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Security Bulletin: IBM SmartCloud Orchestrator - Nova compute DoS through ephemeral disk backing files (CVE-2013-6437)

Security Bulletin


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 might generate lots of different ephemeral disk backing files. These files than fill up compute node disks, which potentially results 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, which is caused by an error when handling an image that has os_type metadata. By creating a snapshot of instance and deleting the original instance, an attacker might exploit this vulnerability to fill the disk and cause the system to crash.

CVSS:
CVSS Base Score: 5.0
CVSS Temporal Score See https://exchange.xforce.ibmcloud.com/vulnerabilities/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 V2.2 and 2.3

Remediation/Fixes

The recommended solution is to upgrade to IBM SmartCloud Orchestrator Version 2.3.0 Fix Pack 1 as soon as practical.

Workarounds and Mitigations

The exposure applies only to KVM regions.
Ensure that IBM SmartCloud Orchestrator end users do not have access to the compute nodes

Get Notified about Future Security Bulletins

References

Off

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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
17 June 2018

UID

swg21667330