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AUSCERT External Security Bulletin Redistribution
Security Bulletin: TLS padding vulnerability affects IBM
Rational DOORS (CVE-2014-8730)
18 December 2014
AusCERT Security Bulletin Summary
Product: IBM Rational DOORS
Operating System: Windows
Impact/Access: Access Privileged Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
CVE Names: CVE-2014-8730
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Security Bulletin: TLS padding vulnerability affects IBM Rational DOORS
More support for:
9.3, 9.4, 9.5, 9.6
Transport Layer Security (TLS) padding vulnerability via a POODLE (Padding
Oracle On Downgraded Legacy Encryption) like attack affects IBM Rational
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
CVSS Base Score: 4.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/99216 for the
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
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
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Complete CVSS Guide
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IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
* 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.
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.
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