CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
34.2%
lsmcode_advisory2.asc: Version 5
Version 5 Issued: Fri Nov 11 08:21:26 CST 2016
Version 5 Changes: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require
a reboot.
IBM SECURITY ADVISORY
First Issued: Mon Oct 17 08:54:26 CDT 2016
|Updated: Fri Nov 11 08:21:26 CST 2016
|Update: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require a reboot.
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc
https://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc
ftp://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc
Security Bulletin: Vulnerability in lsmcode affects AIX (CVE-2016-3053)
===============================================================================
SUMMARY:
There is a vulnerability in lsmcode that impacts AIX.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2016-3053
https://vulners.com/cve/CVE-2016-3053
DESCRIPTION: IBM AIX contains an unspecified vulnerability that would
allow a locally authenticated user to obtain root level privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/114723 for more
information.
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
AFFECTED PRODUCTS AND VERSIONS:
AIX 6.1, 7.1, 7.2
VIOS 2.2.x
The following fileset levels are vulnerable:
key_fileset = aix
Fileset Lower Level Upper Level KEY
-----------------------------------------------------
bos.rte.shell 6.1.9.0 6.1.9.101 key_w_fs
bos.rte.libc 6.1.9.0 6.1.9.101 key_w_fs
bos.rte.shell 7.1.3.0 7.1.3.47 key_w_fs
bos.rte.libc 7.1.3.0 7.1.3.47 key_w_fs
bos.rte.shell 7.1.4.0 7.1.4.1 key_w_fs
bos.rte.libc 7.1.4.0 7.1.4.1 key_w_fs
bos.rte.shell 7.2.0.0 7.2.0.1 key_w_fs
bos.rte.libc 7.2.0.0 7.2.0.1 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.
Example: lslpp -L | grep -i bos.rte.shell
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
------------------------------------------------
6.1.9 IV87794 11/11/16 SP8 key_w_apar
7.1.3 IV88457 1/27/17 SP8 key_w_apar
7.1.4 IV88007 11/11/16 SP3 key_w_apar
7.2.0 IV88042 1/27/17 SP3 key_w_apar
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV87794
http://www.ibm.com/support/docview.wss?uid=isg1IV88457
http://www.ibm.com/support/docview.wss?uid=isg1IV88007
http://www.ibm.com/support/docview.wss?uid=isg1IV88042
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. A system reboot is recommended after
installing the iFixes.
The fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/security/lsmcode_fix2.tar
http://aix.software.ibm.com/aix/efixes/security/lsmcode_fix2.tar
https://aix.software.ibm.com/aix/efixes/security/lsmcode_fix2.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
----------------------------------------------
6.1.9.5 IV87794s5a.160913.epkg.Z key_w_fix
6.1.9.6 IV87794s6a.160912.epkg.Z key_w_fix
6.1.9.7 IV87794s7b.160822.epkg.Z key_w_fix
7.1.3.5 IV88457s5a.160912.epkg.Z key_w_fix
7.1.3.6 IV88457s6a.160912.epkg.Z key_w_fix
7.1.3.7 IV88457s7a.160822.epkg.Z key_w_fix
7.1.4.0 IV88007s0a.160913.epkg.Z key_w_fix
7.1.4.1 IV88007s0a.160913.epkg.Z key_w_fix
| 7.1.4.2 IV88007s2a.161110.epkg.Z key_w_fix
7.2.0.0 IV88042s0a.160914.epkg.Z key_w_fix
7.2.0.1 IV88042s0a.160914.epkg.Z key_w_fix
| 7.2.0.2 IV88042s2a.161110.epkg.Z key_w_fix
VIOS Level Interim Fix (*.Z) KEY
-----------------------------------------------
2.2.3.70 IV87794s7b.160822.epkg.Z key_w_fix
2.2.4.0 IV87794s6a.160912.epkg.Z key_w_fix
2.2.4.2x IV87794s7b.160822.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf lsmcode_fix2.tar
cd lsmcode_fix2
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
-----------------------------------------------------------------------------------------------------
cde88dbb526dae02a337a9e83cffed5c225cce1681bc4775bedca3a48e7ab74b IV87794s5a.160913.epkg.Z key_w_csum
bd4b02216d64a336b69eea32f0786fbba794b0a09f5a5e97be7c15c4349ee2c2 IV87794s6a.160912.epkg.Z key_w_csum
f964863f7342a29b5c565c9410ebf716808683e9565d3df8fd5cbca81a05393a IV87794s7b.160822.epkg.Z key_w_csum
eba6ef5f7df4df7b4e9cac20348933d6970b3876f896fc8c56705109f174f314 IV88007s0a.160913.epkg.Z key_w_csum
| 69045d861fbdad2849195353810fa6d882fca5d17a7173dc4a5dc516085a1ba5 IV88007s2a.161110.epkg.Z key_w_csum
fbd78c77dfb09bc9ca9126f70b00f9f52c5c702779cf5f54897d06bb7c8b92c6 IV88042s0a.160914.epkg.Z key_w_csum
| 7cfa923a2ed065817575d43aa25d7666e422565f258bc39c71ef53c6185c636b IV88042s2a.161110.epkg.Z key_w_csum
42f139b4ef8cc87fe61903e3bde0dcb33447bbd85774eec5a3c858edd5c964c7 IV88457s5a.160912.epkg.Z key_w_csum
9a8f09927b9f5b40857c01caf40d168d3a0792db4f3b22906189f3acb18300eb IV88457s6a.160912.epkg.Z key_w_csum
d6364b3447b2126dc533586d3df29e1c6dfe69443277146147d62fde85d688d7 IV88457s7a.160822.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 <pubkey_file> -signature <advisory_file>.sig <advisory_file>
openssl dgst -sha1 -verify <pubkey_file> -signature <ifix_file>.sig <ifix_file>
Published advisory OpenSSL signature file location:
http://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc.sig
https://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/lsmcode_advisory2.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.
===============================================================================
CONTACT US:
Note: Keywords labeled as KEY in this document are used for parsing
purposes.
If you would like to receive AIX Security Advisories via email,
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 v3 Guide: http://www.first.org/cvss/user-guide
On-line Calculator v3:
http://www.first.org/cvss/calculator/3.0
ACKNOWLEDGEMENTS:
Vulnerability research and notification provided by Rhino Security Labs.
CHANGE HISTORY:
First Issued: Mon Oct 17 08:54:26 CDT 2016
Updated: Wed Oct 19 09:35:27 CDT 2016
Update: Clarified that reboot after installation of the iFixes
is only recommended and not required.
Updated: Tue Nov 1 15:35:35 CDT 2016
Update: Updated the ACKNOWLEDGEMENTS section to appropriately
credit Rhino Security Labs.
Updated: Wed Nov 2 10:13:38 CDT 2016
Update: iFix information now provided for VIOS 2.2.3.70.
| Updated: Fri Nov 11 08:21:26 CST 2016
| Update: iFixes for AIX 7100-04-02 and 7200-00-02 no longer require a
| reboot.
===============================================================================
*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.
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
34.2%