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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1565 Security Bulletin: Vulnerability in Diffie-Hellman ciphers affects IBM Cognos Metrics Manager (CVE-2015-4000) 16 June 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Cognos Business Intelligence Publisher: IBM Operating System: AIX HP-UX Linux variants Solaris Windows HP Itanium Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2015-4000 Reference: ESB-2015.1557 ESB-2015.1554 ESB-2015.1552 ESB-2015.1549 ESB-2015.1540 ESB-2015.1536 ESB-2015.1535 ESB-2015.1544.2 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21959812 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Vulnerability in Diffie-Hellman ciphers affects IBM Cognos Metrics Manager (CVE-2015-4000) Document information More support for: Cognos Business Intelligence Metrics Studio Software version: 10.1, 10.1.1, 10.2, 10.2.1, 10.2.2 Operating system(s): AIX, HP Itanium, HP-UX, Linux, Solaris, Windows Reference #: 1959812 Modified date: 2015-06-15 Security Bulletin Summary The Logjam Attack on TLS connections using the Diffie-Hellman (DH) key exchange protocol affects IBM Cognos Metrics Manager. Vulnerability Details CVEID: CVE-2015-4000 DESCRIPTION: The TLS protocol could allow a remote attacker to obtain sensitive information, caused by the failure to properly convey a DHE_EXPORT ciphersuite choice. An attacker could exploit this vulnerability using man-in-the-middle techniques to force a downgrade to 512-bit export-grade cipher. Successful exploitation could allow an attacker to recover the session key as well as modify the contents of the traffic. This vulnerability is commonly referred to as "Logjam". CVSS Base Score: 4.3 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) Affected Products and Versions IBM Cognos Metrics Manager 10.2.2 IBM Cognos Metrics Manager 10.2.1 IBM Cognos Metrics Manager 10.2 IBM Cognos Metrics Manager 10.1.1 IBM Cognos Metrics Manager 10.1 Remediation/Fixes None Workarounds and Mitigations The DH cipher suites must be disabled using Cognos Configuration by performing the following actions: 1) Start Cognos Configuration. 2) Navigate to Security/Cryptography/Cognos 3) Open the supported cipher suites selection dialog. 4) Select all cipher suites that have DH in the the name and remove them from the Current Values List. Select OK to save the new list. 5) Save and restart your service using Cognos Configuration. You should verify applying this configuration change does not cause any compatibility issues. Not disabling the DH stream cipher will expose yourself to the attack described above. IBM recommends that you review your entire environment to identify other areas where you have enabled the DH stream cipher and take appropriate mitigation and remediation actions. Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support alerts like this. References Complete CVSS Guide On-line Calculator V2 Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Acknowledgement Reported to IBM by The WeakDH team at https://weakdh.org Change History 15 June 2015: Original Version Published *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 Security Bulletin. Disclaimer 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. - --------------------------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. 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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 iQIVAwUBVX9uYn6ZAP0PgtI9AQKglA//XoAZ4qWYu/EoF8bgWER27kcknoZhaoAW d2+9f/E8R6RbG4ZksxjhLzx7XDoDrzmILQr5kD8M4WAqyz5ufAn4TNpYKhrUdVdp tA1caWPmi+HP5qFTSB7WUZkch2VKKrtaC/eou1b+8uvK+gCJ3jFt1NNKLICwtQrz YurByF1jK9svyDZEu1xACcBvrwK3wFI+iuwPRBN9lWb7aGhUTbha/ZqGfz7WXWfJ 6Ii7ENDKAX8wvt0cEcrXvnNzEEaOEZWkHsJ88gj9RDQC/CiKwW0FN02IlB85IWVg MV2BtPle5MxEJAjoPvn0xDleYXz2jOVcPh7j59LjjQCu7SjSIetsmwDjsv2sDlqN v+Vv6hVzMMpzUbSf3zZBaPFVvxzbpnUjSEzBN2SMSP7BEHNmBj5/rU2dnsBXxE28 x1f5yxKpHXzExRQ3GTctKeG5dAPvAnb/0Wz4mVWB2sirlI4Dhhl/QK/y2SutWudd 1YLanDGT+q3rs6ClMpAAsapQCvkqUDlNsFxBxmVYRnHzZe1HIKyU+sYrK8utXhG/ 8DLyjRZlFAku5ZtX9Kum5htF1mnIYHod26c7zNxCJlv6BUCq6I56sAor096Ey5HU 9CD03mr5vGk7StLQGCR56dLcTzT526zQEL7ur/EpBxb06EzfAUztmI+JcANvkLrd 9wq9I4AfZXE= =bVFH -----END PGP SIGNATURE-----