CentOS ProjectRMMLCACHE_ADVISORY.ASCAIX is affected by a root privilege escalation vulnerability
8.4 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
19.6%
IBM SECURITY ADVISORY
First Issued: Wed Dec 14 08:27:58 CST 2022
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/rmmlcache_advisory.asc
https://aix.software.ibm.com/aix/efixes/security/rmmlcache_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/rmmlcache_advisory.asc
Security Bulletin: AIX is affected by a root privilege escalation
vulnerability (CVE-2022-41290)
===============================================================================
SUMMARY:
A vulnerability in the AIX rm_mlcache_file user command could allow a
non-privileged local user to obtain root privileges (CVE-2022-41290).
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2022-41290
https://vulners.com/cve/CVE-2022-41290
https://vulners.com/cve/CVE-2022-41290
DESCRIPTION: IBM AIX could allow a non-privileged local user to exploit
a vulnerability in the rm_mlcache_file command to obtain root
privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/236690
for the current score
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 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.rte.install 7.1.5.0 7.1.5.48 key_w_fs
bos.rte.install 7.2.5.0 7.2.5.5 key_w_fs
bos.rte.install 7.2.5.100 7.2.5.105 key_w_fs
bos.rte.install 7.3.0.0 7.3.0.3 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.rte.install
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
-----------------------------------------------------
7.1.5 IJ42230 ** SP11 key_w_apar
7.2.5 IJ42163 ** SP05 key_w_apar
7.3.0 IJ42234 ** SP03 key_w_apar
VIOS Level APAR Availability SP KEY
----------------------------------------------------
3.1.2 IJ42232 ** 3.1.2.50 key_w_apar
3.1.3 IJ42163 ** 3.1.3.30 key_w_apar
Subscribe to the APARs here:
https://www.ibm.com/support/pages/apar/IJ42163
https://www.ibm.com/support/pages/apar/IJ42230
https://www.ibm.com/support/pages/apar/IJ42232
https://www.ibm.com/support/pages/apar/IJ42234
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
IBM strongly recommends addressing the vulnerability now.
The AIX and VIOS fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/security/rmmlcache_fix.tar
http://aix.software.ibm.com/aix/efixes/security/rmmlcache_fix.tar
https://aix.software.ibm.com/aix/efixes/security/rmmlcache_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
----------------------------------------------
7.1.5.8 IJ42230mAa.221208.epkg.Z key_w_fix
7.1.5.9 IJ42230mAa.221208.epkg.Z key_w_fix
7.1.5.10 IJ42230mAa.221208.epkg.Z key_w_fix
7.2.5.3 IJ42163m4a.221213.epkg.Z key_w_fix
7.2.5.4 IJ42163m4a.221213.epkg.Z key_w_fix
7.3.0.1 IJ42234m2a.221213.epkg.Z key_w_fix
7.3.0.2 IJ42234m2a.221213.epkg.Z key_w_fix
Please note that the above table refers to AIX TL/SP level as
opposed to fileset level, i.e., 7.2.5.4 is AIX 7200-05-04.
Please reference the Affected Products and Version section above
for help with checking installed fileset levels.
VIOS Level Interim Fix (*.Z) KEY
-----------------------------------------------
3.1.2.21 IJ42232m2a.221213.epkg.Z key_w_fix
3.1.2.30 IJ42232m2a.221213.epkg.Z key_w_fix
3.1.2.40 IJ42232m2a.221213.epkg.Z key_w_fix
3.1.3.10 IJ42163m4a.221213.epkg.Z key_w_fix
3.1.3.14 IJ42163m4a.221213.epkg.Z key_w_fix
3.1.3.21 IJ42163m4a.221213.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf rmmlcache_fix.tar
cd rmmlcache_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
-----------------------------------------------------------------------------------------------------
151660fafedd0bf43da9579f272cf01fa4435ae6d58a118d9628a91f1dbdfc49 IJ42163m4a.221213.epkg.Z key_w_csum
09f08f7976bb940137be2cf67362481e1b9d892b8ab02e94464fdcbd4be49e00 IJ42230mAa.221208.epkg.Z key_w_csum
9ae3e496e4017b98ff10327ad03778c45e0402a8024c33f257754a8f2bf0aaf8 IJ42232m2a.221213.epkg.Z key_w_csum
8c3a1e7a9dbb76c005158184b88fffa07b16cf3f001565578f7690fb599d9a72 IJ42234m2a.221213.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/rmmlcache_advisory.asc.sig
https://aix.software.ibm.com/aix/efixes/security/rmmlcache_advisory.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/rmmlcache_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: AIX is affected by a root privilege escalation
vulnerability (CVE-2022-41290)
https://www.ibm.com/support/pages/node/6847917
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Wed Dec 14 08:27:58 CST 2022
===============================================================================
*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
8.4 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
19.6%