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IBM SECURITY ADVISORY

First Issued: Fri Jul 13 13:28:29 CDT 2012

The most recent version of this document is available here:
| Updated: Thu Oct 25 05:15:16 CDT 2012
| Update: New ifixes for the latest SP’s
| Update: Corrected file name

http://aix.software.ibm.com/aix/efixes/security/bind9_advisory4.asc

                       VULNERABILITY SUMMARY

VULNERABILITY: Vulnerability in AIX bind

PLATFORMS: AIX 5.3 Service Extension, 6.1, and 7.1 releases

SOLUTION: Apply the fix as described below

THREAT: A remote attacker can cause denial of service

CVE Number: CVE-2012-1667

Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO

                       DETAILED INFORMATION

I. DESCRIPTION

Adding records to BIND with zero length rdata fields could
result in memory disclosure to client, data corruption
or system crash

II. CVSS

CVSS Base Score: 5
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/76034 for the
current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

III. PLATFORM VULNERABILITY ASSESSMENT

Note: To use the following commands on VIOS you must first
execute:

oem_setup_env

To determine if your system is vulnerable, execute the following
command:

lslpp -L bos.net.tcp.client

The following fileset levels are vulnerable:

AIX Fileset        Lower Level       Upper Level
------------------------------------------------
bos.net.tcp.client  5.3.12.0          5.3.12.7
bos.net.tcp.server  5.3.12.0          5.3.12.4

| bos.net.tcp.client 6.1.6.0 6.1.6.20
| bos.net.tcp.server 6.1.6.0 6.1.6.19
bos.net.tcp.client 6.1.7.0 6.1.7.16
bos.net.tcp.server 6.1.7.0 6.1.7.16
| bos.net.tcp.client 7.1.0.0 7.1.0.21
| bos.net.tcp.server 7.1.0.0 7.1.0.19
bos.net.tcp.client 7.1.1.0 7.1.1.16
bos.net.tcp.server 7.1.1.0 7.1.1.16

IV. SOLUTIONS

A. APARS

    IBM has assigned the following APARs to this problem:

    AIX Level           APAR number        Availability
    ---------------------------------------------------
    5.3.12              IV22625            01/04/13 sp7
    6.1.6               IV22554            12/12/12 sp10
    6.1.7               IV22555            12/12/12 sp6
    7.1.0               IV22556            12/12/12 sp8
    7.1.1               IV22557            12/12/12 sp6

    Subscribe to the APARs here:

    http://www.ibm.com/support/docview.wss?uid=isg1IV22625
    http://www.ibm.com/support/docview.wss?uid=isg1IV22554
    http://www.ibm.com/support/docview.wss?uid=isg1IV22555
    http://www.ibm.com/support/docview.wss?uid=isg1IV22556
    http://www.ibm.com/support/docview.wss?uid=isg1IV22557

    By subscribing, you will receive periodic email alerting you
    to the status of the APAR, and a link to download the fix once
    it becomes available.

B. FIXES

    Fixes are available.  The fixes can be downloaded via ftp
    from:

    ftp://aix.software.ibm.com/aix/efixes/security/bind9_fix4.tar

    The link above is to a tar file containing this signed
    advisory, fix packages, and PGP signatures for each package.
    The fixes below include prerequisite checking. This will
    enforce the correct mapping between the fixes and AIX
    Technology Levels.

    AIX Level                     Interim Fix (*.Z)
    -------------------------------------------------------------------

| 5.3.12.6 IV22625m06.120713.epkg.Z
6.1.6.8 IV22554m07.120713.epkg.Z
| 6.1.6.9 IV22554s09.121004.epkg.Z
6.1.7.4 IV22555m04.120713.epkg.Z
| 6.1.7.5 IV22555m05.121012.epkg.Z
7.1.0.6 IV22556m05.120711.epkg.Z
| 7.1.0.7 IV22556s07.121004.epkg.Z
7.1.1.4 IV22557m04.120713.epkg.Z
| 7.1.1.5 IV22557m05.121012.epkg.Z

    VIOS Level                    Interim Fix (*.Z)
    -------------------------------------------------------------------
    2.2.1.4-FP-25 SP-02           IV22555m04.120713.epkg.Z

    To extract the fixes from the tar file:

    tar xvf bind9_fix4.tar
    cd bind9_fix4

    Verify you have retrieved the fixes intact:

    The checksums below were generated using the
    "csum -h SHA1" (sha1sum) command is the followng:

    csum -h SHA1 (sha1sum)                    filename
    ------------------------------------------------------------------
    00ca9d1246cc1539d4fbfb7500f6318d471d4c83  IV22625m06.120713.epkg.Z
    cc1e07a12b40c0b3eb47cf4913769d8f026ca2fe  IV22554m07.120713.epkg.Z

| 5f6a4f4aa6c527f1d2dd43be9f955789156d0d7b IV22554s09.121004.epkg.Z
c663fb1885dbe8efb4a6ccef93d4729f0dd27cb8 IV22555m04.120713.epkg.Z
| 4a9677e68b11ebdad531e69de1c1c61d8b623867 IV22555m05.121012.epkg.Z
4dd1fb14f39f5fe1be1eecf35af6556b2b3ea560 IV22556m05.120711.epkg.Z
| 70f070dc7f3905ea4295877891c86f63edf0eb42 IV22556s07.121004.epkg.Z
2d7145be2ffdc0254d5ee16e9e45fd9aa3af9681 IV22557m04.120713.epkg.Z
| af7c2db69717995377c1961ec1265395275c505a IV22557m05.121012.epkg.Z

    To verify the sum, use the text of this advisory as input to sha1sum.
    For example:

    csum -h SHA1 -i Advisory.asc
    sha1sum -c Advisory.asc

    These sums should match exactly. The PGP signatures in the tar
    file and on this advisory can also be used to verify the
    integrity of the fixes.  If the sums or signatures cannot be
    confirmed, contact IBM AIX Security at
    [email protected] and describe the discrepancy.

 C. FIX AND INTERIM FIX INSTALLATION

    IMPORTANT: If possible, it is recommended that a mksysb backup
    of the system be created.  Verify it is both bootable and
    readable before proceeding.

    To preview a fix installation:

    installp -a -d fix_name -p all  # where fix_name is the name of the
                                    # fix package being previewed.
    To install a fix package:

    installp -a -d fix_name -X all  # where fix_name is the name of the
                                    # fix package being installed.

    Interim fixes have had limited functional and regression
    testing but not the full regression testing that takes place
    for Service Packs; however, IBM does fully support them.

    Interim fix management documentation can be found at:

    http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html

    To preview an interim fix installation:

    emgr -e ipkg_name -p         # where ipkg_name is the name of the
                                 # interim fix package being previewed.

    To install an interim fix package:

    emgr -e ipkg_name -X         # where ipkg_name is the name of the
                                 # interim fix package being installed.

V. WORKAROUNDS

None

VI. OBTAINING FIXES

AIX security fixes can be downloaded from:

    ftp://aix.software.ibm.com/aix/efixes/security

AIX fixes can be downloaded from:

    http://www.ibm.com/eserver/support/fixes/fixcentral/main/pseries/aix

NOTE: Affected customers are urged to upgrade to the latest
applicable Technology Level and Service Pack.

VII. CONTACT INFORMATION

If you would like to receive AIX Security Advisories via email,
please visit:

    http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd

Comments regarding the content of this announcement can be
directed to:

    [email protected]

To request the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:

    A. Send an email with "get key" in the subject line to:

        [email protected]

    B. Download the key from a PGP Public Key Server. The key ID is:

        0x28BFAA12

Please contact your local IBM AIX support center for any
assistance.

eServer is a trademark of International Business Machines
Corporation.  IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation.  All other trademarks
are property of their respective holders.

VIII. REFERENCES:

Complete CVSS Guide: http://www.first.org/cvss/cvss-guide.html
On-line Calculator V2: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/76034
CVE-2012-1667: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1667

*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 Flash.

Note: 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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