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IBM SECURITY ADVISORY

First Issued: Tues Feb 25 14:07:48 CDT 2014
| Updated: Mon Mar 3 11:46:39 CDT 2014
| Update: Clarified vulnerable filesets

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory6.asc
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory6.asc
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory6.asc

                       VULNERABILITY SUMMARY

VULNERABILITY: Multiple OpenSSL vulnerabilities

PLATFORMS: AIX 5.3, 6.1 and 7.1
VIOS 2.X

SOLUTION: Apply the fix as described below.

THREAT: See below

CVE Numbers: CVE-2013-4353
CVE-2013-6450
CVE-2013-6449

Reboot required? NO
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO

                       DETAILED INFORMATION

I. DESCRIPTION (From cve.mitre.org)

CVE-2013-4353
A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL 
pointer exception. A malicious server could use this flaw to crash a
connecting client. This issue only affected OpenSSL 1.0.1 versions. 

CVE-2013-6450
A flaw in DTLS handling can cause an application using OpenSSL and DTLS to
crash. This is not a vulnerability for OpenSSL prior to 1.0.0. OpenSSL is 
vulnerable to a denial of service, caused by the failure to properly 
maintain data structures for digest and encryption contexts by the DTLS    
retransmission implementation. A remote attacker could exploit this i
vulnerability to cause the daemon to crash.

CVE-2013-6449
A flaw in OpenSSL can cause an application using OpenSSL to crash when 
using TLS version 1.2. This issue only affected OpenSSL 1.0.1 versions. 
OpenSSL is vulnerable to a denial of service, caused by an error in the 
ssl_get_algorithm2 function. A remote attacker could exploit this 
vulnerability using specially-crafted traffic from a TLS 1.2 client to 
cause the daemon to crash.

II. CVSS

CVE-2013-4353
CVSS Base Score: 5
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/90201 for the 
current score 
CVSS Environmental Score*: Undefined 
CVSS Vector:  (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVE-2013-6450
CVSS Base Score: 4.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/90069 for the 
current score 
CVSS Environmental Score*: Undefined 
CVSS Vector:  (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVE-2013-6449
CVSS Base Score: 4.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/90068 for thei
current score 
CVSS Environmental Score*: Undefined 
CVSS Vector:  (AV:N/AC:M/Au:N/C:N/I:N/A:P)

III. PLATFORM VULNERABILITY ASSESSMENT

The following fileset levels are vulnerable:

| AIX 7.1, 6.1, 5.3: all versions equal to 1.0.1.500
| VIOS 2.X: all versions equal to 1.0.1.500

IMPORTANT: If AIX OpenSSH is in use, it must be updated to version
OpenSSH 6.0 or later, depending on the OpenSSL version according to
following compatibility matrix:

AIX              OpenSSL                    OpenSSH
------------------------------------------------------------------
5.3,6.1,7.1      OpenSSL 1.0.1.501          OpenSSH 6.0.0.6103
                 (Available)

VIOS             OpenSSL                    OpenSSH
------------------------------------------------------------------
2.X              OpenSSL 1.0.1.501          OpenSSH 6.0.0.6103
                 (Available)

Note: To find out whether the affected filesets are installed on your
systems, refer to the lslpp command found in AIX user's guide.

AIX OpenSSH can be downloaded from:

OpenSSH 6.0:
http://sourceforge.net/projects/openssh-aix
OpenSSH 6.0.0.6103
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp

IV. FIXES

A fix is available, and it can be downloaded from:

https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp

To extract the fixes from the tar file:

zcat openssl-1.0.1.501.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.

To preview the fix installation:

installp -apYd . openssl

To install the fix package:

installp -aXYd . openssl

V. WORKAROUNDS

There are no workarounds.

VI. CONTACT INFORMATION

If you would like to receive AIX Security Advisories via email,
please visit:

    http://www.ibm.com/systems/support

and click on the "My notifications" link.

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:

    [email protected]

To obtain the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:

    A. Send an email with "get key" in the subject line to:

        [email protected]

    B. Download the key from our web page:

http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt

    C. 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.

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.

VII. REFERENCES:

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/90201
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/90069
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/90068
CVE-2013-4353: https://vulners.com/cve/CVE-2013-4353
CVE-2013-6450: https://vulners.com/cve/CVE-2013-6450
CVE-2013-6449: https://vulners.com/cve/CVE-2013-6449

*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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