Security Bulletin
Summary
A vulnerability in IBM PowerVM VIOS could allow a remote attacker to tamper with system configuration or cause a denial of service (CVE-2022-35643).
Vulnerability Details
CVEID: CVE-2022-35643
DESCRIPTION: IBM PowerVM VIOS could allow a remote attacker to tamper with system configuration or cause a denial of service.
CVSS Base score: 9.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/230956 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)
DESCRIPTION: IBM PowerVM VIOS could allow a remote attacker to tamper with system configuration or cause a denial of service.
CVSS Base score: 9.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/230956 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| PowerVM VIOS | 3.1 |
The following fileset levels are vulnerable:
| Fileset | Lower Level | Upper Level |
| devices.vtdev.scsi.rte | 7.2.4.0 | 7.2.4.4 |
| devices.vtdev.scsi.rte | 7.2.5.0 | 7.2.5.3 |
| devices.vtdev.scsi.rte | 7.2.5.100 | 7.2.5.102 |
To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in the VIOS user's guide.
Example: lslpp -L | grep -i devices.vtdev.scsi.rte
Remediation/Fixes
A. APARS
IBM has assigned the following APARs to this problem:
| VIOS Level | APAR | SP |
| 3.1.1 | IJ40954 | N/A |
| 3.1.2 | IJ40951 | 3.1.2.50 |
| 3.1.3 | IJ40952 | 3.1.3.30 |
Subscribe to the APARs here:
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:
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 VIOS level.
| VIOS Level | Interim Fix |
| 3.1.1.30 | IJ40954s3a.220711.epkg.Z |
| 3.1.1.40 | IJ40954s4a.220711.epkg.Z |
| 3.1.1.50 | IJ40954s5a.220711.epkg.Z |
| 3.1.2.10 | IJ40951s1a.220711.epkg.Z |
| 3.1.2.21 | IJ40951s2a.220711.epkg.Z |
| 3.1.2.30 | IJ40951s3a.220711.epkg.Z |
| 3.1.3.10 | IJ40952s3b.220712.epkg.Z |
| 3.1.3.14 | IJ40952s3a.220712.epkg.Z |
| 3.1.3.21 | IJ40952s4a.220712.epkg.Z |
To extract the fixes from the tar file:
tar xvf vios_fix.tar
cd vios_fix
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 |
| f0745566389979df0a42bf1ba2ac477aed772e34c411a24c6b1adb328bc3b774 | IJ40951s1a.220711.epkg.Z |
| abb309f88ed635aeada75b85931ffd5634e338cbd272db91018e21e3cbd37224 | IJ40951s2a.220711.epkg.Z |
| 6405a177fa465e4eba4c92e44de7c4f37a9a7c95a3925baa567ea4b1f7f4f994 | IJ40951s3a.220711.epkg.Z |
| 57d2dea8596bff2b0987962f0049e604a4cd2893de7f81c990738fb044750aa2 | IJ40952s3a.220712.epkg.Z |
| 844e03208b787d38f8e650d03cf3ebccaa5b31a6cfc54a06bc3673912bb1581d | IJ40952s3b.220712.epkg.Z |
| 8e6570e0133208b232610c536fc9af00ed32630a8f62997fb402f6e383f10a3a | IJ40952s4a.220712.epkg.Z |
| e31f8e74ea9bf16aa613baa21f9a11bd95f7780cc5971c1db36b84e3248326e2 | IJ40954s3a.220711.epkg.Z |
| c953530436cd7847632c89490fd34cb03437671be9923e62cba16b426e8a2f87 | IJ40954s4a.220711.epkg.Z |
| 115086d423a282a128098f12a6f34b7e4284249c148ca329d246385b47ddff8f | IJ40954s5a.220711.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 VIOS 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:
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:
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
Get Notified about Future Security Bulletins
References
Off
Change History
28 Jul 2022: Initial Publication
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
[{"Type":"MASTER","Line of Business":{"code":"LOB57","label":"Power"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSPHKW","label":"PowerVM Virtual I\/O Server"},"ARM Category":[],"Platform":[{"code":"PF002","label":"AIX"}],"Version":"All Versions"}]
Was this topic helpful?
Document Information
Modified date:
29 July 2022
UID
ibm16607886