Vulnerability in lsmcode affects AIX,Vulnerability in lsmcode affects VIOS

2016-10-17T08:54:26
ID LSMCODE_ADVISORY2.ASC
Type aix
Reporter CentOS Project
Modified 2016-11-02T10:13:38

Description

lsmcode_advisory2.asc: Version 5 Version 5 Issued: Fri Nov 11 08:21:26 CST 2016 Version 5 Changes: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require a reboot.

IBM SECURITY ADVISORY

First Issued: Mon Oct 17 08:54:26 CDT 2016 |Updated: Fri Nov 11 08:21:26 CST 2016 |Update: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require a reboot.

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc https://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc ftp://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc

Security Bulletin: Vulnerability in lsmcode affects AIX (CVE-2016-3053)

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

SUMMARY:

There is a vulnerability in lsmcode that impacts AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2016-3053
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3053
DESCRIPTION: IBM AIX contains an unspecified vulnerability that would
    allow a locally authenticated user to obtain root level privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/114723 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.rte.shell       6.1.9.0      6.1.9.101   key_w_fs
    bos.rte.libc        6.1.9.0      6.1.9.101   key_w_fs
    bos.rte.shell       7.1.3.0      7.1.3.47    key_w_fs
    bos.rte.libc        7.1.3.0      7.1.3.47    key_w_fs
    bos.rte.shell       7.1.4.0      7.1.4.1     key_w_fs
    bos.rte.libc        7.1.4.0      7.1.4.1     key_w_fs
    bos.rte.shell       7.2.0.0      7.2.0.1     key_w_fs
    bos.rte.libc        7.2.0.0      7.2.0.1     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.rte.shell


REMEDIATION:

    A. APARS

        IBM has assigned the following APARs to this problem:

        AIX Level APAR     Availability  SP   KEY
        ------------------------------------------------
        6.1.9     IV87794  11/11/16      SP8  key_w_apar
        7.1.3     IV88457  1/27/17       SP8  key_w_apar
        7.1.4     IV88007  11/11/16      SP3  key_w_apar
        7.2.0     IV88042  1/27/17       SP3  key_w_apar


        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV87794
        http://www.ibm.com/support/docview.wss?uid=isg1IV88457
        http://www.ibm.com/support/docview.wss?uid=isg1IV88007
        http://www.ibm.com/support/docview.wss?uid=isg1IV88042

        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/lsmcode_fix2.tar
        http://aix.software.ibm.com/aix/efixes/security/lsmcode_fix2.tar
        https://aix.software.ibm.com/aix/efixes/security/lsmcode_fix2.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
        ----------------------------------------------
        6.1.9.5    IV87794s5a.160913.epkg.Z  key_w_fix
        6.1.9.6    IV87794s6a.160912.epkg.Z  key_w_fix
        6.1.9.7    IV87794s7b.160822.epkg.Z  key_w_fix
        7.1.3.5    IV88457s5a.160912.epkg.Z  key_w_fix
        7.1.3.6    IV88457s6a.160912.epkg.Z  key_w_fix 
        7.1.3.7    IV88457s7a.160822.epkg.Z  key_w_fix
        7.1.4.0    IV88007s0a.160913.epkg.Z  key_w_fix
        7.1.4.1    IV88007s0a.160913.epkg.Z  key_w_fix

| 7.1.4.2 IV88007s2a.161110.epkg.Z key_w_fix 7.2.0.0 IV88042s0a.160914.epkg.Z key_w_fix 7.2.0.1 IV88042s0a.160914.epkg.Z key_w_fix | 7.2.0.2 IV88042s2a.161110.epkg.Z key_w_fix

        VIOS Level  Interim Fix (*.Z)         KEY
        -----------------------------------------------
        2.2.3.70    IV87794s7b.160822.epkg.Z  key_w_fix
        2.2.4.0     IV87794s6a.160912.epkg.Z  key_w_fix
        2.2.4.2x    IV87794s7b.160822.epkg.Z  key_w_fix


        To extract the fixes from the tar file:

        tar xvf lsmcode_fix2.tar
        cd lsmcode_fix2

        Verify you have retrieved the fixes intact:

        The checksums below were generated using the
        "openssl dgst -sha256 file" command as the followng:

        openssl dgst -sha256                                              filename                 KEY
        -----------------------------------------------------------------------------------------------------
        cde88dbb526dae02a337a9e83cffed5c225cce1681bc4775bedca3a48e7ab74b  IV87794s5a.160913.epkg.Z key_w_csum
        bd4b02216d64a336b69eea32f0786fbba794b0a09f5a5e97be7c15c4349ee2c2  IV87794s6a.160912.epkg.Z key_w_csum
        f964863f7342a29b5c565c9410ebf716808683e9565d3df8fd5cbca81a05393a  IV87794s7b.160822.epkg.Z key_w_csum
        eba6ef5f7df4df7b4e9cac20348933d6970b3876f896fc8c56705109f174f314  IV88007s0a.160913.epkg.Z key_w_csum

| 69045d861fbdad2849195353810fa6d882fca5d17a7173dc4a5dc516085a1ba5 IV88007s2a.161110.epkg.Z key_w_csum fbd78c77dfb09bc9ca9126f70b00f9f52c5c702779cf5f54897d06bb7c8b92c6 IV88042s0a.160914.epkg.Z key_w_csum | 7cfa923a2ed065817575d43aa25d7666e422565f258bc39c71ef53c6185c636b IV88042s2a.161110.epkg.Z key_w_csum 42f139b4ef8cc87fe61903e3bde0dcb33447bbd85774eec5a3c858edd5c964c7 IV88457s5a.160912.epkg.Z key_w_csum 9a8f09927b9f5b40857c01caf40d168d3a0792db4f3b22906189f3acb18300eb IV88457s6a.160912.epkg.Z key_w_csum d6364b3447b2126dc533586d3df29e1c6dfe69443277146147d62fde85d688d7 IV88457s7a.160822.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
        security-alert@austin.ibm.com 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/lsmcode_advisory2.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.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

        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.

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

To view previously issued advisories, please visit:

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

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

    security-alert@austin.ibm.com

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 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

    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
On-line Calculator v3:
    http://www.first.org/cvss/calculator/3.0

ACKNOWLEDGEMENTS:

Vulnerability research and notification provided by Rhino Security Labs.

CHANGE HISTORY:

First Issued: Mon Oct 17 08:54:26 CDT 2016
Updated: Wed Oct 19 09:35:27 CDT 2016
Update: Clarified that reboot after installation of the iFixes
    is only recommended and not required.
Updated: Tue Nov  1 15:35:35 CDT 2016
Update: Updated the ACKNOWLEDGEMENTS section to appropriately
    credit Rhino Security Labs.
Updated: Wed Nov  2 10:13:38 CDT 2016
Update: iFix information now provided for VIOS 2.2.3.70.

| Updated: Fri Nov 11 08:21:26 CST 2016 | Update: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require a | reboot.

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

*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.