21 May 2014
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== 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) 18.104.22.168 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) 22.214.171.124 HP-UX (PA-RISC_32, PA-RISC_64) Informix Client SDK 3.50 126.96.36.199 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 188.8.131.52 or 184.108.40.206. Windows GSkit version 7 x86_32 instructions: Copy/download the gsk7d_220.127.116.11_win32.exe file to C:\tmp. Start the 'cmd' program. Change to the C:\temp directory (cd c:\tmp). Run "gsk7d_18.104.22.168_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 22.214.171.124. All other Windows versions instructions: Copy/download the appropriate file (gsk7d_126.96.36.199_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 188.8.131.52 or 184.108.40.206. 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." 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