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AUSCERT External Security Bulletin Redistribution
ESB-2015.0728
Security Bulletin: Vulnerabilities in GSKit affect Rational
Developer for System z (CVE-2015-0138)
25 March 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Rational Developer for System z
Publisher: IBM
Operating System: AIX
Linux variants
Windows
z/OS
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0138
Reference: ESB-2015.0723
ESB-2015.0714
ESB-2015.0644
ESB-2015.0542
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21699151
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Security Bulletin: Vulnerabilities in GSKit affect Rational Developer for
System z (CVE-2015-0138)
Security Bulletin
Document information
More support for:
Rational Developer for System z
Software version:
9.0, 9.0.1, 9.0.1.1, 9.0.1.2, 9.0.1.3, 9.1, 9.1.1
Operating system(s):
AIX, Linux, Windows, z/OS
Software edition:
All Editions
Reference #:
1699151
Modified date:
2015-03-20
Summary
GSKit is an IBM component that is used by IBM Rational Developer for System
z. The GSKit that is shipped with Rational Developer for System z contains
multiple security vulnerabilities including the “FREAK: Factoring Attack on
RSA-EXPORT keys" TLS/SSL client and server vulnerability. Rational Developer
for System z has addressed the applicable CVEs.
Vulnerability Details
CVEID: CVE-2015-0138
DESCRIPTION: A vulnerability in various IBM SSL/TLS implementations could
allow a remote attacker to downgrade the security of certain SSL/TLS
connections. An IBM SSL/TLS client implementation could accept the use of an
RSA temporary key in a non-export RSA key exchange ciphersuite. This could
allow a remote attacker using man-in-the-middle techniques to facilitate
brute-force decryption of TLS/SSL traffic between vulnerable clients and
servers.
This vulnerability is also known as the FREAK attack.
CVSS Base Score: 4.3
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/#/vulnerabilities/100691
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Affected Products and Versions
Principal Product and Version(s)
Rational Developer for System z, versions 9.0.x and 9.1.x
Remediation/Fixes
Upgrade to one of the following releases:
Rational Developer for System z Interim Fix 1 for 9.0.1.3
Rational Developer for System z Interim Fix 2 for 9.1.1.0
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
Subscribe to My Notifications to be notified of important product support
alerts like this.
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.
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