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AUSCERT External Security Bulletin Redistribution
ESB-2014.0764
Security Bulletin: IBM Informix Server CPU utilization (CVE-2014-0963)
20 May 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Informix
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
OS X
Solaris
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-0963
Reference: ESB-2014.0714
ESB-2014.0679
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21673008
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Security Bulletin: IBM Informix Server CPU utilization (CVE-2014-0963)
Security Bulletin
Document information
More support for:
Informix Servers
Software version:
11.5, 11.7, 12.1
Operating system(s):
AIX, HP-UX, Linux, Mac OS X, Solaris, Windows
Reference #:
1673008
Modified date:
2014-05-14
Summary
Informix Server is affected by a problem related to the SSL implementation
which, under very specific conditions, can cause CPU utilization to
rapidly increase.
Vulnerability Details
CVE ID: CVE-2014-0963
DESCRIPTION:
Informix Server is affected by a problem with the handling of certain
SSL messages. The TLS implementation can, under very specific conditions,
cause CPU utilization to rapidly increase. The situation occurs only in a
certain error case that causes a single thread to begin looping. If this
happens multiple times, more threads will begin to loop and an increase
in CPU utilization will be seen. This increase could ultimately result
in CPU exhaustion and unresponsiveness of the Informix Server and other
software running on the affected system.
This issue can affect the availability of the system, but does not impact
system confidentiality or integrity. This vulnerability can be remotely
exploited, authentication is not required and the exploit is moderately
complex.
To determine if your systems are being affected by this issue, you can
monitor the CPU utilization for Informix Server instances.
CVSS Base Score: 7.1
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92844 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C)
Affected Products and Versions
Informix Server 11.50, 11.70 and 12.10
Remediation/Fixes
Product Remediation/First Fix
Informix Server 12.10 Upgrade to 12.10.xC4 or download and install GSKit
(see next section)
Informix Server 11.70 Upgrade to future release or download and install
GSKit (see next section)
Informix Server 11.50 Upgrade and install GSKit (see next section)
Upgrading GSKit:
Download the appropriate GSKit using the following table:
Product Required GSKit version GSKit link
Informix Server 12.10
Informix Server 11.70 (all platforms other than HP-UX PA-RISC)
8.0.50.20 AIX (pSeries_32, pSeries_64)
HP-UX (Itanium_32, Itanium_64)
Linux (x86_32, x86_64, pSeries_64, zSeries_32, zSeries_64)
Solaris (SPARC_32, SPARC_64, x86_32, x86_64)
Windows (x86_32, x86_64)
Informix Server 11.70 (HP-UX PA-RISC platforms only) 7.0.4.50
HP-UX (PA-RISC_32, PA-RISC_64)
Informix Server 11.50 7.0.4.50 AIX (pSeries_32, pSeries_64)
HP-UX (Itanium_32, Itanium_64, PA-RISC_32, PA-RISC_64)
Linux (x86_32, x86_64, pSeries_64, zSeries_32, zSeries_64)
Solaris (SPARC_32, SPARC_64, x86_32, x86_64)
Windows (x86_32, x86_64)
Unix/Linux instructions:
Copy the downloaded tar file(s) to $INFORMIXDIR/gskit. Note: the
old gskit .tar files must be removed or renamed to not end in .tar.
Bring the database server offline. (e.g. onmode -ky).
Change to the GSKit directory (cd $INFORMIXDIR/gskit).
As root, run "./installgskit".
To verify the installation, run the appropriate command
(i.e. gsk7ver, gsk7ver_64, gsk8ver or gsk8ver_64) for the GSKit
you installed. The new version should be 7.0.4.50 or 8.0.50.20.
Windows GSkit version 7 x86_32 instructions:
Copy/download the gsk7d_7.0.4.50_win32.exe file to C:\tmp.
Start the 'cmd' program.
Change to the C:\temp directory (cd c:\tmp).
Run "gsk7d_7.0.4.50_win32.exe /D tmp". This will extract the files
to the C:\tmp\tmp directory.
Change to the C:\tmp\tmp directory (cd C:\tmp\tmp).
Run "setup GSK7BAS". Accept all of the defaults.
To verify the installation, run gsk7ver to verify the
installation. The new version should be 7.0.4.50.
All other Windows versions instructions:
Copy/download the appropriate file (gsk7d_7.0.4.50_win64.msi,
gsk8ssl32.exe or gsk8ssl64.exe) to C:\tmp.
Using Windows Explorer, double click on the downloaded file. This
will start Install Shield. Accept all of the defaults.
To verify the installation, run the appropriate command
(i.e. gsk7ver_64, gsk8ver or gsk8ver_64) for the GSKit you
installed. The new version should be 7.0.4.50 or 8.0.50.20.
Workarounds and Mitigations
Monitor CPU utilization of your Program Name instances. If utilization
becomes abnormally high, stop and restart the affected instance.
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
Change History
14 May 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.
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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