CentOS ProjectPRINTERS_ADVISORY.ASCAIX is vulnerable to privilege escalation and denial of service
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
7.9 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
IBM SECURITY ADVISORY
First Issued: Mon Dec 11 13:23:17 CST 2023
|Updated: Fri Feb 2 13:43:05 CST 2024
|Update: New iFixes are available. The new iFixes resolve a technical issue
| with print queue status. Both sets of iFixes (new and original) resolve
| the security vulnerabilities described in the bulletin. The new iFixes are
| only needed if you experience the technical issue described here:
| https://www.ibm.com/support/pages/apar/IJ49737
The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/security/printers_advisory.asc
Security Bulletin: AIX is vulnerable to privilege escalation and denial
of service (CVE-2023-45166, CVE-2023-45174, CVE-2023-45170)
===============================================================================
SUMMARY:
A vulnerability in the AIX printers system could allow a non-privileged
local user to obtain elevated privileges or cause a denial of service
(CVE-2023-45166, CVE-2023-45174, CVE-2023-45170).
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2023-45166
https://vulners.com/cve/CVE-2023-45166
DESCRIPTION: IBM AIX could allow a non-privileged local user to exploit a
vulnerability in the piodmgrsu command to obtain elevated privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/267964
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)
CVEID: CVE-2023-45174
https://vulners.com/cve/CVE-2023-45174
DESCRIPTION: IBM AIX could allow a privileged local user to exploit a
vulnerability in the qdaemon command to escalate privileges or cause
a denial of service.
CVSS Base Score: 8.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/267972
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)
CVEID: CVE-2023-45170
https://vulners.com/cve/CVE-2023-45170
DESCRIPTION: IBM AIX could allow a non-privileged local user to exploit a
vulnerability in the piobe command to escalate privileges or cause a
denial of service.
CVSS Base Score: 8.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/267968
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 7.2, 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.printers 7.2.5.0 7.2.5.101 key_w_fs
printers.rte 7.2.4.0 7.2.4.0 key_w_fs
bos.rte.printers 7.2.5.200 7.2.5.201 key_w_fs
printers.rte 7.2.5.200 7.2.5.201 key_w_fs
bos.rte.printers 7.3.0.0 7.3.0.2 key_w_fs
printers.rte 7.3.0.0 7.3.0.2 key_w_fs
bos.rte.printers 7.3.1.0 7.3.1.1 key_w_fs
printers.rte 7.3.1.0 7.3.1.1 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.printers
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
-----------------------------------------------------
7.2.5 IJ48481 ** SP07 key_w_apar
7.3.0 IJ48784 ** N/A key_w_apar
7.3.1 IJ48539 ** SP03 key_w_apar
VIOS Level APAR Availability SP KEY
-----------------------------------------------------
3.1.3 IJ49461 ** N/A key_w_apar
3.1.4 IJ48481 ** 3.1.4.30 key_w_apar
Subscribe to the APARs here:
https://www.ibm.com/support/pages/apar/[APAR Number]
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.
AIX and VIOS fixes are available.
The AIX and VIOS fixes can be downloaded via https from:
https://aix.software.ibm.com/aix/efixes/security/printers_fix.tar
The fixes are cumulative and address the previously issued
AIX/VIOS lpd security bulletin with respect to SP and TL:
https://aix.software.ibm.com/aix/efixes/security/lpd_advisory3.asc
https://www.ibm.com/support/pages/node/6848309
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
----------------------------------------------
| 7.2.5.5 IJ48481m5b.240202.epkg.Z key_w_fix
| 7.2.5.6 IJ48481m6b.240130.epkg.Z key_w_fix
| 7.3.0.2 IJ48784m2b.240202.epkg.Z key_w_fix
| 7.3.0.3 IJ48784m3b.240202.epkg.Z key_w_fix
| 7.3.0.4 IJ48784m4b.240202.epkg.Z key_w_fix
| 7.3.1.1 IJ48539m1b.240202.epkg.Z key_w_fix
| 7.3.1.2 IJ48539m2b.240202.epkg.Z key_w_fix
Please note that the above table refers to AIX TL/SP level as
opposed to fileset level, i.e., 7.2.5.6 is AIX 7200-05-06.
VIOS Level Interim Fix (*.Z) KEY
-----------------------------------------------
| 3.1.3.21 IJ49461m2c.240202.epkg.Z key_w_fix
| 3.1.3.30 IJ49461m4b.240202.epkg.Z key_w_fix
| 3.1.3.40 IJ49461m4b.240202.epkg.Z key_w_fix
| 3.1.4.10 IJ48481m5b.240202.epkg.Z key_w_fix
| 3.1.4.21 IJ48481m6b.240130.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf printers_fix.tar
cd printers_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
-----------------------------------------------------------------------------------------------------
| 98812360ee802af2f3a25de73479067448cd7dc1bc6887e06d5cafdf3f849c4e IJ48481m5b.240202.epkg.Z key_w_csum
| 65890606ee3e3875b1a95be42d14b3a59902e6334fba8997b6e7a0ee8711639b IJ48481m6b.240130.epkg.Z key_w_csum
| 4a02bb76376d93fc58fd949a76fa6755caf565af6e463a138c9e92c0293d7adc IJ48539m1b.240202.epkg.Z key_w_csum
| 18fa726f0d834d10536b65b8a069e92d7a6199eff7b55d2b63137d774108e6a4 IJ48539m2b.240202.epkg.Z key_w_csum
| cc47a71127679358c350b6e2368011dca79d0686ad30950814d976241ae514a1 IJ48784m2b.240202.epkg.Z key_w_csum
| 84a9ae6d1971068df76426dfe09c3bf00c9d10681fc2765419de1fd5e03fa4d9 IJ48784m3b.240202.epkg.Z key_w_csum
| fdfc6f793040e464b4a98c1c51b74274e038d94aaaa897ae7f63202a238a3e63 IJ48784m4b.240202.epkg.Z key_w_csum
| 9a53515a417ea5d9c45989fe295ee653120e8e080c161aff947779f89ec195d9 IJ49461m2c.240202.epkg.Z key_w_csum
| 82e651eb0b23de993d71a2d703e6a264352ad2c6de5a3c4956c60af1124b0f89 IJ49461m4b.240202.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:
https://aix.software.ibm.com/aix/efixes/security/printers_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:
https://www.ibm.com/support/pages/managing-interim-fixes-aix
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
Contact IBM Support for questions related to this announcement:
https://ibm.com/support/
For information on how to securely verify AIX security bulletins and fixes:
https://www.ibm.com/support/pages/node/6985269
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
https://aix.software.ibm.com/aix/efixes/security/systems_p_os_aix_security_pubkey.txt
To verify the AIX/VIOS security bulletin:
Published advisory OpenSSL signature file location:
https://aix.software.ibm.com/aix/efixes/security/printers_advisory.asc.sig
openssl dgst -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file]
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 vulnerable to privilege escalation and denial
of service (CVE-2023-45166, CVE-2023-45174, CVE-2023-45170)
https://www.ibm.com/support/pages/node/7095022
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Mon Dec 11 13:23:17 CST 2023
| Updated: Fri Feb 2 13:43:05 CST 2024
| Update: New iFixes are available. The new iFixes resolve a technical issue
| with print queue status. Both sets of iFixes (new and original) resolve
| the security vulnerabilities described in the bulletin. The new iFixes are
| only needed if you experience the technical issue described here:
| https://www.ibm.com/support/pages/apar/IJ49737
===============================================================================
*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
7.9 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%