There are vulnerabilities in BIND that impact AIX.

2017-08-23T09:01:23
ID BIND_ADVISORY16.ASC
Type aix
Reporter CentOS Project
Modified 2017-11-13T14:29:35

Description

IBM SECURITY ADVISORY

First Issued: Wed Aug 23 09:01:23 CDT 2017 |Updated: Mon Nov 13 14:29:35 CST 2017 |Update 2: Updated the APAR section to reflect that the relevant APARs are | shipping in 6100-09-11, 7100-04-06, 7200-00-06, and 7200-01-04. | Corrected the impacted upper level filesets for 6100-09, 7100-04, | 7200-00, and 7200-01. Clarified that VIOS is impacted as well. | The following VRMFs are vulnerable: | AIX 6.1.9: bos.net.tcp.client up to and including 6.1.9.300 | AIX 7.1.4: bos.net.tcp.client up to and including 7.1.4.32 | AIX 7.2.0: bos.net.tcp.client_core up to and including 7.2.0.4 | AIX 7.2.1: bos.net.tcp.client_core up to and including 7.2.1.2 | New iFixes provided for AIX 6100-09-10, 7100-04-05, 7200-00-05, and | 7200-01-03, and iFix provided for VIOS 2.2.6.0.

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc https://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc ftp://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc

Security Bulletin: Vulnerabilities in BIND impact AIX (CVE-2017-3142 and CVE-2017-3143)

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

SUMMARY:

There are vulnerabilities in BIND that impact AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2017-3142
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3142
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3142
DESCRIPTION: ISC BIND could allow a remote attacker to bypass security 
    restrictions, caused by an error when an attacker can send and receive 
    messages to an authoritative DNS server and has knowledge of a valid 
    TSIG key name. By sending a specially crafted request packet, an 
    attacker could exploit this vulnerability to bypass TSIG authentication
    on AXFR requests and transfer the target zone.
CVSS Base Score:  5.3
CVSS Temporal Score: See 
    https://exchange.xforce.ibmcloud.com/vulnerabilities/127901 for the
    current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2017-3143
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3143
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3143
DESCRIPTION: ISC BIND could allow a remote attacker to bypass security 
    restrictions, caused by an error when an attacker can send and receive
    messages to an authoritative DNS server and has knowledge of a valid 
    TSIG key name. By sending specially crafted data, an attacker could 
    exploit this vulnerability to bypass TSIG authentication and 
    manipulate BIND into accepting an unauthorized dynamic update.
CVSS Base Score:  7.5
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/127902 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:H/A:N)


AFFECTED PRODUCTS AND VERSIONS:

    AIX  5.3, 6.1, 7.1, 7.2

| VIOS 2.2

    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 6.1.9.300 key_w_fs bos.net.tcp.client 7.1.3.0 7.1.3.49 key_w_fs | bos.net.tcp.client 7.1.4.0 7.1.4.32 key_w_fs | bos.net.tcp.client_core 7.2.0.0 7.2.0.4 key_w_fs | bos.net.tcp.client_core 7.2.1.0 7.2.1.2 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    IV98825    **          N/A  key_w_apar

| 6.1.9 IV98826 SP11 key_w_apar 7.1.3 IV98827 N/A key_w_apar | 7.1.4 IV98828 SP6 key_w_apar | 7.2.0 IV98829 SP6 key_w_apar | 7.2.1 IV98830 ** SP4 key_w_apar

        ** Please refer to AIX support lifecycle information page for 
        availability of Service Packs:
        http://www-01.ibm.com/support/docview.wss?uid=isg3T1012517

        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV98826
        http://www.ibm.com/support/docview.wss?uid=isg1IV98827 
        http://www.ibm.com/support/docview.wss?uid=isg1IV98828
        http://www.ibm.com/support/docview.wss?uid=isg1IV98829
        http://www.ibm.com/support/docview.wss?uid=isg1IV98830

        https://www.ibm.com/support/docview.wss?uid=isg1IV98826
        https://www.ibm.com/support/docview.wss?uid=isg1IV98827 
        https://www.ibm.com/support/docview.wss?uid=isg1IV98828
        https://www.ibm.com/support/docview.wss?uid=isg1IV98829
        https://www.ibm.com/support/docview.wss?uid=isg1IV98830

        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_fix16.tar
        http://aix.software.ibm.com/aix/efixes/security/bind_fix16.tar
        https://aix.software.ibm.com/aix/efixes/security/bind_fix16.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   IV98825m9a.170830.epkg.Z  key_w_fix
        6.1.9.7    IV98826m9a.170809.epkg.Z  key_w_fix
        6.1.9.8    IV98826m9a.170809.epkg.Z  key_w_fix
        6.1.9.9    IV98826m9a.170809.epkg.Z  key_w_fix

| 6.1.9.10 IV98826m0a.171105.epkg.Z key_w_fix 7.1.3.7 IV98827m3a.170808.epkg.Z key_w_fix 7.1.3.8 IV98827m3a.170808.epkg.Z key_w_fix 7.1.3.9 IV98827m3a.170808.epkg.Z key_w_fix 7.1.4.2 IV98828m4a.170808.epkg.Z key_w_fix 7.1.4.3 IV98828m4a.170808.epkg.Z key_w_fix 7.1.4.4 IV98828m4a.170808.epkg.Z key_w_fix | 7.1.4.5 IV98828m5b.171110.epkg.Z key_w_fix 7.2.0.2 IV98829m0a.170809.epkg.Z key_w_fix 7.2.0.3 IV98829m0a.170809.epkg.Z key_w_fix 7.2.0.4 IV98829m0a.170809.epkg.Z key_w_fix | 7.2.0.5 IV98829m0b.171106.epkg.Z key_w_fix 7.2.1.0 IV98830m1a.170809.epkg.Z key_w_fix 7.2.1.1 IV98830m1a.170809.epkg.Z key_w_fix 7.2.1.2 IV98830m1a.170809.epkg.Z key_w_fix | 7.2.1.3 IV98830m1b.171106.epkg.Z key_w_fix

| VIOS Level Interim Fix (*.Z) KEY | ----------------------------------------------- | 2.2.6.0 IV98826m0a.171105.epkg.Z key_w_fix

        Please note that the above table refers to AIX TL/SP level as
        opposed to fileset level, i.e., 7.1.3.7 is AIX 7100-03-07.


        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_fix16.tar
        cd bind_fix16

        Verify you have retrieved the fixes intact:

        The checksums below were generated using the
        "openssl dgst -sha256 [filename]" command as the following:

        openssl dgst -sha256                                              filename                 KEY
        -----------------------------------------------------------------------------------------------------
        28b9adcdee9562fa0d04fa8d9689305f4be5670455a8191e9383e7a961259814  IV98825m9a.170830.epkg.Z key_w_csum
        5c483daf9725efd11d1c46a8b81fcd3f33cd5fe97a7b8723384d4ab76b68c249  IV98826m9a.170809.epkg.Z key_w_csum

| 3f6115181d53724414c23a8af636d0e04c84a687f06c4796224eefe44e8720bf IV98826m0a.171105.epkg.Z key_w_csum 81ae02a234b85bcd1c60bb9e5f710ff44a90246444686fbf1c127bee17cc9b5d IV98827m3a.170808.epkg.Z key_w_csum 05037edcdb0db761be005550c216efd21d9787c9f2e3da2872f245b5bbd96673 IV98828m4a.170808.epkg.Z key_w_csum | f95f352d762c0daffff87053771f38b804684ca5be24857b38a5327e186b8c44 IV98828m5b.171110.epkg.Z key_w_csum 4e5273dea44179e3c46f617d6295492620eddce58675030a46e2531db263ccef IV98829m0a.170809.epkg.Z key_w_csum | 5cf4366ed68c335fdf38a4cdade7d7e7d1f6fbb047c0256ad026a010616dadea IV98829m0b.171106.epkg.Z key_w_csum 462f4c61f196ce49f99878447f975e748a51f4e3627ea93e6fa381f0ea6c3542 IV98830m1a.170809.epkg.Z key_w_csum | 1b95f895e6fedb661a7a707eb3f65ea0ac450dcc428e97dc8f08080e0961e369 IV98830m1b.171106.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 Support at
        http://ibm.com/support/ and describe the discrepancy.

        openssl dgst -sha1 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file]

        openssl dgst -sha1 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file]

        Published advisory OpenSSL signature file location:

        http://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/bind_advisory16.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.

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

CONTACT US:

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

Contact IBM Support for questions related to this announcement:

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


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 security-alert@austin.ibm.com 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: Wed Aug 23 09:01:23 CDT 2017 
Updated: Wed Sep 13 08:17:47 CDT 2017 
Update 1: Added AIX 5.3, 7.1.4, 7.2.0, and 7.2.1 as impacted.
    Impacted fileset information added for AIX 5.3, 7.1.4, 7.2.0, and 7.2.1.
    iFixes added for AIX 5.3.12.9, 7.1.4.2, 7.1.4.3, 7.1.4.4, 7.2.0.2,
    7.2.0.3, 7.2.0.4, 7.2.1.0, 7.2.1.1, 7.2.2.2.

| Updated: Mon Nov 13 14:29:35 CST 2017 | Update 2: Updated the APAR section to reflect that the relevant APARs are | shipping in 6100-09-11, 7100-04-06, 7200-00-06, and 7200-01-04. | Corrected the impacted upper level filesets for 6100-09, 7100-04, | 7200-00, and 7200-01. Clarified that VIOS is impacted as well. | The following VRMFs are vulnerable: | AIX 6.1.9: bos.net.tcp.client up to and including 6.1.9.300 | AIX 7.1.4: bos.net.tcp.client up to and including 7.1.4.32 | AIX 7.2.0: bos.net.tcp.client_core up to and including 7.2.0.4 | AIX 7.2.1: bos.net.tcp.client_core up to and including 7.2.1.2 | New iFixes provided for AIX 6100-09-10, 7100-04-05, 7200-00-05, and | 7200-01-03.

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

*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.