Vulnerabilities in NTPv4 affect AIX,Vulnerabilities in NTPv4 affect VIOS

2015-06-2910:00:16

CentOS Project

aix.software.ibm.com

4.3 Medium

CVSS2

Access Vector

ADJACENT_NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.008 Low

EPSS

Percentile

81.4%

JSON

IBM SECURITY ADVISORY

First Issued: Mon Jun 29 10:00:16 CDT 2015

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/ntp4_advisory.asc
https://aix.software.ibm.com/aix/efixes/security/ntp4_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/ntp4_advisory.asc

Security Bulletin: Vulnerabilities in NTPv4 affect AIX

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

SUMMARY:

There are two vulnerabilities in NTPv4 that affect AIX.

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

VULNERABILITY DETAILS:

CVEID: CVE-2014-9297
    https://vulners.com/cve/CVE-2014-9297
DESCRIPTION:
    Network Time Protocol (NTP) Project NTP daemon (ntpd) could allow a
    remote attacker to conduct spoofing attacks, caused by insufficient
    entropy in PRNG. An attacker could exploit this vulnerability to spoof
    the IPv6 address ::1 to bypass ACLs and launch further attacks on the
    system.
CVSS:
    CVSS Base Score: 5.00
    CVSS Temporal Score: See 
    http://xforce.iss.net/xforce/xfdb/100004 for the current score. 
    CVSS Environmental Score*: Undefined
    CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVEID: CVE-2015-1799
    https://vulners.com/cve/CVE-2015-1799
DESCRIPTION:
    Network Time Protocol (NTP) Project NTP daemon (ntpd) is vulnerable
    to a denial of service, caused by an error when using symmetric key
    authentication. By sending specially-crafted packets to both peering
    hosts, an attacker could exploit this vulnerability to prevent
    synchronization.
CVSS:
    CVSS Base Score: 5.40
    CVSS Temporal Score: See
    http://xforce.iss.net/xforce/xfdb/102052 for the current score.
    CVSS Environmental Score*: Undefined
    CVSS Vector: (AV:A/AC:M/Au:N/C:P/I:P/A:P)


AFFECTED PRODUCTS AND VERSIONS:

    AIX 6.1, 7.1
    VIOS 2.2.x

    The following fileset levels are vulnerable:

    AIX Fileset         Lower Level Upper Level KEY
    --------------------------------------------------------
    ntp.rte             6.1.0.0     6.1.6.4     key_w_fs
    ntp.rte             7.1.0.0     7.1.0.4     key_w_fs

    AIX Fileset (VIOS)  Lower Level           Upper Level
    ------------------------------------------------------------
    ntp.rte             6.1.0.0(2.2.0.0)      6.1.6.4(2.2.2.6)
    ntp.rte             6.1.0.0(2.2.0.0)      6.1.6.4(2.2.3.4)


    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 ntp.rte 


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

        AIX Level APAR     Availability  SP   KEY
        ---------------------------------------------------
        6.1.9     IV71094  12/4/15       SP6  key_w_apar
        7.1.3     IV71096  2/26/16       SP6  key_w_apar

        Subscribe to the APARs here:

        http://www.ibm.com/support/docview.wss?uid=isg1IV71094
        http://www.ibm.com/support/docview.wss?uid=isg1IV71096

        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/ntp4_fix.tar
        http://aix.software.ibm.com/aix/efixes/security/ntp4_fix.tar
        https://aix.software.ibm.com/aix/efixes/security/ntp4_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
        ------------------------------------------------
        6.1        IV71094s0a.150618.epkg.Z  key_w_fix
        7.1        IV71096s0a.150618.epkg.Z  key_w_fix

        To extract the fixes from the tar file:

        tar xvf ntp4_fix.tar
        cd ntp4_fix

        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
        -----------------------------------------------------------------------------------------------------
        daa13bf1d503c5e955b86ebd997895bf0bb47d9394f7d858a2628f762a062344  IV71094s0a.150618.epkg.Z key_w_csum
        811e3169a1c244a48d6380f8eb1462b47e2c2c8c7db8a20e3165de7fd0bba822  IV71096s0a.150618.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/ntp4_advisory.asc.sig
        https://aix.software.ibm.com/aix/efixes/security/ntp4_advisory.asc.sig
        ftp://aix.software.ibm.com/aix/efixes/security/ntp4_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 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.

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

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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 Guide:  http://www.first.org/cvss/cvss-guide.html
On-line Calculator V2:  
http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2

ACKNOWLEDGEMENTS:

None.

CHANGE HISTORY:

First Issued: Mon Jun 29 10:00:16 CDT 2015

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

*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.