CentOS ProjectLPD_ADVISORY2.ASCAIX is vulnerable to a denial of service due to lpd
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.0004 Low
EPSS
Percentile
5.1%
IBM SECURITY ADVISORY
First Issued: Tue Jun 14 14:27:45 CDT 2022
|Updated: Tue Sep 13 13:16:19 CDT 2022
|Update: Added iFix information for 7.1 TL5 SP10 and 7.2 TL4 SP6.
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/lpd_advisory2.asc
https://aix.software.ibm.com/aix/efixes/security/lpd_advisory2.asc
ftp://aix.software.ibm.com/aix/efixes/security/lpd_advisory2.asc
Security Bulletin: AIX is vulnerable to a denial of service due to lpd
(CVE-2022-22444)
===============================================================================
SUMMARY:
A vulnerability in the AIX lpd printer daemon could allow a local user
with elevated privileges to cause a denial of service (CVE-2022-22444).
The lpd daemon is the remote print server on AIX.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2022-22444
https://vulners.com/cve/CVE-2022-22444
https://vulners.com/cve/CVE-2022-22444
DESCRIPTION: IBM AIX could allow a local user to exploit a vulnerability
in the lpd daemon to cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/224444
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
AFFECTED PRODUCTS AND VERSIONS:
AIX 7.1, 7.2, 7.3
VIOS 3.1
The following fileset levels are vulnerable:
key_fileset = aix
Fileset Lower Level Upper Level KEY
---------------------------------------------------------
bos.rte.printers 7.1.5.0 7.1.5.33 key_w_fs
bos.rte.printers 7.2.4.0 7.2.4.1 key_w_fs
bos.rte.printers 7.2.5.0 7.2.5.1 key_w_fs
bos.rte.printers 7.2.5.100 7.2.5.100 key_w_fs
bos.rte.printers 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 the 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
-----------------------------------------------------
7.1.5 IJ39868 ** SP11 key_w_apar
7.2.4 IJ39875 ** N/A key_w_apar
7.2.5 IJ39876 ** SP05 key_w_apar
7.3.0 IJ39877 ** SP03 key_w_apar
VIOS Level APAR Availability SP KEY
----------------------------------------------------
3.1.1 IJ39875 ** N/A key_w_apar
3.1.2 IJ39878 ** 3.1.2.50 key_w_apar
3.1.3 IJ39876 ** 3.1.3.30 key_w_apar
Subscribe to the APARs here:
http://www.ibm.com/support/pages/apar/IJ39868
http://www.ibm.com/support/pages/apar/IJ39875
http://www.ibm.com/support/pages/apar/IJ39876
http://www.ibm.com/support/pages/apar/IJ39877
http://www.ibm.com/support/pages/apar/IJ39878
https://www.ibm.com/support/pages/apar/IJ39868
https://www.ibm.com/support/pages/apar/IJ39875
https://www.ibm.com/support/pages/apar/IJ39876
https://www.ibm.com/support/pages/apar/IJ39877
https://www.ibm.com/support/pages/apar/IJ39878
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 fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/security/lpd_fix2.tar
http://aix.software.ibm.com/aix/efixes/security/lpd_fix2.tar
https://aix.software.ibm.com/aix/efixes/security/lpd_fix2.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.
AIX Level Interim Fix (*.Z) KEY
----------------------------------------------
7.1.5.7 IJ39868s9a.220506.epkg.Z key_w_fix
7.1.5.8 IJ39868s9a.220506.epkg.Z key_w_fix
7.1.5.9 IJ39868s9a.220506.epkg.Z key_w_fix
| 7.1.5.10 IJ39868s9a.220506.epkg.Z key_w_fix
7.2.4.3 IJ39875s5a.220506.epkg.Z key_w_fix
7.2.4.4 IJ39875s5a.220506.epkg.Z key_w_fix
7.2.4.5 IJ39875s5a.220506.epkg.Z key_w_fix
| 7.2.4.6 IJ39875s5a.220506.epkg.Z key_w_fix
7.2.5.1 IJ39878s2a.220506.epkg.Z key_w_fix
7.2.5.2 IJ39878s2a.220506.epkg.Z key_w_fix
7.2.5.3 IJ39876s3a.220506.epkg.Z key_w_fix
7.2.5.4 IJ39876s3a.220506.epkg.Z key_w_fix
7.3.0.1 IJ39877s1a.220506.epkg.Z key_w_fix
7.3.0.2 IJ39877s1a.220506.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 IJ39875s5a.220506.epkg.Z key_w_fix
3.1.1.40 IJ39875s5a.220506.epkg.Z key_w_fix
3.1.1.50 IJ39875s5a.220506.epkg.Z key_w_fix
3.1.2.10 IJ39878s2a.220506.epkg.Z key_w_fix
3.1.2.21 IJ39878s2a.220506.epkg.Z key_w_fix
3.1.3.10 IJ39876s3a.220506.epkg.Z key_w_fix
3.1.3.14 IJ39876s3a.220506.epkg.Z key_w_fix
3.1.3.21 IJ39876s3a.220506.epkg.Z key_w_fix
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_advisory.asc
https://www.ibm.com/support/pages/node/6467129
To extract the fixes from the tar file:
tar xvf lpd_fix2.tar
cd lpd_fix2
Verify you have retrieved the fixes intact:
The checksums below were generated using the
"openssl dgst -sha256 [file]" command as the following:
openssl dgst -sha256 filename KEY
-----------------------------------------------------------------------------------------------------
fd40be548a713f51b98071baeb9cb93926b35a0cf88c9f0745ae244491bddb19 IJ39868s9a.220506.epkg.Z key_w_csum
f4fc2b2abcb42a6b300ab60ee74ed3aae1ebfc8099feb76e3fbdcbefc2499ff7 IJ39875s5a.220506.epkg.Z key_w_csum
e5e36e1cb37f18a65f123d1ed4b32b6d160d5ef3ae9feb387f856019a0a4d58e IJ39876s3a.220506.epkg.Z key_w_csum
dca78408a41d7d963555cd58dbbb206a3bc0edb20bb90f93aae62d6fe408a888 IJ39877s1a.220506.epkg.Z key_w_csum
e0d4d6c095c36c32bc65bb8c2183f9826a36a1467d26c1e455408a50f91e9a7b IJ39878s2a.220506.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 Support at
https://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/lpd_advisory2.asc.sig
https://aix.software.ibm.com/aix/efixes/security/lpd_advisory2.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/lpd_advisory2.asc.sig
C. FIX AND INTERIM FIX INSTALLATION
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
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:
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:
Review this information as needed, no action required.
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: AIX is vulnerable to a denial of service due to lpd
(CVE-2022-22444)
https://www.ibm.com/support/pages/node/6594859
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Tue Jun 14 14:27:45 CDT 2022
Updated: Fri Jun 17 09:00:14 CDT 2022
Update: Added iFix information for 7.2 TL5 SP4 and 7.3 TL0 SP1.
| Updated: Tue Sep 13 13:16:19 CDT 2022
| Update: Added iFix information for 7.1 TL5 SP10 and 7.2 TL4 SP6.
===============================================================================
*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
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.0004 Low
EPSS
Percentile
5.1%