-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Tue Jun 17 04:07:12 CDT 2014 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/openssh_advisory4.asc https://aix.software.ibm.com/aix/efixes/security/openssh_advisory4.asc ftp://aix.software.ibm.com/aix/efixes/security/openssh_advisory4.asc =============================================================================== VULNERABILITY SUMMARY VULNERABILITY: AIX OpenSSH Vulnerability PLATFORMS: AIX 5.3, 6.1 and 7.1 VIOS VIOS 2.2.* SOLUTION: Apply the fix as described below. THREAT: See below CVE Numbers: CVE-2014-2532,CVE-2014-2653 Reboot required? NO Workarounds? NO Protected by FPM? NO Protected by SED? NO =============================================================================== DETAILED INFORMATION I. DESCRIPTION CVE-2014-2532 OpenSSH could allow a remote attacker to bypass security restrictions, caused by the inclusion of wildcard characters in the AcceptEnv lines of the sshd_config configuration file within the sshd program.By using a substring before a wildcard character, an attacker could exploit this vulnerability to bypass intended environment restrictions. CVE-2014-2653 OpenSSH could allow a remote attacker to bypass security restrictions, caused by an error in the SSH client when handling a HostCertificate. By persuading a victim to visit a specially-crafted Web site containing a malicious certificate, an attacker could exploit this vulnerability using a malicious server to disable SSHFP-checking. II. CVSS CVE-2014-2532 CVSS Base Score:5 CVSS Temporal Score:see http://xforce.iss.net/xforce/xfdb/91986 CVSS Environmental Score*:Undefined CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:N/A:N) CVE-2014-2653 CVSS Base Score:4.3 CVSS Temporal Score:see http://xforce.iss.net/xforce/xfdb/92116 CVSS Environmental Score*:Undefined CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:N/A:N) III. PLATFORM VULNERABILITY ASSESSMENT To determine if your system is vulnerable, execute the following command: lslpp -L openssh.base The following fileset levels are vulnerable: AIX Fileset Lower Level Upper Level KEY -------------------------------------------------------- openssh.base 4.0.0.5200 6.0.0.6106 key_w_fs IV. SOLUTIONS 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 OpenSSH_6.0.0.6107.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 . OpenSSH_6.0.0.6107 To install the fix package: installp -aXYd . OpenSSH_6.0.0.6107 V. WORKAROUNDS 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: security-alert@austin.ibm.com 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: security-alert@austin.ibm.com 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: 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/91986 X-Force Vulnerability Database:http://xforce.iss.net/xforce/xfdb/92116 CVE-2014-2532 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2532 CVE-2014-2653 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2653 *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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (AIX) iEYEARECAAYFAlOgBk0ACgkQ4fmd+Ci/qhJETQCfVtq+DWv7gvFLrJDdCOgZhJW3 Z2gAn3vdkfKXhola0XTLSez3KigEU8DQ =SS/P -----END PGP SIGNATURE-----