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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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