Vulnerability in Tivoli LWI impacts pConsole and WebSM for AIX

pconsole_advisory.asc: Version 3
Version 3 Issued: Tue Oct 25 14:55:49 CDT 2016
Version 3 Changes: Changed the impacted upper level filesets to match
those in the iFixes. Clarified that at least one of sysmgt.pconsole.rte
or sysmgt.websm.rte must be present in order to be impacted by
this vulnerability.

IBM SECURITY ADVISORY

First Issued: Thu Sep 22 16:13:43 CDT 2016
|Updated: Tue Oct 25 14:55:49 CDT 2016
|Update: Changed the impacted upper level filesets to match those
| in the iFixes. Clarified that at least one of sysmgt.pconsole.rte
| or sysmgt.websm.rte must be present in order to be impacted by
| this vulnerability.

The most recent version of this document is available here:

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

|This replaces pconsole_mitigation.asc.

Security Bulletin: Vulnerability in Tivoli LWI impacts pConsole and WebSM for
AIX (CVE-2016-6038)

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

SUMMARY:

A directory traversal vulnerability in the Eclipse Help component shipped
by the Tivoli Lightweight Infrastructure (LWI) allows remote attackers to
read arbitrary files via a crafted URL.  This vulnerability affects IBM 
System Director Console for AIX (pConsole) and Web Based System
Management Remote Client (WebSM Remote).

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

VULNERABILITY DETAILS:

CVEID: CVE-2016-6038
DESCRIPTION: A directory traversal vulnerability in the Eclipse Help
    component shipped by Tivoli Lightweight Infrastructure (LWI) allows
    remote attackers to read arbitrary files via a crafted URL. This
    vulnerability affects IBM System Director Console for AIX (pconsole)
    and Web Based System Management Remote Client (WebSM Remote).
CVSS Base Score: 6.5
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/117019 for the
    current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

AFFECTED PRODUCTS AND VERSIONS:

    AIX 5.3, 6.1, 7.1
   

    Some AIX releases are potentially vulnerable if an impacted LWI version
    is present on the system. 

| 1. If one or both of the following filesets are installed, then LWI
| version will need to be verified:

    sysmgt.pconsole.rte
    sysmgt.websm.rte

| If neither sysmgt.pconsole.rte nor sysmgt.websm.rte are installed,
| then the system is not impacted by this vulnerability.

    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 sysmgt.pconsole.rte  

    2. Verify LWI version. The following LWI versions are vulnerable:
    
    Fileset       Lower Level  Upper Level
    ---------------------------------------
    lwi.runtime   5.3.12.1     5.3.12.1        

| lwi.runtime 6.1.9.0 6.1.9.99
| lwi.runtime 7.1.3.0 7.1.3.100

    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 lwi.runtime 

   


    VIOS 2.2.3.5x

    VIOS 2.2.3.5x and older releases are vulnerable due to an impacted LWI
    version included in the fileset sysmgt.websm.rte.  

    Note: VIOS 2.2.3.60, 2.2.4.0 and newer releases are not vulnerable.     

REMEDIATION:

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

        AIX Level APAR     Availability  SP   KEY
        ------------------------------------------------
        5.3.12    IV89386  N/A           N/A  key_w_apar
        6.1.9     IV89418  NOW           SP6  key_w_apar
        7.1.3     IV89385  1/27/17       SP8  key_w_apar

        VIOS Level APAR  Availability  Release   KEY
        -------------------------------------------------
        2.2.4     IV89418  NOW         2.2.4.0  key_w_apar


        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV89386
        http://www.ibm.com/support/docview.wss?uid=isg1IV89418
        http://www.ibm.com/support/docview.wss?uid=isg1IV89385

        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/pconsole_fix.tar
        http://aix.software.ibm.com/aix/efixes/security/pconsole_fix.tar
        https://aix.software.ibm.com/aix/efixes/security/pconsole_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
        ----------------------------------------------
        5.3.12.9   IV89386s9c.160923.epkg.Z  key_w_fix
        6.1.9.5    IV89418s5a.160927.epkg.Z  key_w_fix
        7.1.3.5    IV89385s7a.160927.epkg.Z  key_w_fix
        7.1.3.6    IV89385s7a.160927.epkg.Z  key_w_fix
        7.1.3.7    IV89385s7a.160927.epkg.Z  key_w_fix
         
        To extract the fixes from the tar file:

        tar xvf pconsole_fix.tar
        cd pconsole_fix

        Verify you have retrieved the fixes intact:

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

        openssl dgst -sha256                                              filename                 KEY
        -----------------------------------------------------------------------------------------------------
        e4eb27e63211cd8ae69b38b7fbd9c81ed7a90a41f4cc5940bfe1a33f45a93ee8  IV89385s7a.160927.epkg.Z key_w_csum
        fe18aa98b59f80b74760671aef16006be7490dea19ff116ea04df6890af261d7  IV89386s9c.160927.epkg.Z key_w_csum
        c8bc7a55a9c4b8e8f125fe050296c9a480c5ec81efde2f71556d75811ccbbb8f  IV89418s5a.160927.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 <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/pconsole_advisory.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/pconsole_advisory.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/pconsole_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

        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:

    Current mitigation is to disable IBM System Director
    Console (pConsole) for AIX 6.1 and 7.1 and disable
    Web Based System Manager (WebSM) Remote Client for AIX 5.3 and 
    6.1:

    1.  Stop the services:

        AIX 6.1 and 7.1:  # stopsrc -s pconsole
        AIX 5.3 and 6.1:  # stopsrc -s http4websm

    2.  Verify the services are inoperative:

        AIX 6.1 and 7.1:  # lssrc -s pconsole
        AIX 5.3 and 6.1:  # lssrc -s http4websm 

    3.  If system is restarted, please follow steps 1. and 2. again.

    SMIT may be used as an alternative for system administration.

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

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:

    [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 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

    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:

None.

CHANGE HISTORY:

First Issued: Thu Sep 22 16:13:43 CDT 2016 
Updated: Fri Sep 30 14:51:49 CDT 2016 
Update: iFixes added for the latest, impacted, supported AIX TLs.

| Updated: Tue Oct 25 14:55:49 CDT 2016
| Update: Changed the impacted upper level filesets to match those
| in the iFixes. Clarified that at least one of sysmgt.pconsole.rte
| or sysmgt.websm.rte must be present in order to be impacted by
| this vulnerability.

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

*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.