CentOS ProjectBIND_ADVISORY22.ASCAIX is vulnerable to denial of service due to ISC BIND
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
75.3%
IBM SECURITY ADVISORY
First Issued: Thu Dec 22 10:28:36 CST 2022
|Updated: Wed May 17 11:19:24 CDT 2023
|Update: Corrected the affected fileset levels for AIX 7.2 TL5 and removed
| bos.net.tcp.bind 7.2.5.200.
The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/security/bind_advisory22.asc
Security Bulletin: AIX is vulnerable to denial of service due to ISC BIND
(CVE-2022-38178, CVE-2022-3080, CVE-2022-38177, CVE-2022-2795)
===============================================================================
SUMMARY:
A vulnerability in ISC BIND could allow a remote attacker to cause a
denial of service (CVE-2022-38178, CVE-2022-3080, CVE-2022-38177,
CVE-2022-2795). AIX uses ISC BIND as part of its DNS functions.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2022-38178
https://vulners.com/cve/CVE-2022-38178
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by a
memory leak in the DNSSEC verification code for the EdDSA algorithm.
By spoofing the target resolver with responses that have a malformed
EdDSA signature, a remote attacker could exploit this vulnerability
to cause named to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/236706
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2022-3080
https://vulners.com/cve/CVE-2022-3080
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by an
error when stale cache and stale answers are enabled, option
stale-answer-client-timeout is set to 0 and there is a stale CNAME in
the cache for an incoming query. By sending a specially-crafted
request, a remote attacker could exploit this vulnerability to cause
named to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/236704
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2022-38177
https://vulners.com/cve/CVE-2022-38177
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by a
small memory leak in the DNSSEC verification code for the ECDSA
algorithm. By spoofing the target resolver with responses that have a
malformed ECDSA signature, a remote attacker could exploit this
vulnerability to cause named to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/236705
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2022-2795
https://vulners.com/cve/CVE-2022-2795
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by a
flaw in resolver code. By flooding the target resolver with queries,
a remote attacker could exploit this vulnerability to severely
degrade the resolver's performance, effectively denying legitimate
clients access to the DNS resolution service.
CVSS Base Score: 5.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/236701
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
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.net.tcp.server 7.1.5.0 7.1.5.35 key_w_fs
| bos.net.tcp.client 7.1.5.0 7.1.5.42 key_w_fs
| bos.net.tcp.bind_utils 7.2.5.0 7.2.5.4 key_w_fs
| bos.net.tcp.bind_utils 7.2.5.100 7.2.5.102 key_w_fs
| bos.net.tcp.bind_utils 7.2.5.200 7.2.5.200 key_w_fs
| bos.net.tcp.bind_utils 7.3.0.0 7.3.0.2 key_w_fs
bind.rte 7.1.916.0 7.1.916.2600 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.net.tcp.server
REMEDIATION:
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR Availability SP KEY
-----------------------------------------------------
| 7.1.5 IJ44422 ** SP12 key_w_apar
7.2.5 IJ44425 ** SP06 key_w_apar
| 7.3.0 IJ44427 ** SP04 key_w_apar
7.3.1 IJ44426 ** SP02 key_w_apar
VIOS Level APAR Availability SP KEY
-----------------------------------------------------
| 3.1.2 IJ44423 ** 3.1.2.60 key_w_apar
| 3.1.3 IJ44424 ** 3.1.3.40 key_w_apar
3.1.4 IJ44425 ** 3.1.4.20 key_w_apar
Subscribe to the APARs here:
https://www.ibm.com/support/pages/apar/IJ44422
https://www.ibm.com/support/pages/apar/IJ44424
https://www.ibm.com/support/pages/apar/IJ44423
https://www.ibm.com/support/pages/apar/IJ44425
https://www.ibm.com/support/pages/apar/IJ44426
https://www.ibm.com/support/pages/apar/IJ44427
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 fixes are cumulative and
address previously issued AIX/VIOS BIND security bulletins with
respect to SP and TL.
The AIX and VIOS fixes can be downloaded via https from:
https://aix.software.ibm.com/aix/efixes/security/bind_fix22.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 IJ44422mAa.221220.epkg.Z key_w_fix
7.1.5.9 IJ44422mAa.221220.epkg.Z key_w_fix
7.1.5.10 IJ44422mAa.221220.epkg.Z key_w_fix
| 7.1.5.11 IJ44422sBa.230317.epkg.Z key_w_fix
| 7.2.5.3 IJ44425m4b.230217.epkg.Z key_w_fix
| 7.2.5.4 IJ44425m4b.230217.epkg.Z key_w_fix
| 7.2.5.5 IJ44425s5b.230214.epkg.Z key_w_fix
7.3.0.1 IJ44427m2a.221220.epkg.Z key_w_fix
7.3.0.2 IJ44427m2a.221220.epkg.Z key_w_fix
| 7.3.0.3 IJ44427s3a.230317.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 IJ44423m2b.230217.epkg.Z key_w_fix
| 3.1.2.30 IJ44423m2b.230217.epkg.Z key_w_fix
| 3.1.2.40 IJ44423m2b.230217.epkg.Z key_w_fix
| 3.1.2.50 IJ44423s5a.230404.epkg.Z key_w_fix
| 3.1.3.10 IJ44425m4b.230217.epkg.Z key_w_fix
| 3.1.3.14 IJ44425m4b.230217.epkg.Z key_w_fix
| 3.1.3.21 IJ44425m4b.230217.epkg.Z key_w_fix
| 3.1.3.30 IJ44424s3a.230404.epkg.Z key_w_fix
| 3.1.4.10 IJ44425s5b.230214.epkg.Z key_w_fix
For bind.rte on 7.3 TL1 and if installed on 7.2 TL5:
AIX Level Interim Fix (*.Z) KEY
----------------------------------------------
7.2.5 IJ44426s2.221130.epkg.Z key_w_fix
7.3.1 IJ44426s2.221130.epkg.Z key_w_fix
To extract the fixes from the tar file:
tar xvf bind_fix22.tar
cd bind_fix22
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
-----------------------------------------------------------------------------------------------------
d4c4f5597a935695bafffa5a9f31a17c694f003c0a01a3dc2d9d0ccfe06153a9 IJ44422mAa.221220.epkg.Z key_w_csum
| dc937745acdc4d7e3eec7ebd256f18bfce782ad1458eb439bf05e61367b2598d IJ44422sBa.230317.epkg.Z key_w_csum
| 70f95b035123da0b39350c88c57040725ee1f1421931be5354b5e4a56e446f96 IJ44423m2b.230217.epkg.Z key_w_csum
| 4dbd611880ec795916fdd80ee67c971d19d4887c3027a947cee787f44574b319 IJ44423s5a.230404.epkg.Z key_w_csum
| 50436dbd5b5cfa37efa361420af1638f1769a50011ee61e739990bb457f43952 IJ44424s3a.230404.epkg.Z key_w_csum
| 46f8fad10cb6bc6f611f9981f41992855702ec11725bb05379db77593459b7b3 IJ44425m4b.230217.epkg.Z key_w_csum
| 2245c6270194dddf66b5ba6dd7624921062910d07e6c80a61fdf82270489a3b3 IJ44425s5b.230214.epkg.Z key_w_csum
95bbb3346e950c4f920b30f016f2f6c60dbf87e27b9ae396a4c25dbd0e400573 IJ44426s2.221130.epkg.Z key_w_csum
648bd3bbedd6396f917de3deef892b04e3224c5ab40f9667ada4ef464698ccfb IJ44427m2a.221220.epkg.Z key_w_csum
| 64687c4d69d5ab4cc2c2bbe72f884bdc5dd0cf65a6d7cebf2f9f18cb877c973b IJ44427s3a.230317.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/bind_advisory22.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":
https://www.ibm.com/support/mynotifications
Contact IBM Support for questions related to this announcement:
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 vulnerable to denial of service due to ISC BIND
(CVE-2022-38178, CVE-2022-3080, CVE-2022-38177, CVE-2022-2795)
https://www.ibm.com/support/pages/node/6851445
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Thu Dec 22 10:28:36 CST 2022
| Updated: Wed Dec 28 16:08:48 CST 2022
| Update: Added fileset information for AIX 7.2 TL5 SP5.
| Updated: Wed Feb 22 09:05:51 CST 2023
| Update: New iFixes provided for AIX 7.2 TL5 and VIOS 3.1.
| The new iFixes are intended to replace the original iFixes due to a
| technical issue that could cause named to core dump.
| Updated: Wed Apr 5 11:27:13 CDT 2023
| Update: Corrected the affected upper fileset levels for AIX to show
| that AIX 7.1 TL5 SP11 and 7.3 TL0 SP03 are affected.
| Corrected the affected upper fileset levels for VIOS to show that
| VIOS 3.1.2.50 and 3.1.3.30 are affected.
| Added iFixes for AIX 7.1 TL5 SP11 and 7.3 TL0 SP03.
| Added iFixes for VIOS 3.1.2.50 and 3.1.3.30.
| Updated: Wed May 17 11:19:24 CDT 2023
| Update: Corrected the affected fileset levels for AIX 7.2 TL5 and removed
| bos.net.tcp.bind 7.2.5.200.
===============================================================================
*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
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
75.3%