AIX printer commands vulnerability

2013-09-2515:55:39

CentOS Project

aix.software.ibm.com

0.0004 Low

EPSS

Percentile

5.2%

JSON

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IBM SECURITY ADVISORY

The most recent version of this document is available here:

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

===============================================================================
VULNERABILITY SUMMARY

VULNERABILITY: AIX printer commands vulnerability

|PLATFORMS: 5.3, 6.1 and 7.1 releases

SOLUTION: Apply the fix as described below.

THREAT: See below

CVE Numbers: CVE-2013-5419

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

===============================================================================
DETAILED INFORMATION

I. DESCRIPTION

Printer commands mkque and mkquedev are susceptible to buffer overflow 
by users belonging to the 'printq' group. These commands are owned by
'root' and SUID bit set. The group is set to 'printq'. By default, no
users are belong to the 'printq'.

II. CVSS

CVSS Base Score: 6.9
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/87481 for the
current score 
CVSS Environmental Score*: Undefined
CVSS String: (AV:L/AC:M/Au:N/C:C/I:C/A:C)

III. PLATFORM VULNERABILITY ASSESSMENT

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

lslpp -L bos.rte.printers


The following fileset levels are vulnerable:


AIX Fileset      Lower Level    Upper Level
--------------------------------------------------------

| bos.rte.printers 5.3.12.1 5.3.12.1
bos.rte.printers 6.1.7.0 6.1.7.16
bos.rte.printers 6.1.8.0 6.1.8.15
bos.rte.printers 7.1.1.0 7.1.1.16
bos.rte.printers 7.1.2.0 7.1.2.15

IV. SOLUTIONS

A. APARS

    IBM has assigned the following APARs to this problem:

    AIX Level           APAR number        Availability

    Subscribe to the APARs here:

| http://www.ibm.com/support/docview.wss?uid=isg1IV51388
http://www.ibm.com/support/docview.wss?uid=isg1IV47427
http://www.ibm.com/support/docview.wss?uid=isg1IV47428
http://www.ibm.com/support/docview.wss?uid=isg1IV47429
http://www.ibm.com/support/docview.wss?uid=isg1IV47430

    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 http
    from:

	http://aix.software.ibm.com/aix/efixes/security/cmdque_ifix1.tar

    The link above is to a tar file containing this signed
    advisory, fix packages, and PGP 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)
    -------------------------------------------------------------------

    To extract the fixes from the tar file:

    tar xvf cmdque_fix1.tar 
    cd cmdque_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
    ------------------------------------------------------------------

| b75987ce95b1bbabac2d3e346106eb5f0d833fa0 IV51388s8b.140226.epkg.Z
| 3dd02e731dc5ea74ba690b7a69ee0fb016871490 IV47427s8b.140226.epkg.Z
| 05ad2386fb6bb1589d31d06ef85a11e2ab901ae3 IV47428s3a.140221.epkg.Z
| de849091161a45500f2a69eaa956a43b619b1dc7 IV47429s8a.140221.epkg.Z
| aefb9a1e28510758b350ee7de47424f4df095233 IV47430s3a.140221.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 PGP 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.

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. CONTACT INFORMATION

If you would like to receive AIX Security Advisories via email,
please visit:

    http://www.ibm.com/systems/support

and click on the "My notifications" link.

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 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 our web page:

http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt

    C. 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.

VII. ACKNOWLEDGMENTS

IBM discovered and fixed this vulnerability as part of its
commitment to secure the AIX operating system.

VIII. 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
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/78907
CVE-2012-4833: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4833

*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.

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