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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1986
       Security Bulletin: POODLE vulnerability in SSLv3 affects IBM
                 CICS Transaction Gateway (CVE-2014-3566)
                              28 October 2014

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

Product:           IBM CICS Transaction Gateway
Publisher:         IBM
Operating System:  AIX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Access Confidential Data -- Remote with User Interaction
                   Reduced Security         -- Remote with User Interaction
Resolution:        Mitigation
CVE Names:         CVE-2014-3566  

Reference:         ASB-2014.0122
                   ESB-2014.1858

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21687697

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Security Bulletin: POODLE vulnerability in SSLv3 affects IBM CICS Transaction
Gateway (CVE-2014-3566)

Security Bulletin

Document information

More support for:

CICS Transaction Gateway

CTG

Software version:

8.0, 8.1, 9.0, 9.1

Operating system(s):

AIX, Linux, Solaris, Windows

Software edition:

All

Reference #:

1687697

Modified date:

2014-10-27

Summary

SSLv3 contains a vulnerability that has been referred to as the Padding Oracle
On Downgraded Legacy Encryption (POODLE) attack. Supported versions of CICS 
Transaction Gateway for Mutliplatforms and CICS Transaction Gateway for 
Desktop Edition are affected by POODLE.

Vulnerability Details

CVE ID: CVE-2014-3566

DESCRIPTION: IBM CICS Transaction Gateway could allow a remote attacker to 
obtain sensitive information, caused by a design error when using the SSLv3 
protocol. A remote user with the ability to conduct a man-in-the-middle attack
could exploit this vulnerability by using a POODLE (Padding Oracle On 
Downgraded Legacy Encryption) attack to decrypt SSL sessions and access the 
plaintext of encrypted connections.

CVSS Base Score: 4.3

CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/97013 for the 
current score

CVSS Environmental Score*: Undefined

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

Back level CICS TG provided JARs and resource adapters are allowed to connect
to CICS TG using SSLv3. All supported versions of the CICS TG provided JARs 
and resource adapters connect to CICS TG using TLS.

At CICS TG V9.1 the https listener will allow SSLv3 connections. This will be
resolved by a CICS TG APAR. This document will be updated with details when 
the fix is available.

Affected Products and Versions

Supported versions of CICS TG for Mutliplatforms and CICS TG Desktop Edition

Workarounds and Mitigations

Upgrade unsupported back-level CICS TG client applications to use supported 
versions of the CICS TG provided JARs or resource adapters.

Starting in CICS TG V9.0, TLSv1.2 connections can be required by specifying 
SP800-131A strict compliance using Java system property:

com.ibm.jsse2.sp800-131=strict

Specifying SP800-131A transition compliance requires TLSv1.0 connections:

com.ibm.jsse2.sp800-131=transition

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 Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

*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.

Product Alias/Synonym

CICSTG CTG CICS TG

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