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IBM SECURITY ADVISORY

First Issued: Thu Mar 6 11:54:14 CST 2014
| Updated: Tue Apr 8 09:03:53 CDT 2014
| Update: File set level for affected vwpar.53.rte corrected

The most recent version of this document is available here:

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

                       VULNERABILITY SUMMARY

VULNERABILITY: Security Vulnerability in WPAR ftp for AIX

PLATFORMS: 7.1

SOLUTION: Apply the fix as described below.

THREAT: See below.

CVE Number: CVE-2014-0899

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

                       DETAILED INFORMATION

I. DESCRIPTION

 If ftpd is run in a 5.2 or 5.3 WPAR, a non-root user who
 logs in via ftp is allowed to access all files within the WPAR.

II. CVSS

CVSS Base Score: 5.5
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/91396 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:P/A:P)

III. PLATFORM VULNERABILITY ASSESSMENT

The following fileset levels are vulnerable:

AIX Fileset        AIX Level       Lower Level       Upper Level    KEY
----------------------------------------------------------------------------
vwpar.52.rte       7.1.1           1.1.0.0           1.1.1.19      key_w_fs
vwpar.52.rte       7.1.2           1.1.2.0           1.1.2.17      key_w_fs

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

| vwpar.53.rte 7.1.1 1.1.0.0 1.1.1.18 key_w_fs
vwpar.53.rte 7.1.2 1.1.2.0 1.1.2.15 key_w_fs

NOTE: To find out whether the affected filesets are installed on your
systems, refer to the lslpp  command found in AIX user's guide.

IV. SOLUTIONS

A. APARS

    IBM has assigned the following APARs to this problem:

    AIX Level     APAR number      Availability    SP        KEY
    ---------------------------------------------------------------------
    7.1.1         IV51420          08/29/2014      SP10      key_w_apar
    7.1.2         IV51421          08/29/2014      SP5       key_w_apar

    Subscribe to the APARs here:

    http://www.ibm.com/support/docview.wss?uid=isg1IV51420
    http://www.ibm.com/support/docview.wss?uid=isg1IV51421

    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/wparcre_fix.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)             KEY
    ---------------------------------------------------------------------
    7.1.1.8    Wpar 5.2           IV51420s52.131030.epkg.Z      key_w_fix
    7.1.1.8    Wpar 5.3           IV51420s53.131031.epkg.Z      key_w_fix
    7.1.2.3    Wpar 5.2           IV51421s52.131030.epkg.Z      key_w_fix
    7.1.2.3    Wpar 5.3           IV51421s53.131031.epkg.Z      key_w_fix

    The epkg's named with an "s52" must be applied inside a 5.2 WPAR,
    and those with the "s53" must be applied inside a 5.3 WPAR. The 
    WPAR(s) can be either rootvg WPAR or non-rootvg; either is fine.

    To extract the fixes from the tar file:

    tar xvf wparcre_fix.tar
    cd wparcre_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
    ------------------------------------------------------------------
    a175a14ca5756b80649bd864d392eeddc1fc6451  IV51420s52.131030.epkg.Z
    fc1dac514e75cbe72ba571143f82ddfd6d2ad551  IV51420s53.131031.epkg.Z
    6550a8e30162348ab725b4750d979d3f9f5a9a85  IV51421s52.131030.epkg.Z
    301b071f5d95acb5b365bb91822619cbe7465bbf  IV51421s53.131031.epkg.Z

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

    csum -h SHA1 -i wparcre_advisory.asc
    sha1sum -c wparcre_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.

V. WORKAROUNDS

 Do not run ftpd in a 5.2 or 5.3 WPAR.

VI. CONTACT INFORMATION

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

    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 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:

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/91396
CVE-2014-0899: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0899

*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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