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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.2440
         Security Bulletin: TLS padding vulnerability affects IBM
                      Rational DOORS (CVE-2014-8730)
                             18 December 2014

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Rational DOORS
Publisher:         IBM
Operating System:  Windows
Impact/Access:     Access Privileged Data -- Remote with User Interaction
                   Reduced Security       -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-8730  

Reference:         ESB-2014.2421
                   ESB-2014.2407
                   ESB-2014.2404
                   ESB-2014.2375
                   ESB-2014.2325

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21692972

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: TLS padding vulnerability affects IBM Rational DOORS 
(CVE-2014-8730)

Security Bulletin

Document information

More support for:

Rational DOORS

General Information

Software version:

9.3, 9.4, 9.5, 9.6

Operating system(s):

Windows

Reference #:

1692972

Modified date:

2014-12-16

Summary

Transport Layer Security (TLS) padding vulnerability via a POODLE (Padding 
Oracle On Downgraded Legacy Encryption) like attack affects IBM Rational 
DOORS.

Vulnerability Details

CVE-ID: CVE-2014-8730

Description: Product could allow a remote attacker to obtain sensitive 
information, caused by the failure to check the contents of the padding bytes
when using CBC cipher suites of some TLS implementations. A remote user with 
the ability to conduct a man-in-the-middle attack could exploit this 
vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) 
like attack to decrypt sensitive information and calculate the plaintext of 
secure connections.

CVSS Base Score: 4.3

CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/99216 for the 
current score

CVSS Environmental Score*: Undefined

CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

The vulnerable components are used when Rational DOORS is configured to use 
OSLC remote services and in internal communication between the Rational DOORS
client and server.

Rational DOORS		Status

9.3.x			Affected

9.4.x			Affected

9.5.x			Affected

9.6.x			Affected

Workarounds and Mitigations

Set an environment variable to avoid the vulnerability (clients and servers)

To avoid the vulnerability, you must set the environment variable 
GSK_STRICTCHECK_CBCPADBYTES to GSK_TRUE for all processes that will run 
Rational DOORS code.

Rational DOORS component						Setting the EV

Rational DOORS client, database server, interoperation server 		Set the	environment variable as a user or system environment variable.

You should verify applying this configuration change does not cause any 
compatibility issues.

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support 
alerts like this.

References

Complete CVSS Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 16 December 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.

- --------------------------END INCLUDED TEXT--------------------

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