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ESB-2014.0782 - [Win][Linux][HP-UX][Solaris][AIX][OSX] IBM Informix Client: Denial of service - Remote/unauthenticated

Date: 21 May 2014
References: ESB-2014.0679  ESB-2014.0714  ESB-2014.0764  ESB-2014.0783  ESB-2014.0815  ESB-2014.0819  ESB-2014.0821  ESB-2014.0838  ESB-2014.0878  ESB-2014.0880  


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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0782
Security Bulletin: IBM Informix Client SDK CPU utilization (CVE-2014-0963)
                                21 May 2014

===========================================================================

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

Product:           IBM Informix Client
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-2014.0764
                   ESB-2014.0714
                   ESB-2014.0679

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21673018

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: IBM Informix Client SDK CPU utilization (CVE-2014-0963)

Security Bulletin

Document information

More support for:
Informix Tools
Informix Client Software Development Kit (CSDK)

Software version:
3.5, 3.7, 4.1

Operating system(s):
AIX, HP-UX, Linux, Mac OS X, Solaris, Windows

Reference #:
1673018

Modified date:
2014-05-14

Summary

Informix Client SDK 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 Client SDK 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 Client SDK 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 Client SDK 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

CSDK 3.50, 3.70 and 4.10

Remediation/Fixes

Product				Remediation/First Fix
Informix Client SDK 4.10	Upgrade to 4.10.xC4 or download and install
				GSKit (see next section)
Informix Client SDK 3.70	Upgrade to 3.70.xC9 or download and install
				GSKit (see next section)
Informix Client SDK 3.50	Upgrade and install GSKit (see next section)

Upgrading GSKit:

    Download the appropriate GSKit using the following table:
    Product	Required GSKit version	GSKit link
    Informix Client SDK 4.10

    Informix Client SDK 3.70 (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 Client SDK 3.70 (HP-UX PA-RISC platforms only)	7.0.4.50
    HP-UX (PA-RISC_32, PA-RISC_64)
    Informix Client SDK 3.50	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.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
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===========================================================================
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