09 October 2015
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2564 Cisco UCS B-Series Blade Servers Denial of Service Vulnerability 9 October 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco UCS B-Series Blade Servers Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2015-4265 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151006-ucs - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco UCS B-Series Blade Servers Denial of Service Vulnerability Medium Advisory ID: cisco-sa-20151006-ucs Published: 2015 October 6 21:00 GMT Version 1.0: Final CVSS Score: Base - 4.9 Workarounds: Yes Cisco Bug IDs: CSCuq77241 CVE-2015-4265 CWE-399 Summary A vulnerability in Cisco Unified Computing System (UCS) B-Series blade servers could allow an unauthenticated, local attacker to cause the host operating system or Baseboard Management Controller (BMC) to hang. The vulnerability is due to how the various components communicate across the Inter-IC (I2C) bus. An attacker could exploit this vulnerability by sending specific I2C packets. An exploit could allow the attacker to cause disruption to the host, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151006-ucs Affected Products Vulnerable Products The following Cisco UCS B-Series blade servers running Cisco UCS B-Series Blade Server Software prior to release 2.2.6 are vulnerable: Cisco UCS B200 M3 Blade Server Cisco UCS B420 M3 Blade Server Cisco UCS B22 M3 Blade Server Cisco UCS B260 M4 Blade Server Cisco UCS B460 M4 Blade Server Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds If connection to the Cisco Integrated Management Controller (CIMC) is alive, resetting the blade power will recover the blade. If CIMC is in a unresponsive "hanging" state or resetting blade power does not resolve the issue, resetting the slot will recover the blade. Fixed Software When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. URL http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151006-ucs Revision History Version Description Section Status Date 1.0 Initial public release. NA Final 2015-October-06 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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: email@example.com 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). 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