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CentOS ProjectBIND_ADVISORY14.ASC

HistoryDec 15, 2016 - 10:06 p.m.

There are two vulnerabilities in BIND that impact AIX.,Vulnerabilities in BIND impact AIX

2016-12-1522:06:41

CentOS Project

aix.software.ibm.com

564

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.951 High

EPSS

Percentile

99.3%

JSON

IBM SECURITY ADVISORY

First Issued: Thu Dec 15 22:06:41 CST 2016
|Updated: Thu Dec 29 12:28:16 CST 2016
|Update: New iFixes provided for AIX 5.3.12.9, 6.1.9.6, 6.1.9.8,
|7.1.4.1, 7.1.4.3, 7.2.0.0, 7.2.0.1, 7.2.0.2, 7.2.1.0, 7.2.1.1
|Updated: Wed Feb 8 16:52:50 CST 2017
|Update: New iFix provided for AIX 7.1.3.7

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/bind_advisory14.asc
https://aix.software.ibm.com/aix/efixes/security/bind_advisory14.asc
ftp://aix.software.ibm.com/aix/efixes/security/bind_advisory14.asc

Security Bulletin: Vulnerabilities in BIND impact AIX (CVE-2016-8864 and
CVE-2016-2848)

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

SUMMARY:

There are two vulnerabilities in BIND that impact AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2016-8864 
https://vulners.com/cve/CVE-2016-8864
https://vulners.com/cve/CVE-2016-8864
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by the
improper handling of responses containing a DNAME answer in db.c or
resolver.c. By sending a recursive response, a remote attacker could 
exploit this vulnerability to trigger an assertion failure.
CVSS Base Score: 7.5 
CVSS Temporal Score: See 
    https://exchange.xforce.ibmcloud.com/vulnerabilities/118526 for the
    current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H))

CVEID: CVE-2016-2848
https://vulners.com/cve/CVE-2016-2848
https://vulners.com/cve/CVE-2016-2848
DESCRIPTION: ISC BIND is vulnerable to a denial of service. By sending a
specially crafted DNS packet with malformed options, a remote attacker could 
exploit this vulnerability to trigger an assertion failure.  
CVSS Base Score: 7.5
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/118228 for the
    current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)


AFFECTED PRODUCTS AND VERSIONS:

    AIX  5.3, 6.1, 7.1, 7.2
    
    The following fileset levels are vulnerable:
    
    key_fileset = aix

    Fileset                    Lower Level  Upper Level KEY 
    ------------------------------------------------------------
|   bos.net.tcp.client         5.3.12.0     5.3.12.10   key_w_fs
    bos.net.tcp.client         6.1.9.0      6.1.9.200   key_w_fs
    bos.net.tcp.client         7.1.3.0      7.1.3.48    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      7.2.0.2     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
        ------------------------------------------------
|       5.3.12    IV91253   N/A          N/A  key_w_apar
        6.1.9     IV91254  4/28/17       SP9  key_w_apar
        7.1.3     IV91214  6/30/17       SP9  key_w_apar
        7.1.4     IV91255  4/28/17       SP4  key_w_apar
|       7.2.0     IV91256  6/30/17       SP4  key_w_apar
|       7.2.1     IV91257  4/28/17       SP2  key_w_apar


        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV91254
        http://www.ibm.com/support/docview.wss?uid=isg1IV91214
        http://www.ibm.com/support/docview.wss?uid=isg1IV91255
        http://www.ibm.com/support/docview.wss?uid=isg1IV91253
        http://www.ibm.com/support/docview.wss?uid=isg1IV91256
        http://www.ibm.com/support/docview.wss?uid=isg1IV91257

        https://www.ibm.com/support/docview.wss?uid=isg1IV91254
        https://www.ibm.com/support/docview.wss?uid=isg1IV91214
        https://www.ibm.com/support/docview.wss?uid=isg1IV91255
        https://www.ibm.com/support/docview.wss?uid=isg1IV91253
        https://www.ibm.com/support/docview.wss?uid=isg1IV91256
        https://www.ibm.com/support/docview.wss?uid=isg1IV91257

        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 or http from:

        ftp://aix.software.ibm.com/aix/efixes/security/bind_fix14.tar
        http://aix.software.ibm.com/aix/efixes/security/bind_fix14.tar
        https://aix.software.ibm.com/aix/efixes/security/bind_fix14.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
        ----------------------------------------------
  |     5.3.12.9   IV91253m9b.161209.epkg.Z  key_w_fix
  |     6.1.9.6    IV91254m6b.161213.epkg.Z  key_w_fix
        6.1.9.7    IV91254m7b.161209.epkg.Z  key_w_fix
  |     6.1.9.8    IV91254m8b.161209.epkg.z  key_w_fix
        7.1.3.4    IV91214m4b.161209.epkg.Z  key_w_fix
        7.1.3.5    IV91214m5b.161209.epkg.Z  key_w_fix
        7.1.3.6    IV91214m6a.161209.epkg.Z  key_w_fix
  |     7.1.3.7    IV91214m7b.170202.epkg.Z  key_w_fix
  |     7.1.4.1    IV91255m1b.161213.epkg.Z  key_w_fix
        7.1.4.2    IV91255m2a.161213.epkg.Z  key_w_fix 
  |     7.1.4.3    IV91255m3c.161213.epkg.Z  key_w_fix
  |     7.2.0.0    IV91256m1b.161212.epkg.Z  key_w_fix
  |     7.2.0.1    IV91256m1b.161212.epkg.Z  key_w_fix
  |     7.2.0.2    IV91256m2b.161209.epkg.Z  key_w_fix
  |     7.2.1.0    IV91257m0a.161212.epkg.Z  key_w_fix
  |     7.2.1.1    IV91257m1a.161213.epkg.Z  key_w_fix

       

        Please note that the above table refers to AIX TL/SP level as
        opposed to fileset level, i.e., 7.1.3.5 is AIX 7100-03-05.

                   
        The above fixes are cumulative and address previously issued
        AIX BIND security bulletins with respect to SP and TL.           

        To extract the fixes from the tar file:

        tar xvf bind_fix14.tar
        cd bind_fix14 

        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
        -----------------------------------------------------------------------------------------------------
        fc27c599117b3c1b8ea3e74ce322c58d3477498c82a0c71d54d0972294debef5  IV91254m7b.161209.epkg.Z key_w_csum
        73e94631a9b1ebd11859ca54b7658b1f6d26bea871a73bdc6c7c05049f34d1ac  IV91214m4b.161209.epkg.Z key_w_csum
        4673c6157b4a923d4ba516323b6ebd6657dbea0711daba60fb4a72ef7d553caa  IV91214m5b.161209.epkg.Z key_w_csum
        3230a4ba01323c2f913728e039b84c0dd2c347b43bfe2c46c84999bfdaa08607  IV91214m6a.161209.epkg.Z key_w_csum
        ac59f32afb0be85fcbc30fdc734232da24625fd0d0d630bd9f21189b5bcafee9  IV91255m2a.161213.epkg.Z key_w_csum
        14660abd6992d2b688d42d7076505a844c7918b72f41932d865b2147154b7f49  IV91253m9b.161209.epkg.Z key_w_csum
        f557e8867ba671167862c00e6d482a3c831e2da26c8a47c456578b69432157e6  IV91254m6b.161213.epkg.Z key_w_csum
        2a63c8b31b718e1be2c25b69396b56d3d1123fb2e681c3957124aed7da734500  IV91254m8b.161209.epkg.Z key_w_csum
        d07cffaeda6228d0bcf2fe162d00f1d47125ae6fe242c6be64985aca5cf2076e  IV91255m1b.161213.epkg.Z key_w_csum
        9f50019a890d5f6d9f3a20805c6d31a0044586ded0ec29ba0b58c2c1a6423dc7  IV91255m3c.161213.epkg.Z key_w_csum
        b890c8a3991ef8707f44aa243e4873d902145b9fdda3e0230924f86d2e3482b1  IV91256m1b.161212.epkg.Z key_w_csum
        8c345a3c7c52dea528e74f910b54fad2d574ddc9e4d0beb1c45e3a19e50b793f  IV91256m2b.161209.epkg.Z key_w_csum
        4a3dd2f1e853912ff1d2394af0cc8f2a6a7f740057e4cae9c310b63011749165  IV91257m0a.161212.epkg.Z key_w_csum
        42fd10502ced5ca407d90738098712ead3f2dbb7cf628f047125565baa35b832  IV91257m1a.161213.epkg.Z key_w_csum
   |    9d87ec797d34a045387601374ff18995a767da4949989b97da1d277be51a473f  IV91214m7b.170202.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/bind_advisory14.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/bind_advisory14.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/bind_advisory14.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:

None.

CHANGE HISTORY:

First Issued: Thu Dec 15 22:06:41 CST 2016
|Updated: Thu Dec 29 12:28:16 CST 2016
|Update: New iFixes provided for AIX 5.3.12.9, 6.1.9.6, 6.1.9.8,
|7.1.4.1, 7.1.4.3, 7.2.0.0, 7.2.0.1, 7.2.0.2, 7.2.1.0, 7.2.1.1
|Updated: Wed Feb  8 16:52:50 CST 2017
|Update: New iFix provided for AIX 7.1.3.7

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

*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.