IBM SECURITY ADVISORY

First Issued: Tue Jul 16 10:46:04 CDT 2013

The most recent version of this document is available here:
| Updated: Mon Oct 14 20:02:42 CDT 2013
| Update: Includes VIOS in Vulnerability Summary
| Updated: Thu Dec 12 12:55:11 CST 2013
| Update: 1. Added KEYs for parsing purposes
| 2. Moved to OpenSSL signature

http://aix.software.ibm.com/aix/efixes/security/infiniband_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/infiniband_advisory.asc

                       VULNERABILITY SUMMARY

VULNERABILITY: Security Vulnerabilities in AIX InfiniBand

PLATFORMS: AIX 6.1 and 7.1 releases
| VIOS 2.X

SOLUTION: Apply the fix as described below

THREAT: A local attacker could gain lateral or elevated privileges

CVE Number: CVE-2013-4011 CVSS=7.2

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

                       DETAILED INFORMATION

I. DESCRIPTION

Both "ibstat" and .arp.ib. commands have security vulnerabilities that
can allow a non-privileged user to run malicious code with privileged
authority.

II. CVSS

CVSS Base Score: 7.2 
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/85617 for the
current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:L/AC:L/Au:N/C:C/I:C/A:C)

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 devices.common.IBM.ib.rte

The following fileset levels are vulnerable:

AIX Fileset               Lower Level       Upper Level   KEY
----------------------------------------------------------------
devices.common.IBM.ib.rte  6.1.6.0           6.1.6.21     key_w_fs
devices.common.IBM.ib.rte  6.1.7.0           6.1.7.18     key_w_fs
devices.common.IBM.ib.rte  6.1.8.0           6.1.8.15     key_w_fs
devices.common.IBM.ib.rte  7.1.0.0           7.1.0.21     key_w_fs
devices.common.IBM.ib.rte  7.1.1.0           7.1.1.18     key_w_fs
devices.common.IBM.ib.rte  7.1.2.0           7.1.2.15     key_w_fs

IV. SOLUTIONS

A. APARS

    IBM has assigned the following APARs to this problem:

    AIX Level           APAR number        Availability    KEY
    -------------------------------------------------------------
    6.1.6               IV43582            08/16/13 SP12   key_w_apar
    6.1.7               IV43827            08/16/13 SP8    key_w_apar
    6.1.8               IV43580            08/16/13 SP3    key_w_apar
    7.1.0               IV43562            08/16/13 SP10   key_w_apar
    7.1.1               IV43756            08/16/13 SP8    key_w_apar
    7.1.2               IV43561            08/16/13 SP3    key_w_apar

    Subscribe to the APARs here:

    http://www.ibm.com/support/docview.wss?uid=isg1IV43582
    http://www.ibm.com/support/docview.wss?uid=isg1IV43827
    http://www.ibm.com/support/docview.wss?uid=isg1IV43580
    http://www.ibm.com/support/docview.wss?uid=isg1IV43562
    http://www.ibm.com/support/docview.wss?uid=isg1IV43756
    http://www.ibm.com/support/docview.wss?uid=isg1IV43561

    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/infiniband_fix.tar

    The link above is to a tar file containing this signed
    advisory, fix packages, and OpenSSL 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)          KEY
    -------------------------------------------------------------------
    6.1.6.11                      iv43582mBa.130626.epkg.Z   key_w_fix
    6.1.7.7                       iv43827m7a.130614.epkg.Z   key_w_fix
    6.1.8.2                       iv43580m2a.130619.epkg.Z   key_w_fix
    7.1.0.9                       iv43562m9.130626.epkg.Z    key_w_fix
    7.1.1.7                       iv43756m7a.130612.epkg.Z   key_w_fix
    7.1.2.2                       iv43561m2a.130626.epkg.Z   key_w_fix

    VIOS Level                    Interim Fix (*.Z)
    -------------------------------------------------------------------
    2.2.2.2-FP-26 SP-02           iv43580m2a.130619.epkg.Z

    To extract the fixes from the tar file:

    tar xvf infiniband_fix.tar
    cd infiniband_fix

    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
    ------------------------------------------------------------------
    0222cd18e3316f3d73f6d5150d4d672347427bb4  iv43582mBa.130626.epkg.Z
    9a274ef45ecad62e20720cca84ea69f4eaaba78e  iv43827m7a.130614.epkg.Z
    50b92bdb5156b55f245f4ffacfae113dd65326fe  iv43580m2a.130619.epkg.Z
    89e393e74b1d3c49d2735773ca49337e9bfcd1f1  iv43562m9.130626.epkg.Z
    d9b39fa210731957fdd72c003aa6b53cecc8af35  iv43756m7a.130612.epkg.Z
    622f1676ae6cb5b00f4131fad4774014ab160d2a  iv43561m2a.130626.epkg.Z
    50b92bdb5156b55f245f4ffacfae113dd65326fe  iv43580m2a.130619.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 OpenSSl 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.

    openssl dgst -sha1 -verify AIX_PSIRT_pub.asc -signature file.asc.sig file.asc

 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

Select one of the following:

1) Enabling PowerSC with DoD.xml profile will prevent this vulnerability.

2) Running aixpert with high-level security options (aixpert -l high)

3) Running aixpert with medium-level security options (aixpert -l medium)

4) Invoking fpm -l high to remove setuid and setgid permissions for high
   level security.

5) Invoking fpm -l medium to remove setuid and setgid permissions that fall 
   into medium level security.

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/onvdq

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

    [email protected]

To obtain the OpenSSL public key that can be used to verify the
signed advisories and ifixes:

    Download the key from our web page:

    http://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt

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:

Note: Keywords labeled as KEY in this document are used for parsing purposes.

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/85617
CVE-2013-4011: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4011

*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.