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AUSCERT External Security Bulletin Redistribution
ESB-2016.0233
Security Bulletin: Vulnerabilities in GSKit affect Rational Developer for
System z (CVE-2015-7421, CVE-2015-7420)
29 January 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Rational Developer
Publisher: IBM
Operating System: AIX
Linux variants
Windows
z/OS
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-7421 CVE-2015-7420
Reference: ESB-2016.0215
ESB-2015.3017
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21975050
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Security Bulletin: Vulnerabilities in GSKit affect Rational Developer for
System z (CVE-2015-7421, CVE-2015-7420)
Security Bulletin
Document information
More support for:
Rational Developer for System z
General Information
Software version:
9.0, 9.0.0.1, 9.0.1, 9.0.1.1, 9.0.1.2, 9.0.1.3, 9.0.1.4, 9.1, 9.1.1, 9.1.1.1,
9.1.1.2, 9.5, 9.5.1
Operating system(s):
AIX, Linux, Windows, z/OS
Software edition:
All Editions
Reference #:
1975050
Modified date:
2016-01-27
Summary
Vulnerabilities were discovered in GSKit. Rational Developer for System z uses
GSKit and addressed the applicable CVE.
Vulnerability Details
CVEID: CVE-2015-7421
DESCRIPTION: A vulnerability in GSKit could allow a remote attacker to obtain
sensitive information. The internal ICC PRNG pool state is duplicated during a
fork() system call operation which results in a period of time where child
processes may generate identical PRNG output to the parent. This may allow
possible attacks related to predicable state which an attacker could exploit.
CVSS Base Score: 3.7
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/107695 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N) CVEID:
CVE-2015-7420
DESCRIPTION: A vulnerability in GSKit could allow a remote attacker to obtain
sensitive information. The GSKit PRNG state is duplicated during a fork()
system call operation which results in a period of time where child processes
may generate identical PRNG output to the parent.
CVSS Base Score: 3.7
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/107694 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
Principal Product and Version(s)
Rational Developer for System z, versions 9.0.1.4 and earlier
Rational Developer for System z, versions 9.1.1.2 and earlier
Rational Developer for z Systems, versions 9.5.1 and earlier
Remediation/Fixes
IBM has provided patches for all affected versions.
Follow the installation instructions in the README files included with the
patch.
The fix can be obtained at the following locations:
Rational Developer for System z Interim Fix 3 for 9.0.1.4
Rational Developer for System z Interim Fix 2 for 9.1.1.2
Rational Developer for z Systems Interim Fix 2 for 9.5.1
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 v2 Guide
On-line Calculator v2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
* 26 January 2016: 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.
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