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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.
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 126.96.36.1990 | VIOS 2.X: all versions equal to 188.8.131.520
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 184.108.40.2061 OpenSSH 220.127.116.1103 (Available) VIOS OpenSSL OpenSSH ------------------------------------------------------------------ 2.X OpenSSL 18.104.22.1681 OpenSSH 22.214.171.12403 (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 126.96.36.19903 https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp
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-188.8.131.521.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
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: firstname.lastname@example.org 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@example.com B. Download the key from our web page:
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.
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: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4353 CVE-2013-6450: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6450 CVE-2013-6449: http://cve.mitre.org/cgi-bin/cvename.cgi?name=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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