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AUSCERT External Security Bulletin Redistribution
ESB-2013.0992
Security Vulnerabilities in AIX InfiniBand
18 July 2013
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: AIX InfiniBand
Publisher: IBM
Operating System: AIX
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2013-4011
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IBM SECURITY ADVISORY
First Issued: Tue Jul 16 10:46:04 CDT 2013
http://aix.software.ibm.com/aix/efixes/security/infiniband_advisory.asc
===============================================================================
VULNERABILITY SUMMARY
VULNERABILITY: Security Vulnerabilities in AIX InfiniBand
PLATFORMS: AIX 6.1 and 7.1 releases
SOLUTION: Apply the fix as described below
THREAT: A local attacker could gain lateral or elevated privileges
CVE Number: CVE-2013-4011
Reboot required? NO
Workarounds? YES
Protected by FPM? NO
Protected by SED? NO
===============================================================================
DETAILED INFORMATION
I. DESCRIPTION
Both "ibstat" and .arp.ib. commands have security vulnerabilities that
can allow a non-privileged user to run malicious code with privileged
authority.
II. CVSS
CVSS Base Score: 7.2
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/85617 for the
current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:L/AC:L/Au:N/C:C/I:C/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 devices.common.IBM.ib.rte
The following fileset levels are vulnerable:
AIX Fileset Lower Level Upper Level
-------------------------------------------------------
devices.common.IBM.ib.rte 6.1.6.0 6.1.6.21
devices.common.IBM.ib.rte 6.1.7.0 6.1.7.18
devices.common.IBM.ib.rte 6.1.8.0 6.1.8.15
devices.common.IBM.ib.rte 7.1.0.0 7.1.0.21
devices.common.IBM.ib.rte 7.1.1.0 7.1.1.18
devices.common.IBM.ib.rte 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
---------------------------------------------------
6.1.6 IV43582 08/16/13 SP12
6.1.7 IV43827 08/16/13 SP8
6.1.8 IV43580 08/16/13 SP3
7.1.0 IV43562 08/16/13 SP10
7.1.1 IV43756 08/16/13 SP8
7.1.2 IV43561 08/16/13 SP3
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV43582
http://www.ibm.com/support/docview.wss?uid=isg1IV43827
http://www.ibm.com/support/docview.wss?uid=isg1IV43580
http://www.ibm.com/support/docview.wss?uid=isg1IV43562
http://www.ibm.com/support/docview.wss?uid=isg1IV43756
http://www.ibm.com/support/docview.wss?uid=isg1IV43561
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/infiniband_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)
-------------------------------------------------------------------
6.1.6.11 iv43582mBa.130626.epkg.Z
6.1.7.7 iv43827m7a.130614.epkg.Z
6.1.8.2 iv43580m2a.130619.epkg.Z
7.1.0.9 iv43562m9.130626.epkg.Z
7.1.1.7 iv43756m7a.130612.epkg.Z
7.1.2.2 iv43561m2a.130626.epkg.Z
VIOS Level Interim Fix (*.Z)
-------------------------------------------------------------------
2.2.2.2-FP-26 SP-02 iv43580m2a.130619.epkg.Z
To extract the fixes from the tar file:
tar xvf infiniband_fix.tar
cd infiniband_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
------------------------------------------------------------------
0222cd18e3316f3d73f6d5150d4d672347427bb4 iv43582mBa.130626.epkg.Z
9a274ef45ecad62e20720cca84ea69f4eaaba78e iv43827m7a.130614.epkg.Z
50b92bdb5156b55f245f4ffacfae113dd65326fe iv43580m2a.130619.epkg.Z
89e393e74b1d3c49d2735773ca49337e9bfcd1f1 iv43562m9.130626.epkg.Z
d9b39fa210731957fdd72c003aa6b53cecc8af35 iv43756m7a.130612.epkg.Z
622f1676ae6cb5b00f4131fad4774014ab160d2a iv43561m2a.130626.epkg.Z
50b92bdb5156b55f245f4ffacfae113dd65326fe iv43580m2a.130619.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
security-alert@austin.ibm.com 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
Select one of the following:
----------------------------
1) Enabling PowerSC with DoD.xml profile will prevent this vulnerability.
2) Running aixpert with high-level security options (aixpert -l high)
3) Running aixpert with medium-level security options (aixpert -l medium)
4) Invoking fpm -l high to remove setuid and setgid permissions for high
level security.
5) Invoking fpm -l medium to remove setuid and setgid permissions that fall
into medium level security.
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:
security-alert@austin.ibm.com
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:
security-alert@austin.ibm.com
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:
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/85617
CVE-2013-4011: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4011
*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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