Vulnerability in AIX inet

2013-06-0414:01:37

CentOS Project

aix.software.ibm.com

0.054 Low

EPSS

Percentile

93.2%

JSON

IBM SECURITY ADVISORY

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

                       VULNERABILITY SUMMARY

VULNERABILITY: Vulnerability in AIX inet

PLATFORMS: AIX 6.1 and 7.1 releases
| VIOS 2.X

SOLUTION: Apply the fix as described below

THREAT: A remote attacker can cause denial of service

CVE Number: CVE-2013-3035 CVSS=7.1

| Reboot required? YES
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO

                       DETAILED INFORMATION

I. DESCRIPTION

If an AIX machine has IPv6 address configured, and if a malformed IPv6
packet in a specific format is sent to that machine, the machine can hang
while processing that packet. The problem can happen only if an IPv6
address is configured on any of the network interfaces.

II. CVSS

CVSS Base Score: 7.1
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/84657 for the
current score
CVSS Environmental Score*: Undefined 
CVSS String: (AV:N/AC:M/Au:N/C:N/I:N/A:C)

III. PLATFORM VULNERABILITY ASSESSMENT

Note: To use the following commands on VIOS you must first
execute:

oem_setup_env

To determine if your system is vulnerable, execute the following
command:

lslpp -L bos.net.tcp.client

The following fileset levels are vulnerable:

AIX Fileset        Lower Level       Upper Level   KEY
---------------------------------------------------------- 
bos.net.tcp.client  6.1.6.0           6.1.6.22     key_w_fs
bos.net.tcp.client  6.1.7.0           6.1.7.18     key_w_fs
bos.net.tcp.client  6.1.8.0           6.1.8.15     key_w_fs
bos.net.tcp.client  7.1.0.0           7.1.0.23     key_w_fs
bos.net.tcp.client  7.1.1.0           7.1.1.18     key_w_fs
bos.net.tcp.client  7.1.2.0           7.1.2.15     key_w_fs

IV. SOLUTIONS

A. APARS

    IBM has assigned the following APARs to this problem:

    AIX Level           APAR number        Availability    KEY
    -------------------------------------------------------------
    6.1.6               IV37925            08/16/13 SP12   key_w_apar
    6.1.7               IV42072            08/16/13 SP8    key_w_apar
    6.1.8               IV42124            08/16/13 SP3    key_w_apar
    7.1.0               IV42264            08/16/13 SP10   key_w_apar
    7.1.1               IV42229            08/16/13 SP8    key_w_apar
    7.1.2               IV42095            08/16/13 SP3    key_w_apar

    Subscribe to the APARs here:

    http://www.ibm.com/support/docview.wss?uid=isg1IV37925
    http://www.ibm.com/support/docview.wss?uid=isg1IV42072
    http://www.ibm.com/support/docview.wss?uid=isg1IV42124
    http://www.ibm.com/support/docview.wss?uid=isg1IV42264
    http://www.ibm.com/support/docview.wss?uid=isg1IV42229
    http://www.ibm.com/support/docview.wss?uid=isg1IV42095

    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
    from:

    ftp://aix.software.ibm.com/aix/efixes/security/inet_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
    -------------------------------------------------------------------
    6.1.6.11                      IV37925sBa.130508.epkg.Z   key_w_fix
    6.1.7.7                       IV42072s7a.130508.epkg.Z   key_w_fix
    6.1.8.2                       IV42124s2a.130514.epkg.Z   key_w_fix
    7.1.0.8                       IV42264s8a.130514.epkg.Z   key_w_fix
    7.1.0.9                       IV42264s9a.130522.epkg.Z   key_w_fix
    7.1.1.6                       IV42229s6a.130514.epkg.Z   key_w_fix
    7.1.1.7                       IV42229s7a.130522.epkg.Z   key_w_fix
    7.1.2.2                       IV42095s2a.130514.epkg.Z   key_w_fix

    VIOS Level                    Interim Fix (*.Z)
    -------------------------------------------------------------------
    2.2.2.2-FP-26 SP-02           IV42124s2a.130514.epkg.Z

    To extract the fixes from the tar file:

    tar xvf inet_fix.ar
    cd inet_fix

    Verify you have retrieved the fixes intact:

    The checksums below were generated using the
    "csum -h SHA1" (sha1sum) command is the followng:

    csum -h SHA1 (sha1sum)                    filename
    ------------------------------------------------------------------
    ded6762cd5859f2dfd7e70fe085f538102102f28  IV37925sBa.130508.epkg.Z
    6f24b16eb3894b796aeb43572e9a2b289b690109  IV42072s7a.130508.epkg.Z
    c5c264e03c64a202c385c390c7e3e18544db838b  IV42124s2a.130514.epkg.Z
    934aa178d3bba6de9298e916952e4fb439ad6cc0  IV42264s8a.130514.epkg.Z
    f927a3a8f95f33c928639bb99aa21f4ecd43b890  IV42264s9a.130522.epkg.Z
    91a04e749c6f0c6915a14c3512b0b54d07fa818d  IV42229s6a.130514.epkg.Z
    5cb383123559a990b1c791af928612e5700df0d8  IV42229s7a.130522.epkg.Z
    763ea42371e9aac8a3b3e7bb1a11c160e8c0c199  IV42095s2a.130514.epkg.Z
    c5c264e03c64a202c385c390c7e3e18544db838b  IV42124s2a.130514.epkg.Z

    To verify the sum, use the text of this advisory as input to sha1sum.
    For example:

    csum -h SHA1 -i Advisory.asc
    sha1sum -c Advisory.asc

    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 AIX_PSIRT_pub.asc -signature file.asc.sig file.asc

 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.

V. WORKAROUNDS

| There are no workarounds.

VI. OBTAINING FIXES

AIX security fixes can be downloaded from:

    ftp://aix.software.ibm.com/aix/efixes/security

AIX fixes can be downloaded from:

    http://www.ibm.com/eserver/support/fixes/fixcentral/main/pseries/aix

NOTE: Affected customers are urged to upgrade to the latest
applicable Technology Level and Service Pack.

VII. CONTACT INFORMATION

If you would like to receive AIX Security Advisories via email,
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 request the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:

    A. Send an email with "get key" in the subject line to:

        [email protected]

    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.

eServer is a trademark of International Business Machines
Corporation.  IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation.  All other trademarks
are property of their respective holders.

VIII. REFERENCES:

Note: Keywords labeled as KEY in this document are used for parsing purposes.

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
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/84657
CVE-2013-3035: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3035

*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 Flash.

Note: 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.