CentOS ProjectNIMSH_ADVISORY.ASCThere is a vulnerability in the AIX nimsh daemon for VIOS.,There is a vulnerability in the AIX nimsh daemon.
7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
8.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
35.4%
IBM SECURITY ADVISORY
First Issued: Fri Mar 4 08:54:35 CST 2022
|Updated: Thu Mar 24 15:53:49 CDT 2022
|Update: New iFixes provided for all levels. The new iFixes resolve a
| technical failure with the previous iFixes when running NIM commands
| of extended length, resulting in a /var/adm/ras/nimsh.log error
| message similar to:
| error: command not allowed. Please verify NIM command
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc
https://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc
Security Bulletin: Vulnerability in AIX nimsh (CVE-2022-22351)
===============================================================================
SUMMARY:
There is a vulnerability in the AIX nimsh daemon.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2022-22351
https://vulners.com/cve/CVE-2022-22351
https://vulners.com/cve/CVE-2022-22351
DESCRIPTION: IBM AIX could allow a non-privileged trusted host user to
exploit a vulnerability in the nimsh daemon to cause a denial of
service in the nimsh daemon on another trusted host.
CVSS Base Score: 6.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/220396
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H)
AFFECTED PRODUCTS AND VERSIONS:
AIX 7.1, 7.2, 7.3
VIOS 3.1
The vulnerabilities in the following filesets are being addressed:
key_fileset = aix
Fileset Lower Level Upper Level KEY
---------------------------------------------------------
bos.sysmgt.nim.client 7.1.5.0 7.1.5.37 key_w_fs
bos.sysmgt.nim.client 7.2.4.0 7.2.4.4 key_w_fs
bos.sysmgt.nim.client 7.2.5.0 7.2.5.1 key_w_fs
bos.sysmgt.nim.client 7.2.5.100 7.2.5.100 key_w_fs
bos.sysmgt.nim.client 7.3.0.0 7.3.0.0 key_w_fs
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.sysmgt.nim.client
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
-----------------------------------------------------
7.1.5 IJ37419 ** SP10 key_w_apar
7.2.4 IJ37705 ** SP06 key_w_apar
7.2.5 IJ36681 ** SP04 key_w_apar
7.3.0 IJ36593 ** SP02 key_w_apar
VIOS Level APAR Availability SP KEY
----------------------------------------------------
3.1.1 IJ37705 ** 3.1.1.60 key_w_apar
3.1.2 IJ37706 ** 3.1.2.40 key_w_apar
3.1.3 IJ36681 ** 3.1.3.20 key_w_apar
Subscribe to the APARs here:
http://www.ibm.com/support/pages/apar/IJ36593
http://www.ibm.com/support/pages/apar/IJ36681
http://www.ibm.com/support/pages/apar/IJ37419
http://www.ibm.com/support/pages/apar/IJ37705
http://www.ibm.com/support/pages/apar/IJ37706
https://www.ibm.com/support/pages/apar/IJ36593
https://www.ibm.com/support/pages/apar/IJ36681
https://www.ibm.com/support/pages/apar/IJ37419
https://www.ibm.com/support/pages/apar/IJ37705
https://www.ibm.com/support/pages/apar/IJ37706
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
AIX and VIOS fixes are available.
The AIX and VIOS fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/security/nimsh_fix.tar
http://aix.software.ibm.com/aix/efixes/security/nimsh_fix.tar
https://aix.software.ibm.com/aix/efixes/security/nimsh_fix.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
----------------------------------------------
| 7.1.5.7 IJ37419m9a.220324.epkg.Z key_w_fix
| 7.1.5.8 IJ37419m9a.220324.epkg.Z key_w_fix
| 7.1.5.9 IJ37419m9a.220324.epkg.Z key_w_fix
| 7.2.4.3 IJ37705m4a.220324.epkg.Z key_w_fix
| 7.2.4.4 IJ37705m4a.220324.epkg.Z key_w_fix
| 7.2.4.5 IJ37705m5a.220324.epkg.Z key_w_fix
| 7.2.5.1 IJ37706m2a.220324.epkg.Z key_w_fix
| 7.2.5.2 IJ37706m2a.220324.epkg.Z key_w_fix
| 7.2.5.3 IJ36681m3a.220324.epkg.Z key_w_fix
| 7.3.0.1 IJ36593m1a.220324.epkg.Z key_w_fix
Please note that the above table refers to AIX TL/SP level as
opposed to fileset level, i.e., 7.2.5.2 is AIX 7200-05-02.
Please reference the Affected Products and Version section above
for help with checking installed fileset levels.
VIOS Level Interim Fix (*.Z) KEY
-----------------------------------------------
| 3.1.1.30 IJ37705m4a.220324.epkg.Z key_w_fix
| 3.1.1.40 IJ37705m4a.220324.epkg.Z key_w_fix
| 3.1.1.50 IJ37705m5a.220324.epkg.Z key_w_fix
| 3.1.2.10 IJ37706m2a.220324.epkg.Z key_w_fix
| 3.1.2.21 IJ37706m2a.220324.epkg.Z key_w_fix
| 3.1.3.10 IJ36681m3a.220324.epkg.Z key_w_fix
| 3.1.3.14 IJ36681m3a.220324.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf nimsh_fix.tar
cd nimsh_fix
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
-----------------------------------------------------------------------------------------------------
| 7b0c82481aa7e93dab6ec60a3723ee88d63de7a339eb1e10366e71009fe5cf64 IJ36593m1a.220324.epkg.Z key_w_csum
| 98cc59b5bb5947a7f8d29ee87742ac094117844cb5b309c2b5a5d2378b727687 IJ36681m3a.220324.epkg.Z key_w_csum
| 71d81e4e864e387413eb7a5421fe796f9afa3031cc413758278e093d88be7832 IJ37419m9a.220324.epkg.Z key_w_csum
| 6efae17ca82b02385cf44458a79535416d4f242debbccb63eb217c96e1ebd746 IJ37705m4a.220324.epkg.Z key_w_csum
| fb9c4a622a7c39ab2ddeeac2cf70ae71c9653c7cb9417cea120791803bd2426d IJ37705m5a.220324.epkg.Z key_w_csum
| f6fefdf2a94ffeb0362fc54d7e61f60e4ad5412ac7e651a2ee23ffc644b5e2a0 IJ37706m2a.220324.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 -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file]
openssl dgst -sha256 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file]
Published advisory OpenSSL signature file location:
http://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc.sig
https://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/nimsh_advisory.asc.sig
C. FIX AND INTERIM FIX INSTALLATION
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
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:
ftp://ftp.software.ibm.com/systems/power/AIX/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
On-line Calculator v3:
http://www.first.org/cvss/calculator/3.0
RELATED INFORMATION:
IBM Secure Engineering Web Portal
http://www.ibm.com/security/secure-engineering/bulletins.html
IBM Product Security Incident Response Blog
https://www.ibm.com/blogs/psirt/
Security Bulletin: Vulnerability in AIX nimsh (CVE-2022-22351)
https://www.ibm.com/support/pages/node/6561275
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Fri Mar 4 08:54:35 CST 2022
| Updated: Thu Mar 24 15:53:49 CDT 2022
| Update: New iFixes provided for all levels. The new iFixes resolve a
| technical failure with the previous iFixes when running NIM commands
| of extended length, resulting in a /var/adm/ras/nimsh.log error
| message similar to:
| error: command not allowed. Please verify NIM command
===============================================================================
*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.
Related
7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
8.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
35.4%