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AUSCERT External Security Bulletin Redistribution
ESB-2015.0291
AIX OpenSSL does not properly calculate the square of a BIGNUM value which
makes it easier for attacker to defeat cryptographic protection mechanisms
6 February 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: OpenSSL
Publisher: IBM
Operating System: AIX
Impact/Access: Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0206 CVE-2015-0205 CVE-2015-0204
CVE-2014-8275 CVE-2014-3572 CVE-2014-3571
CVE-2014-3570
Reference: ASB-2015.0015
ESB-2015.0149
ESB-2015.0101
ESB-2015.0056
ESB-2015.0048.2
Original Bulletin:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc
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IBM SECURITY ADVISORY
First Issued: Wed Feb 4 06:24:41 CST 2015
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc
===============================================================================
VULNERABILITY SUMMARY
1. VULNERABILITY: AIX OpenSSL does not properly calculate the square of a BIGNUM
value which makes it easier for attacker to defeat cryptographic
protection mechanisms
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2014-3570
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
2.VULNERABILITY: AIX OpenSSL Denial of Service due to NULL pointer dereference
while processing a DTLS message
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2014-3571
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
3. VULNERABILITY: AIX OpenSSL allows remote SSL servers to conduct ECDHE-to-ECDH
downgrade attacks and thereby causing loss of forward secrecy
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2014-3572
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
4. VULNERABILITY: AIX OpenSSL allows remote attackers to defeat the fingerprint-based
certificate blacklist protection mechanism
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2014-8275
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
5. VULNERABILITY: AIX OpenSSL allows remote SSL servers to conduct RSA-to-EXPORT_RSA
downgrade attacks and thereby offering a weak ephemeral RSA key in
a noncompliant role
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2015-0204
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
6. VULNERABILITY: AIX OpenSSL allows remote attackers to obtain access without
knowledge of a private key on a server that recognizes a
Certification Authority with DH support
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2015-0205
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
7. VULNERABILITY: AIX OpenSSL allows remote attackers to cause Denial of Service
by sending many duplicate records for the next epoch, leading
to failure of replay detection
PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2015-0206
Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
===============================================================================
DETAILED INFORMATION
I. DESCRIPTION
1. CVE-2014-3570
OpenSSL does not properly calculate the square of a BIGNUM value, which might
make it easier for remote attackers to defeat cryptographic protection mechanisms
via unspecified vectors
2. CVE-2014-3571
OpenSSL allows remote attackers to cause a denial of service via a crafted DTLS
message that is processed with a different read operation for the handshake
header than for the handshake body
3. CVE-2014-3572
OpenSSL allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks
and trigger loss of forward secrecy by omitting the ServerKeyExchange message.
4. CVE-2014-8275
OpenSSL does not enforce certain constraints on certificate data, which allows
remote attackers to defeat a fingerprint-based certificate-blacklist protection
mechanism by including crafted data within a certificate's unsigned portion
5. CVE-2015-0204
OpenSSL allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks
and facilitate brute-force decryption by offering a weak ephemeral RSA key
in a noncompliant role.
6. CVE-2015-0205
OpenSSL accepts client authentication with a Diffie-Hellman (DH) certificate
without requiring a CertificateVerify message, which allows remote attackers
to obtain access without knowledge of a private key via crafted TLS Handshake
Protocol traffic to a server that recognizes a Certification Authority
with DH support.
7. CVE-2015-0206
OpenSSL could allow remote attackers to cause a denial of service (memory
consumption) by sending many duplicate records for the next epoch, leading
to failure of replay detection.
II. CVSS
1. CVE-2014-3570
CVSS Base Score: 2.6
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99710
CVSS Environmental Score*: Undefined
CVSS Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N
2. CVE-2014-3571
CVSS Base Score: 5
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99703
CVSS Environmental Score*: Undefined
CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
3. CVE-2014-3572
CVSS Base Score: 1.2
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99705
CVSS Environmental Score*: Undefined
CVSS Vector: AV:L/AC:H/Au:N/C:N/I:P/A:N
4. CVE-2014-8275
CVSS Base Score: 1.2
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99709
CVSS Environmental Score*: Undefined
CVSS Vector: AV:L/AC:H/Au:N/C:N/I:P/A:N
5. CVE-2015-0204
CVSS Base Score: 1.2
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99707
CVSS Environmental Score*: Undefined
CVSS Vector: AV:L/AC:H/Au:N/C:N/I:P/A:N
6. CVE-2015-0205
CVSS Base Score: 2.1
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99708
CVSS Environmental Score*: Undefined
CVSS Vector: AV:N/AC:H/Au:S/C:N/I:P/A:N
7. CVE-2015-0206
CVSS Base Score: 5
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/99704
CVSS Environmental Score*: Undefined
CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
III. PLATFORM VULNERABILITY ASSESSMENT
To determine if your system is vulnerable, execute the following
command:
lslpp -L openssl.base
The following fileset levels are vulnerable:
A. CVE-2014-3572, CVE-2015-0205, CVE-2015-0206
AIX Fileset Lower Level Upper Level
------------------------------------------
openssl.base 1.0.1.500 1.0.1.513
B. CVE-2014-3570, CVE-2014-3571, CVE-2014-8275, CVE-2015-0204
AIX Fileset Lower Level Upper Level
------------------------------------------
openssl.base 1.0.1.500 1.0.1.513
openssl.base 0.9.8.401 0.9.8.2504
openssl.base 12.9.8.1100 12.9.8.2504
Note, 0.9.8.401 and 12.9.8.1100 are the Lowest OpenSSL version
available in aix web download site. Even OpenSSL versions below
this are impacted
IV. SOLUTIONS
A. FIXES
Fix is available. The fix can be downloaded via ftp
from:
ftp://aix.software.ibm.com/aix/efixes/security/openssl_fix12.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
releases.
Note that the tar file contains Interim fixes that are based on OpenSSL version.
AIX Level Interim Fix (*.Z) Fileset Name(prereq for installation)
---------------------------------------------------------------------------------
5.3, 6.1, 7.1 IV69033s9a.150129.epkg.Z openssl.base(1.0.1.513 version)
5.3, 6.1, 7.1 IV69033s9b.150129.epkg.Z openssl.base(0.9.8.2504 version)
5.3, 6.1, 7.1 IV69033s9c.150129.epkg.Z openssl.base(12.9.8.2504 version)
VIOS Level Interim Fix (*.Z) Fileset Name(prereq for installation)
-------------------------------------------------------------------------------------
2.2.* IV69033s9a.150129.epkg.Z openssl.base(1.0.1.513 version)
2.2.* IV69033s9b.150129.epkg.Z openssl.base(0.9.8.2504 version)
2.2.* IV69033s9c.150129.epkg.Z openssl.base(12.9.8.2504 version)
To extract the fix from the tar file:
tar xvf openssl_fix12.tar
cd openssl_fix12
Verify you have retrieved the fix intact:
The checksums below were generated using the
"openssl dgst -sha256 file" command is the followng:
openssl dgst -sha256 filename
----------------------------------------------------------------------------------------------
ba67b128e22ca028756100a473137b64cd8758c8182e4cda8bc3293b69cb53ba IV69033s9a.150129.epkg.Z
1c244927ae807d9c55dee91366ac88488a1312103a19f3017758989f91759f48 IV69033s9b.150129.epkg.Z
361e751b0ce323b57b8865fca66e90f0dc541857a04b4c67f55874b01e98fffb IV69033s9c.150129.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 AIX Security at
security-alert@austin.ibm.com and describe the discrepancy.
Published advisory OpenSSL signature file location:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc.sig
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc.sig
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc.sig
openssl dgst -sha1 -verify <pubkey_file> -signature <advisory_file>.sig <advisory_file>
openssl dgst -sha1 -verify <pubkey_file> -signature <ifix_file>.sig <ifix_file>
B. FIX AND INTERIM FIX INSTALLATION
IMPORTANT: 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
# fix package being previewed.
To install a fix package:
installp -a -d fix_name -X all # where fix_name is the name of the
# fix package being installed.
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.
V. WORKAROUNDS
No workarounds.
VI. CONTACT US:
If you would like to receive AIX Security Advisories via email,
please visit "My Notifications":
http://www.ibm.com/support/mynotifications
To view previously issued advisories, please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
Comments regarding the content of this announcement can be
directed to:
security-alert@austin.ibm.com
To obtain the OpenSSL public key that can be used to verify the
signed advisories and ifixes:
Download the key from our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt
To obtain the PGP public key that can be used to communicate
securely with the AIX Security Team via security-alert@austin.ibm.com you
can either:
A. Download the key from our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgppubkey.txt
B. Download the key from a PGP Public Key Server. The key ID is:
0x28BFAA12
Please contact your local IBM AIX support center for any
assistance.
VII. REFERENCES:
Note: Keywords labeled as KEY in this document are used for parsing purposes.
eServer is a trademark of International Business Machines
Corporation. IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation. All other trademarks
are property of their respective holders.
Complete CVSS Guide: http://www.first.org/cvss/cvss-guide.html
On-line Calculator V2: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99710
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99703
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99705
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99709
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99707
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99708
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/99704
CVE-2014-3570 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3570
CVE-2014-3571 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3571
CVE-2014-3572 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3572
CVE-2014-8275 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8275
CVE-2015-0204 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0204
CVE-2015-0205 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0205
CVE-2015-0206 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0206
*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 Flash.
Note: 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.
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