26 March 2014
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0393 Security Bulletin: IBM SmartCloud Orchestrator - Nova compute DoS through ephemeral disk backing files (CVE-2013-6437) 26 March 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM SmartCloud Orchestrator Publisher: IBM Operating System: Red Hat Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2013-6437 Reference: ESB-2014.0285 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21667330 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: IBM SmartCloud Orchestrator - Nova compute DoS through ephemeral disk backing files (CVE-2013-6437) Security Bulletin Document information More support for: IBM SmartCloud Orchestrator Software version: 2.2, 18.104.22.168, 2.3 Operating system(s): Linux Red Hat - xSeries Reference #: 1667330 Modified date: 2014-03-24 Summary By repeatedly creating snapshots, changing the os_type to a new random value, and spawning new instances from the snapshot (and quickly deleting those instances), an authenticated user could generate lots of different ephemeral disk backing files and fill up compute node disks, potentially resulting in a Denial of Service against a Nova setup. Only Nova setups running the libvirt driver are affected. Vulnerability Details CVE ID: CVE-2013-6437 DESCRIPTION: OpenStack Compute (Nova) is vulnerable to a denial of service, caused by an error when handling an image having os_type metadata. By creating a snapshot of instance and deleting the original instance, an attacker could exploit this vulnerability to fill the disk and cause system to crash. CVSS: CVSS Base Score: 5.0 CVSS Temporal Score See http://xforce.iss.net/xforce/xfdb/89848 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P) Affected Products and Versions IBM SmartCloud Orchestrator 2.2 and 2.3 Remediation/Fixes The recommended solution is to apply the fix as soon as practical. Please see below for information on the fixes available. Fix: Upgrade to IBM SmartCloud Orchestrator 2.3 FP1 Workarounds and Mitigations The exposure applies only to KVM regions Ensure IBM SmartCloud Orchestartor end users do not have access to compute nodes References Complete CVSS Guide On-line Calculator V2 Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Acknowledgement None Change History March 31st 2014 Original Copy 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. If you do not know who that is, please send an email to email@example.com 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. 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