CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
UPDATED: (Additional iFixes are now available for AIX 7.2 TL5 SP5, 7.3 TL0 SP2, 7.3 TL0 SP3, 7.3 TL1 SP1, and VIOS 3.1.3.21, 3.1.3.30, and 3.1.4.10. Both the original and new iFixes address the kernel security vulnerabilities mentioned in the bulletin, but the new iFixes also address the previously released HIPER bulletin: https://www.ibm.com/support/pages/node/6857545) Vulnerabilities in the AIX kernel and kernel extensions could allow a non-privileged local user to cause a denial of service (CVE-2023-45175, CVE-2023-45173, CVE-2023-45169, CVE-2023-45171).
CVEID:CVE-2023-45175
**DESCRIPTION:**IBM AIX could allow a non-privileged local user to exploit a vulnerability in the TCP/IP kernel extension to cause a denial of service.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/267973 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID:CVE-2023-45173
**DESCRIPTION:**IBM AIX could allow a non-privileged local user to exploit a vulnerability in the NFS kernel extension to cause a denial of service.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/267971 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID:CVE-2023-45169
**DESCRIPTION:**IBM AIX could allow a non-privileged local user to exploit a vulnerability in the pmsvcs kernel extension to cause a denial of service.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/267967 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID:CVE-2023-45171
**DESCRIPTION:**IBM AIX could allow a non-privileged local user to exploit a vulnerability in the kernel to cause a denial of service.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/267969 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Product(s) | Version(s) |
---|---|
AIX | 7.2 |
AIX | 7.3 |
VIOS | 3.1 |
The vulnerabilities in the following filesets are being addressed:
Fileset | Lower Level | Upper Level |
---|---|---|
bos.mp64 | 7.2.5.0 | 7.2.5.7 |
bos.net.nfs.client | 7.2.5.0 | 7.2.5.4 |
bos.pmapi.pmsvcs | 7.2.5.0 | 7.2.5.4 |
bos.mp64 | 7.2.5.100 | 7.2.5.107 |
bos.net.nfs.client | 7.2.5.100 | 7.2.5.102 |
bos.pmapi.pmsvcs | 7.2.5.100 | 7.2.5.102 |
bos.mp64 | 7.2.5.200 | 7.2.5.203 |
bos.net.nfs.client | 7.2.5.200 | 7.2.5.201 |
bos.pmapi.pmsvcs | 7.2.5.200 | 7.2.5.201 |
bos.mp64 | 7.3.0.0 | 7.3.0.5 |
bos.net.nfs.client | 7.3.0.0 | 7.3.0.3 |
bos.pmapi.pmsvcs | 7.3.0.0 | 7.3.0.3 |
bos.mp64 | 7.3.1.0 | 7.3.1.3 |
bos.net.nfs.client | 7.3.1.0 | 7.3.1.1 |
bos.pmapi.pmsvcs | 7.3.1.0 | 7.3.1.1 |
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.mp64
A. APARS
IBM has assigned the following APARs to this problem:
For kernel:
AIX Level | APAR | SP |
---|---|---|
7.2.5 | IJ48608 | SP07 |
7.3.0 | IJ48735 | N/A |
7.3.1 | IJ48618 | SP03 |
VIOS Level | APAR | FP |
---|---|---|
3.1.3 | IJ49202 | N/A |
3.1.4 | IJ48608 | 3.1.4.30 |
For NFS kernel extension:
AIX Level | APAR | SP |
---|---|---|
7.2.5 | IJ48671 | SP07 |
7.3.0 | IJ48741 | N/A |
7.3.1 | IJ48725 | SP03 |
VIOS Level | APAR | FP |
---|---|---|
3.1.3 | IJ49533 | N/A |
3.1.4 | IJ48671 | 3.1.4.30 |
For pmsvcs kernel extension:
AIX Level | APAR | SP |
---|---|---|
7.2.5 | IJ48663 | SP07 |
7.3.0 | IJ48737 | N/A |
7.3.1 | IJ48724 | SP03 |
VIOS Level | APAR | FP |
---|---|---|
3.1.3 | IJ49534 | N/A |
3.1.4 | IJ48663 | 3.1.4.30 |
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.
An LPAR system reboot is required to complete the iFix installation, or Live Update may be used on AIX 7.2 and 7.3 to avoid a reboot.
The AIX and VIOS fixes can be downloaded via https from:
<https://aix.software.ibm.com/aix/efixes/security/kernel_fix6.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.
For kernel:
AIX Level | Interim Fix |
---|---|
7.2.5.5 | IJ48608m5a.231219.epkg.Z |
7.2.5.5 (with HIPER) | IJ48608m5b.240109.epkg.Z |
7.2.5.6 | IJ48608s6a.230926.epkg.Z |
7.3.0.2 | IJ48735m2a.231219.epkg.Z |
7.3.0.2 (with HIPER) | IJ48735m2b.240109.epkg.Z |
7.3.0.3 | IJ48735m3a.231219.epkg.Z |
7.3.0.3 (with HIPER) | IJ48735m3b.240109.epkg.Z |
7.3.0.4 | IJ48735s4a.230926.epkg.Z |
7.3.1.1 | IJ48618m1a.231219.epkg.Z |
7.3.1.1 (with HIPER) | IJ48618m1b.240109.epkg.Z |
7.3.1.2 | IJ48618m2a.231213.epkg.Z |
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.
Additional iFixes are now available for AIX 7.2 TL5 SP5, 7.3 TL0 SP2, 7.3 TL0 SP3, and 7.3 TL1 SP1. Both the original and new iFixes address the kernel security vulnerabilities mentioned in the bulletin, but the new iFixes also address the previously released HIPER bulletin:
<https://www.ibm.com/support/pages/node/6857545>
Please reference the Affected Products and Version section above for help with checking installed fileset levels.
VIOS Level | Interim Fix |
---|---|
3.1.3.21 | IJ49202m2a.231219.epkg.Z |
3.1.3.21 (with HIPER) | IJ49202m2b.240109.epkg.Z |
3.1.3.30 | IJ49202m3a.231219.epkg.Z |
3.1.3.30 (with HIPER) | IJ49202m3b.240109.epkg.Z |
3.1.3.40 | IJ49202s4a.231120.epkg.Z |
3.1.4.10 | IJ48608m5a.231219.epkg.Z |
3.1.4.10 | IJ48608m5b.240109.epkg.Z |
3.1.4.21 | IJ48608s6a.230926.epkg.Z |
Additional iFixes are now available for VIOS 3.1.3.21, 3.1.3.30, and 3.1.4.10. Both the original and new iFixes address the kernel security vulnerabilities mentioned in the bulletin, but the new iFixes also address the previously released HIPER bulletin:
<https://www.ibm.com/support/pages/node/6857545>
For NFS kernel extension:
AIX Level | Interim Fix |
---|---|
7.2.5.5 | IJ48671s6a.230927.epkg.Z |
7.2.5.6 | IJ48671s6a.230927.epkg.Z |
7.3.0.2 | IJ48741m2a.231219.epkg.Z |
7.3.0.3 | IJ48741s4a.230927.epkg.Z |
7.3.0.4 | IJ48741s4a.230927.epkg.Z |
7.3.1.1 | IJ48725s1a.230927.epkg.Z |
7.3.1.2 | IJ48725s2a.230927.epkg.Z |
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.
Please reference the Affected Products and Version section above for help with checking installed fileset levels.
VIOS Level | Interim Fix |
---|---|
3.1.3.21 | IJ49533m4a.231219.epkg.Z |
3.1.3.30 | IJ49533s4a.231219.epkg.Z |
3.1.3.40 | IJ49533s4a.231219.epkg.Z |
3.1.4.10 | IJ48671s6a.230927.epkg.Z |
3.1.4.21 | IJ48671s6a.230927.epkg.Z |
For pmsvcs kernel extension:
AIX Level | Interim Fix |
---|---|
7.2.5.5 | IJ48663s5a.230926.epkg.Z |
7.2.5.6 | IJ48663s6a.230926.epkg.Z |
7.3.0.2 | IJ48737s3a.230926.epkg.Z |
7.3.0.3 | IJ48737s3a.230926.epkg.Z |
7.3.0.4 | IJ48737s4a.230926.epkg.Z |
7.3.1.1 | IJ48724s1a.230926.epkg.Z |
7.3.1.2 | IJ48724s2a.230926.epkg.Z |
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.
Please reference the Affected Products and Version section above for help with checking installed fileset levels.
VIOS Level | Interim Fix |
---|---|
3.1.3.21 | IJ49534s3a.231213.epkg.Z |
3.1.3.30 | IJ49534s3a.231213.epkg.Z |
3.1.3.40 | IJ49534s4a.231213.epkg.Z |
3.1.4.10 | IJ48663s5a.230926.epkg.Z |
3.1.4.21 | IJ48663s6a.230926.epkg.Z |
The fixes are cumulative and address previously issued AIX/VIOS kernel security bulletins with respect to SP and TL, which includes:
<https://aix.software.ibm.com/aix/efixes/security/kernel_advisory5.asc>
<https://www.ibm.com/support/pages/node/6847947>
To extract the fixes from the tar file:
tar xvf kernel_fix6.tar
cd kernel_fix6
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 |
---|---|
14a2616e3ee20b13704f7b6244f21a65a97cb7c22a478de8a37c49e0a726f3c1 | IJ48608m5a.231219.epkg.Z |
504bfc2d18d39a34ddfd2bf95066c655cab1760cc69ae8d27fe199018410d0b6 | IJ48608s6a.230926.epkg.Z |
5325363a718af21758d3db4f9e004aab9cb7db59ba1fae726fda8be079a6ef1d | IJ48618m2a.231213.epkg.Z |
03f36890c2f06b06e7ef3f7736f6d2c67cc3e9847ef170df12275a3ffa02188b | IJ48618m2a.231213.epkg.Z |
e8ef4c651fb5c5ffa3452a9135eff0904579147f39fe44cf488c6806b0069645 | IJ48663s5a.230926.epkg.Z |
0c53da3000a1158e0e36891573c0986a05af7c426b8496dae19929ed3189039a | IJ48663s6a.230926.epkg.Z |
25e99fc40a69b6c94a44642ca7e1e4fa1517f290cd7a2dcb0cb584f8d4efd531 | IJ48671s6a.230927.epkg.Z |
ff4c8e410754616aa60578db18982d12f9775aa7015e80351371e0133d4f4aeb | IJ48724s1a.230926.epkg.Z |
1a8e0bcf106f604ac204ff050ae1933d044ddc48d5995ce2364f43baf8512abb | IJ48724s2a.230926.epkg.Z |
076ad4485ddda4ae60bc56799fd3584ca1b7252e47a7388c0be9d56c9af4de46 | IJ48725s1a.230927.epkg.Z |
2b603d5feace28bd2691bd1025947fa10d35e3518c10372bb930bfebd70d1e42 | IJ48725s2a.230927.epkg.Z |
11b28e5fc179cbee7cb0e21974c6eaef791a07fdda7ae785cb3c5c6d460ace88 | IJ48735m2a.231219.epkg.Z |
85f90a1b1a5b269eb0fb7d45d816ccf1d3e5b39f04e110c0e52febfc13723422 | IJ48735m3a.231219.epkg.Z |
14083e78d269db481cffff4046999533316dd36a21428dfe23786812025eefb2 | IJ48735s4a.230926.epkg.Z |
6833da6ce8cd21e3bb2d914808ee1fa9b5c7469e52eca0e4fe969947caf50d09 | IJ48737s3a.230926.epkg.Z |
e5b7cd0ad9ae96b8602b346c0199e5cca6ebd615d6a5612c59c013528c8226c1 | IJ48737s4a.230926.epkg.Z |
3e88d8817eb9b2f6ea65f6a13042084bf2dcc3a24244e224cc556945ff3829d4 | IJ48741m2a.231219.epkg.Z |
4d77c6f5b0d7750cb9e975687f543f546ab0f254fa348762a0dc8e7f201d1d7d | IJ48741s4a.230927.epkg.Z |
8027088069553ae29915bb2538d11a0801852593a45f406efd78af8d9b50b67c | IJ49202m2a.231219.epkg.Z |
11ffb27f618daeefa56479deeb18bf288e9891939c9c3adb71b02395fbf14779 | IJ49202m3a.231219.epkg.Z |
20744ab276c2a697f626c2e3fae22277788c4484afc363558afcf59fbed118d6 | IJ49202s4a.231120.epkg.Z |
1af23035e03a182e6d5fc7ce8954beb68bffca8f38bd5bd7605eb9fb418d0eda | IJ49533m4a.231219.epkg.Z |
f678a37fc3b4dfbb2065e6f56899f1d557f1ab89e26c00aaa13077bfb08e694d | IJ49533s4a.231219.epkg.Z |
05d659a6dfcefbb229c0b4e66ed3a5059a5af16798a693428c1d3fef22bd9e5c | IJ49534s3a.231213.epkg.Z |
83ba604135873bdbe4da6f4b920412d5ad7085880aa88bc91ffdbae266d49b56 | IJ49534s4a.231213.epkg.Z |
84b15a61968e044f945d958d5b305fc20f73668a2961387d24f935bfd7132284 | IJ48608m5b.240109.epkg.Z |
71e5fd327d1517c966294ff0e2b322c1fb3aa4438830604641ddd80f1211bcff | IJ48618m1b.240109.epkg.Z |
0857cbef40761609ff33a317c7c57973c8fab055a1eecab21f442b593f96d4e0 | IJ48735m2b.240109.epkg.Z |
cd338323e6a33dc4eede3c64ddef25fe398c9390101a1d7bbd499d5a9b5ca10c | IJ48735m3b.240109.epkg.Z |
d7032908befad9f9e94cc975989c5f68fb343ee23c43c1483114c63194663827 | IJ49202m2b.240109.epkg.Z |
5c76faab2340058ae3d4a9ec8db5e89cb3582fe6c431949b8cc3b8b7cb9f5981 | IJ49202m3b.240109.epkg.Z |
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/kernel_advisory6.asc.sig>
C. FIX AND INTERIM FIX INSTALLATION
An LPAR system reboot is required to complete the iFix installation, or Live Update may be used on AIX 7.2 and 7.3 to avoid a reboot.
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
To install a fix package:
installp -a -d fix_name -X all # where fix_name is the name of the
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
To install an interim fix package:
emgr -e ipkg_name -X # where ipkg_name is the name of the
None
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%