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             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

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        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

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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, 2.2.0.1, 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.

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