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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0997 AIX OpenSSH Vulnerability 18 June 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenSSH Publisher: IBM Operating System: AIX Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-2653 CVE-2014-2532 Reference: ESB-2014.0444 ESB-2014.0363 Original Bulletin: http://aix.software.ibm.com/aix/efixes/security/openssh_advisory4.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----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----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU6DseBLndAQH1ShLAQJLdRAArp5eZU5N2lRu6F8i4Zn2hB69Jicop/54 lKw0kckfdsGV8a7YP6d1vqUq00b1qkxzo+neG1dKBwKVpTyaqlyItMUCb3puzP7j Pa9SiAP9mB9r1AOaLcubYPmFy1Oxs27XbZGbXMIEbBGvN65oP6ZU3K9Ph294ahdS lsV3A7m5eB5en0E+kp1/P/I5U10xzxE/HjMUr2ERT+JC+stLzqNfO2pwG9tbIxgP rW9QOcgQ24g5N+1Ge+cL0ANheSDdxMu8do3VMeiZvFlz4Aej0mfogK60P0R875iV +hBHWMcNPtHZsxMwil8zWvKGXe3wV9bizTVaOaZ7/LM6oGddNOl3IyXuZ4yCefT8 WmDrM5KIZ/62sdcCw7HMf/LIEJ11HDXkiHdWE5Ng9SuT/lS07ynUQ/eECpf++F6u jmdjNolo4g6OfRTW8rRmpErX6IjIWnkLFAvGpaZ70Ed1/UNMY56V4wEYsongE8O1 YvYjRMJ+VRCHqRe4jJ2JrwGAaiY+4gEDko3yoGI9XRmSG7Z/twHq5sIsQYk+LC1C K55z+3savuyeDBaSBQsX8YAyaPVhuPv5vPx/t53JugmvcFRMliqhJuVtFIbgaYUZ phAWyiAdImEGAWhvMBR5YX8hNg7ldLqcm21SWUlD9OB4UX4nCh5dDSuROJp9YP7h vrmTzaPq/5w= =opyt -----END PGP SIGNATURE-----