-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
Vulnerability in OpenSSL affects AIX (CVE-2018-0737)
4 July 2018
AusCERT Security Bulletin Summary
Operating System: AIX
Impact/Access: Access Privileged Data -- Existing Account
CVE Names: CVE-2018-0737
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletin: Vulnerability in OpenSSL affects AIX (CVE-2018-0737)
Software version: 5.3, 6.1, 7.1, 7.2
Operating system(s): AIX
Reference #: 0713441
Modified date: 02 July 2018
There is a vulnerability in OpenSSL used by AIX.
DESCRIPTION: The OpenSSL RSA Key generation algorithm has been shown to be
vulnerable to a cache timing side channel attack. An attacker with sufficient
access to mount cache timing attacks during the RSA key generation process
could recover the private key.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
141679 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
AIX 5.3, 6.1, 7.1, 7.2
The following fileset levels are vulnerable:
key_fileset = osrcaix
Fileset Lower Level Upper Level KEY
openssl.base 184.108.40.2060 220.127.116.110 key_w_fs
openssl.base 18.104.22.1680 22.214.171.1240 key_w_fs
A. 0.9.8, 1.0.1 OpenSSL versions are out-of-support. Customers are advised to
upgrade to currently supported OpenSSL 1.0.2 version.
B. Latest level of OpenSSL fileset is available from the web download site:
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 openssl.base
A fix is available, and it can be downloaded from:
To extract the fixes from the tar file:
For Openssl 1.0.2 version -
zcat openssl-126.96.36.1990.tar.Z | tar xvf -
For 1.0.2 FIPS capable openssl version -
zcat openssl-188.8.131.520.tar.Z | tar xvf -
IMPORTANT: If possible, it is recommended that a mksysb backup of the system be
created. Verify it is both bootable and readable before proceeding.
Note that all the previously reported security vulnerability fixes are also
included in above mentioned fileset level. Please refer to the readme file
(provided along with the fileset) for the complete list of vulnerabilities
To preview the fix installation:
installp -apYd . openssl
To install the fix package:
installp -aXYd . openssl
openssl dgst -sha1 -verify [pubkey_file] -signature [advisory_file].sig
openssl dgst -sha1 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file]
Published advisory OpenSSL signature file location:
Workarounds and Mitigations
*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.
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 email@example.com
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
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-----
-----END PGP SIGNATURE-----