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CentOS ProjectBELLMAIL_ADVISORY.ASC

HistoryDec 15, 2016 - 3:12 p.m.

Vulnerability in bellmail affects AIX,Vulnerability in bellmail affects VIOS

2016-12-1515:12:23

CentOS Project

aix.software.ibm.com

588

7.2 High

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

0.0004 Low

EPSS

Percentile

13.2%

JSON

IBM SECURITY ADVISORY

First Issued: Thu Dec 15 15:12:23 CST 2016

The most recent version of this document is available here:

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

Security Bulletin: Vulnerability in bellmail affects AIX (CVE-2016-8972)

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

SUMMARY:

There is a vulnerability in bellmail that impacts AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2016-8972
https://vulners.com/cve/CVE-2016-8972
https://vulners.com/cve/CVE-2016-8972
DESCRIPTION: IBM AIX could allow a local user to gain root privileges using
   a specially crafted command within the bellmail client.
CVSS Base Score: 8.4
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/118863 for more
    information.
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)


AFFECTED PRODUCTS AND VERSIONS:

    AIX  6.1, 7.1, 7.2
    VIOS 2.2.x
   
    The following fileset levels are vulnerable:
    
    key_fileset = aix
    
    Fileset                Lower Level  Upper Level KEY
    ---------------------------------------------------------
    bos.net.tcp.client       6.1.9.0      6.1.9.200   key_w_fs
    bos.net.tcp.client       7.1.3.0      7.1.3.47    key_w_fs
    bos.net.tcp.client       7.1.4.0      7.1.4.30    key_w_fs
    bos.net.tcp.client_core  7.2.0.0      7.2.0.1     key_w_fs
    bos.net.tcp.client_core  7.2.1.0      7.2.1.0     key_w_fs

    Note:  To find out whether the affected filesets are installed 
    on your systems, refer to the lslpp command found in AIX user's guide.

    Example:  lslpp -L | grep -i bos.net.tcp.client


REMEDIATION:

    A. APARS
        
        IBM has assigned the following APARs to this problem:

        AIX Level APAR     Availability  SP   KEY
        ------------------------------------------------
        6.1.9     IV91006  4/28/17      SP9  key_w_apar
        7.1.3     IV91007  6/30/17      SP9  key_w_apar
        7.1.4     IV91008  4/28/17      SP4  key_w_apar
        7.2.0     IV91010  6/30/17      SP4  key_w_apar
        7.2.1     IV91011  4/28/17      SP2  key_w_apar

        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV91006
        http://www.ibm.com/support/docview.wss?uid=isg1IV91007
        http://www.ibm.com/support/docview.wss?uid=isg1IV91008
        http://www.ibm.com/support/docview.wss?uid=isg1IV91010
        http://www.ibm.com/support/docview.wss?uid=isg1IV91011


        https://www.ibm.com/support/docview.wss?uid=isg1IV91006
        https://www.ibm.com/support/docview.wss?uid=isg1IV91007
        https://www.ibm.com/support/docview.wss?uid=isg1IV91008
        https://www.ibm.com/support/docview.wss?uid=isg1IV91010
        https://www.ibm.com/support/docview.wss?uid=isg1IV91011

        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. A system reboot is recommended after
        installing the iFixes.

        The fixes can be downloaded via ftp or http from:

        ftp://aix.software.ibm.com/aix/efixes/security/bellmail_fix.tar
        http://aix.software.ibm.com/aix/efixes/security/bellmail_fix.tar
        https://aix.software.ibm.com/aix/efixes/security/bellmail_fix.tar 

        The links above are 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
        ----------------------------------------------
        6.1.9.6    IV91006s8a.161125.epkg.Z  key_w_fix
        6.1.9.7    IV91006s8a.161125.epkg.Z  key_w_fix
        6.1.9.8    IV91006s8a.161125.epkg.Z  key_w_fix
        7.1.3.5    IV91007s7a.161125.epkg.Z  key_w_fix
        7.1.3.6    IV91007s7a.161125.epkg.Z  key_w_fix 
        7.1.3.7    IV91007s7a.161125.epkg.Z  key_w_fix
        7.1.4.1    IV91008s3a.161125.epkg.Z  key_w_fix
        7.1.4.2    IV91008s3a.161125.epkg.Z  key_w_fix
        7.1.4.3    IV91008s3a.161125.epkg.Z  key_w_fix
        7.2.0.0    IV91010s2a.161125.epkg.Z  key_w_fix
        7.2.0.1    IV91010s2a.161125.epkg.Z  key_w_fix
        7.2.0.2    IV91010s2a.161125.epkg.Z  key_w_fix
        7.2.1.0    IV91011s1a.161125.epkg.Z  key_w_fix
        7.2.1.1    IV91011s1a.161125.epkg.Z  key_w_fix

        VIOS Level  Interim Fix (*.Z)         KEY
        -----------------------------------------------
        2.2.3.x    IV91006s8a.161125.epkg.Z  key_w_fix
        2.2.4.x    IV91006s8a.161125.epkg.Z  key_w_fix
        2.2.5.x    IV91006s8a.161125.epkg.Z  key_w_fix


        Please note that the above table refers to AIX TL/SP level as
        opposed to fileset level, i.e., 7.1.4.1 is AIX 7100-04-01.

        To extract the fixes from the tar file:

        tar xvf bellmail_fix.tar
        cd bellmail_fix

        Verify you have retrieved the fixes intact:

        The checksums below were generated using the
        "openssl dgst -sha256 &lt;filename&gt;” command as the following:

        openssl dgst -sha256                                              filename                 KEY
        -----------------------------------------------------------------------------------------------------
        a70228565213804918e890f90dd63f43f46bd0f057a214c504efc32b2294feb9  IV91006s8a.161125.epkg.Z key_w_csum
        b52b3bb1950ae58efe1c2c1c3e691bab21a6823cc8c732dde373024b4e6a7fdc  IV91007s7a.161125.epkg.Z key_w_csum
        cfacfdff0bcc211368afc746851f2d36f8d071b758d1b8c419d844255dee5442  IV91008s3a.161125.epkg.Z key_w_csum
        d23f90920fedf449706685b8fa2659dcc93715448e3be29abbd6a3b7a38e8232  IV91010s2a.161125.epkg.Z key_w_csum
        80bc674128c8ad49616259335277a86acc29dac9d30fd0222c997522d7a00fe4  IV91011s1a.161125.epkg.Z key_w_csum
        
        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 &lt;pubkey_file&gt; -signature &lt;advisory_file&gt;.sig &lt;advisory_file&gt;

        openssl dgst -sha1 -verify &lt;pubkey_file&gt; -signature &lt;ifix_file&gt;.sig &lt;ifix_file&gt;

        Published advisory OpenSSL signature file location:

        http://aix.software.ibm.com/aix/efixes/security/bellmail_advisory.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/bellmail_advisory.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/bellmail_advisory.asc.sig 

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

        To preview an interim fix installation:

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

        To install an interim fix package:

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

WORKAROUNDS AND MITIGATIONS:

    None.

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

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

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

    http://www.ibm.com/support/mynotifications
    https://www.ibm.com/support/mynotifications

To view previously issued advisories, please visit:

    http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
    https://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
https://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt

To obtain the PGP public key that can be used to communicate
securely with the AIX Security Team via [email protected] you
can either:

    A. Download the key from our web page:

http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgppubkey.txt
https://www.ibm.com/systems/resources/systems_p_os_aix_security_pgppubkey.txt

    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.

REFERENCES:

Complete CVSS v3 Guide:  http://www.first.org/cvss/user-guide
    https://www.first.org/cvss/user-guide
On-line Calculator v3:
    http://www.first.org/cvss/calculator/3.0
    https://www.first.org/cvss/calculator/3.0

ACKNOWLEDGEMENTS:

Vulnerability research and notification provided by Rhino Security Labs.

CHANGE HISTORY:

First Issued: Thu Dec 15 15:12:23 CST 2016

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

*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.