Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.0939
IBM Security Bulletin: This Power System update is being
released to address CVE 2018-1992
22 March 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Power 9 Systems
Publisher: IBM
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-1992
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10868992
- --------------------------BEGIN INCLUDED TEXT--------------------
This Power System update is being released to address CVE 2018-1992
Product: Power 9 Systems
Software version: OP910, OP920, FW910
Operating system(s): BMC, Firmware
Reference #: 0868992
Security Bulletin
Summary
Power9: In response to a buffer overflow vulnerability on the boot loader, a
new Power System firmware update is being released to address Common
Vulnerabilities and Exposures issue number CVE 2018-1992.
Vulnerability Details
CVEID: CVE-2018-1992
DESCRIPTION: The IBM Power 9 boot firmware's bootloader is responsible for
loading and validating the initial boot firmware image that drives the rest of
the system's hardware initialization. The bootloader firmware contains a buffer
overflow vulnerability such that, if an attacker were able to replace the
initial boot firmware image with a very carefully crafted and sufficiently
large, malicious replacement, it could cause the bootloader, during the load of
that image, to overwrite its own instruction memory and circumvent secure boot
protections, install trojans, etc. The firmware mitigation adds additional
checking of the initial boot firmware image's load size and terminates the boot
if the size is too big.
CVSS Base Score: 6.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
154345
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
The firmware update can be obtained from FixCentral by specifying the Product
and fix level as specified in this Remediation section.
Affected Products and Versions
Firmware release FW910 is affected.
P9 OpenPOWER releases OP910 and OP920 are affected.
Remediation/Fixes
Customers with the products below, install FW910.10 or above.
1) IBM Power System S922 (9009-22A)
2) IBM Power System H922 (9223-22H)
3) IBM Power System S914 (9009-41A)
4) IBM Power System S924 (9009-42A)
5) IBM Power System H924 (9223-42H)
6) IBM Power System L922 (9008-22L)
Customers with the products below running OP910, install the OP910.30
1) IBM Power System AC922 (8335-GTG)
Customers with the products below running OP920, install the OP920.10
1) IBM Power System AC922 (8335-GTH)
2) IBM Power System AC922 (8335-GTX)
3) IBM Power System LC921 (9006-12P)
4) IBM Power System LC922 (9006-22P)
Reference
Complete CVSS v3 Guide
On-line Calculator v3
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
*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.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQIVAwUBXJRLsWaOgq3Tt24GAQjyWRAAsey2UY0JnEHW1rpocylHC2uKfsIlHj/1
U4mx3jG6YIsgmEF5XXIsSrokn95wxOREy7jMwFbU9+E0AkE7htEFDEqmaV0jzGeV
rZdPZiWDlKF4ZoqxDKJdCJJBf1cNSN29jbTOD6eC17APxoVvUgDUPvcympVacuR3
KzCNMGCOeiQ3Eao88MbgSK4tdLFCBP/I69JHNn541qBA1mzAnG+CZ/sMz1OjlQEq
OAYTkpdcFYfe1aflIWHrvTcpS/pVcRgderAF0l2T2Zn6iFZeyO7Y5J2OCv6r8AiI
SBue7gmMirWQbbrFAYMx5mVtrtmxNmu5XkTvIOq5JRnTFEsu84W0U16iQ/NARfmh
vwWXR8qLU8G69nkQJDV4OAazbskxvCwChyUhOLAhoSGxdT81XKO+8MdDH7FvNfev
qdbe7EOTRsjQM5/YAafvEDhM6cbiGVrEEU0l3lBuB2s1ONke2SB6WK6C0g/0+wFz
y5WzBgY21spUTi5OEVK8JCMvJ3Ykx3WuF8yYr1j+cVxfIFRngFGNjK6EJrDnBLog
U7vfx0H4ICG1Dq9md6+DUiBr89XFrTCord7dbl2XuOrlzAkVT3LVgvoiC389lahO
fzBJNxa7N0WkpI75LxWCEV84MTCbRmTnBtXCm3UfW4mz/UtIXkP30qcLBvR4pelG
JGnltbg5Xz8=
=bYUR
-----END PGP SIGNATURE-----