CentOS ProjectSENDMAIL_ADVISORY3.ASCVulnerability in sendmail impacts AIX (CVE-2014-3956),Vulnerability in sendmail impacts VIOS (CVE-2014-3956)
0.0004 Low
EPSS
Percentile
9.8%
IBM SECURITY ADVISORY
First Issued: Fri Apr 6 11:18:40 CDT 2018
|Updated: Mon Sep 17 09:18:47 CDT 2018
|Update: Clarified that AIX 7.2 TL0 SP6 and bos.net.tcp.sendmail fileset level
| 7.2.0.3 are impacted. An iFix for AIX 7.2 TL0 SP6 is now available.
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/sendmail_advisory3.asc
https://aix.software.ibm.com/aix/efixes/security/sendmail_advisory3.asc
ftp://aix.software.ibm.com/aix/efixes/security/sendmail_advisory3.asc
Security Bulletin: Vulnerability in sendmail impacts AIX (CVE-2014-3956)
===============================================================================
SUMMARY:
There is a vulnerability in sendmail that impacts AIX.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2014-3956
https://vulners.com/cve/CVE-2014-3956
https://vulners.com/cve/CVE-2014-3956
DESCRIPTION: The sm_close_on_exec function in conf.c in sendmail before
8.14.9 has arguments in the wrong order, and consequently skips
setting expected FD_CLOEXEC flags, which allows local users to access
unintended high-numbered file descriptors via a custom mail-delivery
program.
CVSS Base Score: 2.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/93592 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:P/A:N)
AFFECTED PRODUCTS AND VERSIONS:
AIX 5.3, 6.1, 7.1, 7.2
VIOS 2.2
The following fileset levels are vulnerable:
key_fileset = aix
Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.net.tcp.client 5.3.12.0 5.3.12.10 key_w_fs
bos.net.tcp.server 5.3.12.0 5.3.12.6 key_w_fs
bos.net.tcp.client 6.1.9.0 6.1.9.315 key_w_fs
bos.net.tcp.client 7.1.4.0 7.1.4.32 key_w_fs
bos.net.tcp.client 7.1.5.0 7.1.5.15 key_w_fs
| bos.net.tcp.sendmail 7.2.0.0 7.2.0.3 key_w_fs
bos.net.tcp.sendmail 7.2.1.0 7.2.1.1 key_w_fs
bos.net.tcp.sendmail 7.2.2.0 7.2.2.15 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.
Example: lslpp -L | grep -i bos.net.tcp.client
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
------------------------------------------------
5.3.12 IJ03273 ** N/A key_w_apar
6.1.9 IJ02915 ** SP12 key_w_apar
7.1.4 IJ02917 ** SP7 key_w_apar
7.1.5 IJ03121 ** SP4 key_w_apar
| 7.2.0 IJ02918 ** N/A key_w_apar
7.2.1 IJ02919 ** SP5 key_w_apar
7.2.2 IJ02920 ** SP3 key_w_apar
VIOS Level APAR Availability SP
-----------------------------------------
2.2.4 IJ02915 ** N/A
2.2.5 IJ02915 ** 2.2.5.50
2.2.6 IJ02915 ** 2.2.6.30
** Please refer to AIX support lifecycle information page for
availability of Service Packs:
http://www-01.ibm.com/support/docview.wss?uid=isg3T1012517
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IJ03273
http://www.ibm.com/support/docview.wss?uid=isg1IJ02915
http://www.ibm.com/support/docview.wss?uid=isg1IJ02917
http://www.ibm.com/support/docview.wss?uid=isg1IJ03121
http://www.ibm.com/support/docview.wss?uid=isg1IJ02918
http://www.ibm.com/support/docview.wss?uid=isg1IJ02919
http://www.ibm.com/support/docview.wss?uid=isg1IJ02920
https://www.ibm.com/support/docview.wss?uid=isg1IJ03273
https://www.ibm.com/support/docview.wss?uid=isg1IJ02915
https://www.ibm.com/support/docview.wss?uid=isg1IJ02917
https://www.ibm.com/support/docview.wss?uid=isg1IJ03121
https://www.ibm.com/support/docview.wss?uid=isg1IJ02918
https://www.ibm.com/support/docview.wss?uid=isg1IJ02919
https://www.ibm.com/support/docview.wss?uid=isg1IJ02920
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 or http from:
ftp://aix.software.ibm.com/aix/efixes/security/sendmail_fix3.tar
http://aix.software.ibm.com/aix/efixes/security/sendmail_fix3.tar
https://aix.software.ibm.com/aix/efixes/security/sendmail_fix3.tar
The links above are 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.
Please note that the below table refers to AIX TL/SP level as
opposed to fileset level, i.e., 7.1.4.5 is AIX 7100-04-05.
AIX Level Interim Fix (*.Z) KEY
----------------------------------------------
5.3.12.9 IJ03273s9a.180116.epkg.Z key_w_fix
6.1.9.9 IJ02915s9a.180110.epkg.Z key_w_fix
6.1.9.10 IJ02915s9a.180110.epkg.Z key_w_fix
6.1.9.11 IJ02915s9a.180110.epkg.Z key_w_fix
7.1.4.3 IJ02917s3a.180105.epkg.Z key_w_fix
7.1.4.4 IJ02917s3a.180105.epkg.Z key_w_fix
7.1.4.5 IJ02917s3a.180105.epkg.Z key_w_fix
7.1.5.0 IJ03121s0a.180110.epkg.Z key_w_fix
7.1.5.1 IJ03121s0a.180110.epkg.Z key_w_fix
7.1.5.2 IJ03121s0a.180110.epkg.Z key_w_fix
7.2.0.3 IJ02918s3a.180108.epkg.Z key_w_fix
7.2.0.4 IJ02918s3a.180108.epkg.Z key_w_fix
7.2.0.5 IJ02918s3a.180108.epkg.Z key_w_fix
| 7.2.0.6 IJ02918sp6.180913.epkg.Z key_w_fix
7.2.1.1 IJ02919s1a.180108.epkg.Z key_w_fix
7.2.1.2 IJ02919s1a.180108.epkg.Z key_w_fix
7.2.1.3 IJ02919s1a.180108.epkg.Z key_w_fix
7.2.2.0 IJ02920s0a.180110.epkg.Z key_w_fix
7.2.2.1 IJ02920s0a.180110.epkg.Z key_w_fix
7.2.2.2 IJ02920s0a.180110.epkg.Z key_w_fix
VIOS Level Interim Fix (*.Z) KEY
-----------------------------------------------
2.2.4.40 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.4.50 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.5.20 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.5.30 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.6.10 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.6.20 IJ02915s9a.180110.epkg.Z key_w_fix
2.2.6.21 IJ02915s9a.180110.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf sendmail_fix3.tar
cd sendmail_fix3
Verify you have retrieved the fixes intact:
The checksums below were generated using the
"openssl dgst -sha256 [filename]" command as the following:
openssl dgst -sha256 filename KEY
-----------------------------------------------------------------------------------------------------
2987f7b0b4c549c958f6919974adf104452f9179a4e004c5f862d2473e751dfc IJ02915s9a.180110.epkg.Z key_w_csum
fbb7fc0fcbb30d6ccd2e1761c4682cf7e0252aeb64e60493e12d48f6c44510b0 IJ02917s3a.180105.epkg.Z key_w_csum
a0e3e1fbf9f7015ef72ffe181c7995862fb9f52d901ae3d7b0e8a98ae0af7994 IJ02918s3a.180108.epkg.Z key_w_csum
| 9bbc538083702bd8bc574560d09b07c8dc061e07a14329dc1e6759ccba516f9c IJ02918sp6.180913.epkg.Z key_w_csum
bb2c7189784b734808aa637cf7ecfec5bd816cb42d9e5d812ac8e09abba6299d IJ02919s1a.180108.epkg.Z key_w_csum
4a907f461a36a1a63941b0cca8992b366d71197f7d47c63e425d5614ac072157 IJ02920s0a.180110.epkg.Z key_w_csum
4d95acdd312b233cedb5e106dfcdb8ac2266a11c402837545ea4963f929e7515 IJ03121s0a.180110.epkg.Z key_w_csum
6663891d15e91f5f316e4f73c2a7e0d23dca31df2508e98cd0cc06bb227da55b IJ03273s9a.180116.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 Support at
http://ibm.com/support/ 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/sendmail_advisory3.asc.sig
https://aix.software.ibm.com/aix/efixes/security/sendmail_advisory3.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/sendmail_advisory3.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
https://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html
To preview an interim fix installation:
emgr -e epkg_name -p # where epkg_name is the name of the
# interim fix package being previewed.
To install an interim fix package:
emgr -e epkg_name -X # where epkg_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
https://www.ibm.com/support/mynotifications
To view previously issued advisories, please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
https://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
Contact IBM Support for questions related to this announcement:
http://ibm.com/support/
https://ibm.com/support/
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
https://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt
Please contact your local IBM AIX support center for any
assistance.
REFERENCES:
Complete CVSS v3 Guide:
http://www.first.org/cvss/user-guide
https://www.first.org/cvss/user-guide
On-line Calculator v3:
http://www.first.org/cvss/calculator/3.0
https://www.first.org/cvss/calculator/3.0
RELATED INFORMATION:
Security Bulletin: Vulnerability in sendmail impacts AIX
(CVE-2014-3956)
http://www-01.ibm.com/support/docview.wss?uid=isg3T1027341
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Fri Apr 6 11:18:40 CDT 2018
| Updated: Mon Sep 17 09:18:47 CDT 2018
| Update: Clarified that AIX 7.2 TL0 SP6 and bos.net.tcp.sendmail fileset
| level 7.2.0.3 are impacted. An iFix for AIX 7.2 TL0 SP6 is now
| available.
===============================================================================
*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.
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