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aixCentOS ProjectRMSOCK_ADVISORY2.ASC
HistoryJun 21, 2018 - 2:07 p.m.

Vulnerability in rmsock affects AIX (CVE-2018-1655),Vulnerability in rmsock affects VIOS (CVE-2018-1655)

2018-06-2114:07:15
CentOS Project
aix.software.ibm.com
583

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.001

Percentile

22.9%

JSON

IBM SECURITY ADVISORY

First Issued: Thu Jun 21 14:07:15 CDT 2018
|Updated: Tue Jul 3 08:09:45 CDT 2018
|Update: Additional iFixes are now available. Additional iFixes are now available
| for:
| AIX 6100-09-09 and 6100-09-10
| AIX 7100-04-04 and 7100-04-05
| AIX 7100-05-00 and 7100-05-01
| AIX 7200-00-04 and 7200-00-05
| AIX 7200-01-02 and 7200-01-03
| AIX 7200-02-00 and 7200-02-01
| VIOS 2.2.4.40, 2.2.4.50, and 2.2.4.60
| VIOS 2.2.5.20, 2.2.5.30, and 2.2.5.40
| VIOS 2.2.6.10

The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/rmsock_advisory2.asc
https://aix.software.ibm.com/aix/efixes/security/rmsock_advisory2.asc
ftp://aix.software.ibm.com/aix/efixes/security/rmsock_advisory2.asc

Security Bulletin: Vulnerability in rmsock affects AIX (CVE-2018-1655)

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

SUMMARY:

There is a vulnerability in the rmsock command that affects AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2018-1655
    https://vulners.com/cve/CVE-2018-1655
    https://vulners.com/cve/CVE-2018-1655
DESCRIPTION: IBM AIX contains a vulnerability in the rmsock command that 
    may be used to expose kernel memory.
CVSS Base Score: 4
CVSS Temporal Score: See 
    https://exchange.xforce.ibmcloud.com/vulnerabilities/144748 
    for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)


AFFECTED PRODUCTS AND VERSIONS:

    AIX 5.3, 6.1, 7.1, 7.2
    VIOS 2.2.x 

    The vulnerabilities in the following filesets are being addressed:
    
    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      6.1.9.315   key_w_fs
    bos.net.tcp.client      7.1.4.0      7.1.4.33    key_w_fs
    bos.net.tcp.client      7.1.5.0      7.1.5.15    key_w_fs
    bos.net.tcp.client_core 7.2.0.0      7.2.0.5     key_w_fs
    bos.net.tcp.client_core 7.2.1.0      7.2.1.3     key_w_fs
    bos.net.tcp.client_core 7.2.2.0      7.2.2.16    key_w_fs

    
    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

    Note: AIX or VIOS users of all fileset levels should continue to monitor
    their My Notifications alerts and the IBM PSIRT Blog for additional 
    information about these vulnerabilities:

    - My Notifications
      http://www.ibm.com/support/mynotifications


REMEDIATION:

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

        AIX Level APAR     Availability  SP   KEY
        ------------------------------------------------
        5.3.12    IJ06935  **            N/A  key_w_apar
        6.1.9     IJ06905  **            SP12 key_w_apar
        7.1.4     IJ06906  **            SP7  key_w_apar
        7.1.5     IJ06904  **            SP3  key_w_apar
        7.2.0     IJ06934  **            N/A  key_w_apar
        7.2.1     IJ06907  **            SP5  key_w_apar
        7.2.2     IJ06908  **            SP3  key_w_apar

        VIOS Level APAR    Availability  SP       KEY
        ----------------------------------------------------

| 2.2.4 IJ06905 ** N/A key_w_apar
| 2.2.5 IJ06905 ** 2.2.5.50 key_w_apar
2.2.6 IJ06905 ** 2.2.6.30 key_w_apar

        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IJ06904
        http://www.ibm.com/support/docview.wss?uid=isg1IJ06905
        http://www.ibm.com/support/docview.wss?uid=isg1IJ06906
        http://www.ibm.com/support/docview.wss?uid=isg1IJ06907
        http://www.ibm.com/support/docview.wss?uid=isg1IJ06908
        http://www.ibm.com/support/docview.wss?uid=isg1IJ06934

        https://www.ibm.com/support/docview.wss?uid=isg1IJ06904
        https://www.ibm.com/support/docview.wss?uid=isg1IJ06905
        https://www.ibm.com/support/docview.wss?uid=isg1IJ06906
        https://www.ibm.com/support/docview.wss?uid=isg1IJ06907
        https://www.ibm.com/support/docview.wss?uid=isg1IJ06908
        https://www.ibm.com/support/docview.wss?uid=isg1IJ06934

        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

        AIX and VIOS fixes are available.

        The AIX/VIOS fixes can be downloaded via ftp or http from:

        ftp://aix.software.ibm.com/aix/efixes/security/rmsock_fix2.tar
        http://aix.software.ibm.com/aix/efixes/security/rmsock_fix2.tar
        https://aix.software.ibm.com/aix/efixes/security/rmsock_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
        ----------------------------------------------
        5.3.12.9   IJ06935s1a.180611.epkg.Z  key_w_fix

| 6.1.9.9 IJ06905s9a.180608.epkg.Z key_w_fix
| 6.1.9.10 IJ06905s9a.180608.epkg.Z key_w_fix
6.1.9.11 IJ06905s9a.180608.epkg.Z key_w_fix
| 7.1.4.4 IJ06906s4a.180607.epkg.Z key_w_fix
| 7.1.4.5 IJ06906s4a.180607.epkg.Z key_w_fix
7.1.4.6 IJ06906s4a.180607.epkg.Z key_w_fix
| 7.1.5.0 IJ06904s5a.180607.epkg.Z key_w_fix
| 7.1.5.1 IJ06904s5a.180607.epkg.Z key_w_fix
7.1.5.2 IJ06904s5a.180607.epkg.Z key_w_fix
| 7.2.0.4 IJ06934s0a.180607.epkg.Z key_w_fix
| 7.2.0.5 IJ06934s0a.180607.epkg.Z key_w_fix
7.2.0.6 IJ06934s0a.180607.epkg.Z key_w_fix
| 7.2.1.2 IJ06907s1a.180607.epkg.Z key_w_fix
| 7.2.1.3 IJ06907s1a.180607.epkg.Z key_w_fix
7.2.1.4 IJ06907s1a.180607.epkg.Z key_w_fix
| 7.2.2.0 IJ06908s2a.180607.epkg.Z key_w_fix
| 7.2.2.1 IJ06908s2a.180607.epkg.Z key_w_fix
7.2.2.2 IJ06908s2a.180607.epkg.Z key_w_fix

        Please note that the above table refers to AIX TL/SP level as
        opposed to fileset level, i.e., 7.2.2.2 is AIX 7200-02-02.


        VIOS Level  Interim Fix (*.Z)         KEY
        -----------------------------------------------

| 2.2.4.40 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.4.50 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.4.60 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.5.20 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.5.30 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.5.40 IJ06905s9a.180608.epkg.Z key_w_fix
| 2.2.6.10 IJ06905s9a.180608.epkg.Z key_w_fix
2.2.6.20 IJ06905s9a.180608.epkg.Z key_w_fix
2.2.6.21 IJ06905s9a.180608.epkg.Z key_w_fix

        To extract the fixes from the tar file:

        tar xvf rmsock_fix2.tar 
        cd rmsock_fix2

        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
        -----------------------------------------------------------------------------------------------------
        ecf6f66a7b4b46d409d793f20040ee482483b1574171fb9359a923dd4895ab1a  IJ06904s5a.180607.epkg.Z key_w_csum
        c3c126553e839d9005e57b9c86c64ee9ec6bbaf2ab9a11a1999c5e513a27169c  IJ06905s9a.180608.epkg.Z key_w_csum
        c9853fd282018e3d4a7f43d7be2bdb8683e0b6fcafa030b0da3066071714a58b  IJ06906s4a.180607.epkg.Z key_w_csum
        d315a1422bad889b916b05bedd3f7a2017a6fd0cec92102bf82a4ae29097778e  IJ06907s1a.180607.epkg.Z key_w_csum
        1cf55bf5ba872df48e210a65d5d0830f08cff0173dc5cc6570be7b6a02268241  IJ06908s2a.180607.epkg.Z key_w_csum
        b9ff613c66d80bb855808e2ef94a67d5643fd7587b134dc6a5619ac708c3a8d0  IJ06934s0a.180607.epkg.Z key_w_csum
        1403b64ca4a545ef791460764a184d5a48a7112daec235474f070c5ff569e6cd  IJ06935s1a.180611.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/rmsock_advisory2.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/rmsock_advisory2.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/rmsock_advisory2.asc.sig 

    C. FIX AND INTERIM FIX INSTALLATION

        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

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

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

RELATED INFORMATION:

IBM Secure Engineering Web Portal
    http://www.ibm.com/security/secure-engineering/bulletins.html

IBM Product Security Incident Response Blog
    https://www.ibm.com/blogs/psirt/

Security Bulletin: Vulnerability in rmsock affects AIX (CVE-2018-1655)
    http://www-01.ibm.com/support/docview.wss?uid=isg3T1027880

ACKNOWLEDGEMENTS:

The vulnerability was reported to IBM by Tim Brown, Security Advisor
EMEAR, Cisco..

CHANGE HISTORY:

First Issued: Thu Jun 21 14:07:15 CDT 2018

| Updated: Tue Jul 3 08:09:45 CDT 2018
| Update: Additional iFixes are now available. Additional iFixes are now available
| for:
| AIX 6100-09-09 and 6100-09-10
| AIX 7100-04-04 and 7100-04-05
| AIX 7100-05-00 and 7100-05-01
| AIX 7200-00-04 and 7200-00-05
| AIX 7200-01-02 and 7200-01-03
| AIX 7200-02-00 and 7200-02-01
| VIOS 2.2.4.40, 2.2.4.50, and 2.2.4.60
| VIOS 2.2.5.20, 2.2.5.30, and 2.2.5.40
| VIOS 2.2.6.10

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

*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.

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CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.001

Percentile

22.9%

JSON
Related for RMSOCK_ADVISORY2.ASC
talos1cvelist1nessus1prion1attackerkb1ibm1nvd1cve1