5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.003 Low
EPSS
Percentile
68.9%
IBM SECURITY ADVISORY
First Issued: Tue Dec 11 09:37:36 CST 2018
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc
Security Bulletin: Vulnerabilities in OpenSSL affect AIX (CVE-2018-0734,
CVE-2018-5407)
===============================================================================
SUMMARY:
There are vulnerabilities in OpenSSL used by AIX.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2018-0734
https://vulners.com/cve/CVE-2018-0734
https://vulners.com/cve/CVE-2018-0734
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by a timing side channel attack in the DSA
signature algorithm. An attacker could exploit this vulnerability
using variations in the signing algorithm to recover the private key.
CVSS Base Score: 3.7
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/152085
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector:(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2018-5407
https://vulners.com/cve/CVE-2018-5407
https://vulners.com/cve/CVE-2018-5407
DESCRIPTION: Multiple SMT/Hyper-Threading architectures and
processors could allow a local attacker to obtain sensitive
information, caused by execution engine sharing on Simultaneous
Multithreading (SMT) architecture. By using the PortSmash new
side-channel attack, an attacker could run a malicious process next
to legitimate processes using the architectures parallel thread
running capabilities to leak encrypted data from the CPU's internal
processes. Note: This vulnerability is known as PortSmash.
CVSS Base Score: 5.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/152484
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector:(CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
AFFECTED PRODUCTS AND VERSIONS:
AIX 5.3, 6.1, 7.1, 7.2
VIOS 2.2.x
The following fileset levels are vulnerable:
key_fileset = osrcaix
Fileset Lower Level Upper Level KEY
------------------------------------------------------
openssl.base 1.0.2.500 1.0.2.1600 key_w_fs
openssl.base 20.13.102.1000 20.16.102.1600 key_w_fs
Note:
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:
https://www-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?source=aixbp&S_PKG=openssl
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
REMEDIATION:
A. FIXES
The fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/security/openssl_fix29.tar
http://aix.software.ibm.com/aix/efixes/security/openssl_fix29.tar
https://aix.software.ibm.com/aix/efixes/security/openssl_fix29.tar
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 AIX
Technology Levels.
Note that the tar file contains Interim fixes that are based on
OpenSSL version, and AIX OpenSSL fixes are cumulative.
You must be on the 'prereq for installation' level before
applying the interim fix. This may require installing a new
level(prereq version) first.
AIX Level Interim Fix (*.Z) Fileset Name(prereq for installation) KEY
--------------------------------------------------------------------------------------------
5.3, 6.1, 7.1, 7.2 102p_fix.181127.epkg.Z openssl.base(1.0.2.1600) key_w_fix
5.3, 6.1, 7.1, 7.2 fips_102p.181127.epkg.Z openssl.base(20.16.102.1600) key_w_fix
VIOS Level Interim Fix (*.Z) Fileset Name(prereq for installation) KEY
--------------------------------------------------------------------------------------------
2.2.x 102p_fix.181127.epkg.Z openssl.base(1.0.2.1600) key_w_fix
2.2.x fips_102p.181127.epkg.Z openssl.base(20.16.102.1600) key_w_fix
To extract the fixes from the tar file:
tar xvf openssl_fix29.tar
cd openssl_fix29
Verify you have retrieved the fixes intact:
The checksums below were generated using the
"openssl dgst -sha256 file" command as the followng:
openssl dgst -sha256 filename KEY
-----------------------------------------------------------------------------------------------------
4f68017e5ff53cb74e0f6e30fc0410193dd1641e7997a5a9e4bc630d47666eaf 102p_fix.181127.epkg.Z key_w_csum
42714d3f644d4b3250314721ae2e32f0680fea264f9b358a50f7fe9c07713b38 fips_102p.181127.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 AIX Support at
https://ibm.com/support/ and describe the discrepancy.
openssl dgst -sha1 -verify <pubkey_file> -signature <advisory_file>.sig <advisory_file>
openssl dgst -sha1 -verify <pubkey_file> -signature <ifix_file>.sig <ifix_file>
Published advisory OpenSSL signature file location:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc.sig
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory29.asc.sig
B. 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:
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":
http://www.ibm.com/support/mynotifications
https://www.ibm.com/support/mynotifications
To view previously issued advisories, please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
https://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
Contact IBM Support for questions related to this announcement:
http://ibm.com/support/
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
https://www.first.org/cvss/user-guide
On-line Calculator v3:
http://www.first.org/cvss/calculator/3.0
https://www.first.org/cvss/calculator/3.0
RELATED INFORMATION:
Security Bulletin: Vulnerabilities in OpenSSL affect AIX (CVE-2018-0734,
CVE-2018-5407)
https://www-01.ibm.com/support/docview.wss?uid=ibm10742759
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Tue Dec 11 09:37:36 CST 2018
===============================================================================
*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.
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.003 Low
EPSS
Percentile
68.9%